Articles de revues : « Bio-based building materials »

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M, Khoukhi. « Thermal Assessment of a New Bio - Based Insulation Material ». Open Access Journal of Waste Management & ; Xenobiotics 2, n^o 4 (2019) : 1–5. http://dx.doi.org/10.23880/oajwx-16000133.

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In recent times, the building sector is moving towards new approaches to energy - efficient design "low energy consumption". The development of bio - based thermal insulation materials contributes to such approaches; their implementation in the building gives a good result in a reduction of energy demand. Moreover, another beneficial environmental portion such as the reduction in the depletion of non - renewable resources and in waste generation. Using thermal insulation in the building envelope can substantially reduce the building's thermal load and consequently its energy consumption. Thermal insulation is organic or inorganic material, manufactured to reduce the propagation of the heat by a combined heat transfer (i.e., conduction, convection, and radiation). More advanced insulation materials have been recently developed. However, most of the available insulations are not eco - friendly and may require a huge amount of energy and complex manufacturing processes to be produced. Some commercialized bio - based therm al insulation materials are currently available, such as industrial fibers hemp, flax, kenaf. Also, recently some researches are conducted to develop thermal food - crop by - product insulation from palm date, pin apple leaves and rice husk. However, productio n cost and lower thermal resistance are the main correlated issues. A new cheap bio - insulation material with huge commercialization potential and environmental footprint is proposed. The main idea of running a project is to develop a new material, which is environmentally friendly insulation from grain. The early experiments of the insulation product showed a similar or even better thermal performance that could compete with common insulation materials such as polystyrene.

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Obuka, Vaira, Maris Sinka, Vizma Nikolajeva, Solvita Kostjukova, Ruta Ozola-Davidane et Maris Klavins. « Microbiological Stability of Bio-Based Building Materials ». Journal of Ecological Engineering 22, n^o 4 (1 avril 2021) : 296–313. http://dx.doi.org/10.12911/22998993/134033.

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Najmi, Abdeali. « Innovative Materials and Techniques for Sustainable Building Structures ». INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, n^o 04 (6 avril 2024) : 1–5. http://dx.doi.org/10.55041/ijsrem30133.

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The construction industry faces a growing challenge to meet the demands for sustainable buildings. This research paper explores innovative materials and techniques that are revolutionizing the way we design and construct structures. The focus is on minimizing environmental impact, reducing energy consumption, and promoting resource efficiency throughout a building's life cycle the paper examines promising materials like bio-based insulation, carbon-storing concrete, and recycled content composites. It explores advanced technologies such as 3D-printed buildings and smart glass facades that contribute to energy savings and improved building performance. Additionally, sustainable construction techniques like passive design, prefabrication, and rainwater harvesting are discussed. This research aims to provide a comprehensive overview of the latest advancements in sustainable building practices. By analyzing the benefits and potential drawbacks of these innovative materials and techniques, the paper paves the way for a more sustainable future for the construction industry. Keywords: Sustainable Building, Innovative Materials, Bio-based Materials, Energy Efficiency, Resource Efficiency, 3D Printing, Smart Glass, Passive Design, Prefabrication, Rainwater Harvesting.

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Palanti, Sabrina, Ali Temiz, Gaye Köse Demirel, Gökhan Hekimoğlu, Ahmet Sarı, Meysam Nazari, Mohamed Jebrane, Thomas Schnabel et Nasko Terziev. « Bio-Based Phase Change Materials for Wooden Building Applications ». Forests 13, n^o 4 (12 avril 2022) : 603. http://dx.doi.org/10.3390/f13040603.

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Solid wood can serve multifunctionality for energy savings in buildings. The study reveals the results of biodeterioration and degradation of solid Scots pine wood used to incorporate single or multicomponent fatty acid mixtures as bio-based phase change materials (BPCMs). The sapwood samples were impregnated with capric acid (CA), methyl palmitate (MP), lauryl alcohol (LA) and a mixture of coconut oil fatty acids and linoleic acid (CoFA-LA). The samples were tested against subterranean termites by an Italian species (Reticulitermes lucifugus), the wood boring beetle Hylotrupes bajulus and mold through a discoloration test. Tested against termites, the impregnated samples were significantly less susceptible to the attack than the controls, i.e., the tested BPCMs were resistant to R. lucifugus. The only test with MP terminated at the moment against H. bajulus showed positive results with no larvae surviving. The mold discoloration test revealed that the wood impregnated with CoFA-LA was identically susceptible to mold discoloration when compared to the control, nonimpregnated samples. This pioneer study verifies that solid wood employed for the encapsulation of BPCMs for building purposes can serve identically or somewhat better than similar wooden building elements regarding attacks of the above microorganisms and insects. Such multifunctional building elements will be tested further in a pilot scale building to characterize better the durability aspects of the new materials.

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Nguyen, Dang Mao, Anne-Cécile Grillet, Quoc-Bao Bui, Thi My Hanh Diep et Monika Woloszyn. « Building bio-insulation materials based on bamboo powder and bio-binders ». Construction and Building Materials 186 (octobre 2018) : 686–98. http://dx.doi.org/10.1016/j.conbuildmat.2018.07.153.

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Jones, Dennis. « COST FP1303 “performance of bio-based building materials” ». Wood Material Science & ; Engineering 14, n^o 1 (7 octobre 2018) : 1–2. http://dx.doi.org/10.1080/17480272.2018.1528569.

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Parlato, Monica C. M., et Andrea Pezzuolo. « From Field to Building : Harnessing Bio-Based Building Materials for a Circular Bioeconomy ». Agronomy 14, n^o 9 (21 septembre 2024) : 2152. http://dx.doi.org/10.3390/agronomy14092152.

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The transition from a linear to circular economy is driving a growing emphasis on utilizing bio-based materials for bioenergy and construction purposes. This literature review seeks to offer a thorough bibliometric and critical analysis of bio-based building materials, particularly those that incorporate agricultural residues. A selection of pertinent articles was analyzed using text-mining techniques, revealing a substantial increase in research output on this topic, from 74 publications in 2000 to 1238 in 2023. Key areas such as sustainability, sources of bio-based materials, building applications, design and analysis, material properties, and processes have been extensively examined. The cluster “Sustainability” was the most frequently discussed topic, comprising 28.85% of the content, closely followed by “Building Materials and Techniques” at 28.07%. Given the critical role of life cycle assessment (LCA) in sustainability, an additional analysis was conducted focusing on existing research addressing this subject. The findings of this study are aimed at advancing the incorporation of waste-derived bio-based materials into a circular economy framework, thereby supporting the broader objectives of sustainability and resource efficiency.

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Stevulova, Nadezda, et Jozef Junak. « Green Building Materials Based on Waste Filler and Binder ». Civil and Environmental Engineering 17, n^o 2 (1 décembre 2021) : 542–48. http://dx.doi.org/10.2478/cee-2021-0055.

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Abstract This study is aimed at the application of alternative binder (AB) into bio-aggregate-based composite. The technically important parameters (density, thermal conductivity, water absorption and compressive strength) of 28, 60 and 90 days hardened green composites containing chemically and physico-chemically modified hemp hurds (HH) with AB compared to the Portland cement (PC) are presented. Testing of two reference bio-composites with original HH confirmed higher values of compressive strength and thermal conductivity unlike water absorption for all hardened specimens based on alternative binder (MgO-cement) compared to conventional PC. Changes in the final properties of hardened bio-composites were affected by treatment process of organic filler and alkaline nature of MgO-cement. The combination of purified HH by ultrasound treatment and AB appears to be promising for preparation of bio-based composite material with better properties compared to PC. In this paper, other option of the preparation of bio-composite system based on original (non-treated) filler and binder consisting of optimal activated MgO and silica fume is presented.

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M. Shaju, Pragash. « Bio-based lightweight building blocks : A review ». i-manager's Journal on Structural Engineering 11, n^o 4 (2023) : 40. http://dx.doi.org/10.26634/jste.11.4.19806.

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This paper explores the development and utilization of bio-based lightweight building blocks as a sustainable solution in the construction industry. With increasing concerns about the environmental impact of traditional building materials, there is a growing need for eco-friendly alternatives. This study investigates the potential of natural and renewable materials, such as agricultural waste fibers, bamboo, or hemp, in combination with binders to create lightweight building blocks that offer both structural integrity and environmental sustainability. The research focuses on the formulation of these blocks, considering the optimal combination of bio-based materials and binders to achieve the desired properties. The performance characteristics of the bio-based lightweight building blocks, including structural strength, thermal insulation, fire resistance, and durability, are evaluated. The study also highlights the contribution of these blocks to sustainable construction practices, such as reducing carbon footprints and promoting resource efficiency. By providing an overview of the existing research in this field, the paper discusses the benefits and challenges associated with bio-based lightweight building blocks exploring economic feasibility, availability of materials, and compatibility with existing construction practices. Furthermore, the paper suggests avenues for future research, emphasizing the need for standardized testing protocols, certification systems, and a wider implementation of bio-based lightweight building blocks in the construction industry. This study sheds light on the potential of bio-based lightweight building blocks to mitigate environmental impact, improve sustainability, and drive innovation in construction practices.

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Mnasri, Faiza, Sofiane Bahria, Mohamed El-Amine Slimani, Ouhsaine Lahoucine et Mohammed El Ganaoui. « Building incorporated bio-based materials : Experimental and numerical study ». Journal of Building Engineering 28 (mars 2020) : 101088. http://dx.doi.org/10.1016/j.jobe.2019.101088.

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Argalis, Pauls P., Maris Sinka, Martins Andzs, Aleksandrs Korjakins et Diana Bajare. « Development of New Bio-Based Building Materials by Utilising Manufacturing Waste ». Environmental and Climate Technologies 28, n^o 1 (1 janvier 2024) : 58–70. http://dx.doi.org/10.2478/rtuect-2024-0006.

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Abstract Over the last decade, research has increasingly focused on reducing the use of natural resources and improving waste management in the construction industry. Various possibilities exist for reducing waste in this sector, ranging from using waste as filler materials to developing new binders and building materials. This study focuses on the development of bio-based building materials using waste from the manufacturing of wood-wool cement boards. The binder and filler materials were obtained from the manufacturing waste and used in this research. The developed materials were tested for their visual appearance, macrostructure, material density, thermal conductivity coefficient and compressive strength. The results showed promising data for the self-bearing bio-based building materials, which had similar thermal properties to other bio-based materials and could be used as thermal insulation materials with a thermal conductivity coefficient of 0.0827–0.1172 W/(mK). The material density of the developed bio-based composites was found to be 430–617 kg/m3. By incorporating manufacturing waste into the production process of bio-based building materials, it becomes evident that overall waste from manufacturing plants can be significantly reduced, and the sustainability aspect of wood-cement board manufacturers can be enhanced.

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Bosák, Lukáš, et Milan Palko. « Wall Panel Made of Bio-composites ». MATEC Web of Conferences 279 (2019) : 02010. http://dx.doi.org/10.1051/matecconf/201927902010.

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Sustainability is currently an important part of the building industry. The development of new building constructions and the use of ecological materials is a very popular topic in this area. One example of organic material are natural fibres bio-composites. Bio-composite materials are currently used in the form of laminates mainly used in the sport and furniture industries. This article addresses their use in the building industry as the outer envelope of buildings. The article deals with the testing of the influence of UV radiation and moisture on the degradation of Bio-composites with recommendation of possible ways of their protection. In the next section, it deals with the design of composite wall panel with Bio-composite laminates on the top layer. This panel will contain mycelium as thermal insulation. The assumption of the use of this type of construction in the building industry is based on the possibility of replacing conventional materials used nowadays and reducing the environmental load by the building industry. The use of new types of eco-friendly building materials is in accordance with the EU strategy.

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Cosentino, Livia, Jorge Fernandes et Ricardo Mateus. « A Review of Natural Bio-Based Insulation Materials ». Energies 16, n^o 12 (12 juin 2023) : 4676. http://dx.doi.org/10.3390/en16124676.

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Within the context of climate change and the environmental impact of the building industry, insulation materials contribute to improving the thermal performance of buildings, thus reducing energy demand and carbon emissions during the operation phase. Although most of them are responsible for significant carbon emissions during their production, bio-based insulation materials can provide good performance with low carbon emissions. This paper aims to investigate natural insulation materials’ properties and environmental impacts through a literature review. Due to the growing importance of Environmental Product Declarations (EPDs) on specification requirements, many manufacturers already disclose environmental data related to their products, allowing for a comparison between thermal insulation solutions. In academic research, embodied environmental impacts are not as explored as physical properties. In addition, from the analysis of results, it is possible to conclude that the characterization of the physical properties of this type of material is normally focused on thermal conductivity. Nevertheless, most studies overlook other important parameters of these materials, such as the thermal capacity, lifetime, and environmental impacts. This is something that is necessary to overcome in future developments to allow for a comprehensive comparison between the properties of different (conventional and bio-based) insulation materials.

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Brás, Ana, Ana Antunes, Aurélie Laborel-Préneron, Rahul Ralegaonkar, Andy Shaw, Mike Riley et Paulina Faria. « Optimisation of bio-based building materials using image analysis method ». Construction and Building Materials 223 (octobre 2019) : 544–53. http://dx.doi.org/10.1016/j.conbuildmat.2019.06.148.

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Barbieri, Virginia, Magdalena Lassinantti Gualtieri et Cristina Siligardi. « Wheat husk : A renewable resource for bio-based building materials ». Construction and Building Materials 251 (août 2020) : 118909. http://dx.doi.org/10.1016/j.conbuildmat.2020.118909.

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Viel, Marie, Florence Collet, Yann Lecieux, Marc Louis Maurice François, Valentin Colson, Christophe Lanos, Atif Hussain et Mike Lawrence. « Resistance to mold development assessment of bio-based building materials ». Composites Part B : Engineering 158 (février 2019) : 406–18. http://dx.doi.org/10.1016/j.compositesb.2018.09.063.

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Vitola, L., M. Vilnitis, I. Pundiene et D. Bajare. « Sustainable building materials based on hemp shives and geopolymer paste ». Journal of Physics : Conference Series 2162, n^o 1 (1 janvier 2022) : 012015. http://dx.doi.org/10.1088/1742-6596/2162/1/012015.

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Abstract European regulations states that the construction industry must encourage the rational and prudent use of non-renewable natural resources, as well as and increase the use of reusable resources and promote the use of renewable natural resources in production. Bio-composites based on natural aggregates such as hemp shives are widely studied and used in building sector due to their extensive properties of a range that primarily is so wide, as hempshives are increasingly combined with various binders and as their production technology is evolving rapidly. In this study three series of geopolymer paste (GP) samples were studied to obtain the most suitable binder for the production of hemp shive-based bio-composites, as well as a bio-composites were created from the most suitable binder and described their compressive strength and thermal conductivity performance.

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Nguyen, Dang Mao, Anne-Cécile Grillet, Thi My Hanh Diep, Chi Nhan Ha Thuc et Monika Woloszyn. « Hygrothermal properties of bio-insulation building materials based on bamboo fibers and bio-glues ». Construction and Building Materials 155 (novembre 2017) : 852–66. http://dx.doi.org/10.1016/j.conbuildmat.2017.08.075.

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Zuluaga, Simon Sanchez, Stylianos Kallioras et Anastasios Tsiavos. « Optimization of Synergetic Seismic and Energy Retrofitting Based on Timber Beams and Bio-Based Infill Panels : Application to an Existing Masonry Building in Switzerland ». Buildings 12, n^o 8 (29 juillet 2022) : 1126. http://dx.doi.org/10.3390/buildings12081126.

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This paper presents an optimization process for the design of a novel synergetic seismic and energy retrofitting strategy that combines the favorable mechanical properties of timber and the attractive thermal insulation properties of bio-based materials. The novel method, defined as Strong Thermal and Seismic Backs (STSB), comprises the attachment of timber frames and bio-based thermal insulation panels on the vertical envelope and the facade walls of existing masonry buildings, thus improving both the seismic behavior and the energy performance of these buildings. This strategy is integrated and visualized in a novel synergetic framework for the holistic evaluation of the seismic behavior, the energy performance and the carbon footprint of existing buildings, defined as the Seismic and Energy Retrofitting Scoreboard (SERS). The benefit of the novel retrofitting strategy is quantified based on the numerical simulation of the seismic behavior of an unreinforced masonry building located in Switzerland, an assessment of the energy performance of the building and an evaluation of the carbon footprint of the proposed retrofit solution. Three retrofitting alternatives are investigated for the synergetic seismic and energy retrofitting of the building, comprising timber beams and two different bio-based materials for the thermal insulation of the vertical envelope of the building: cork and recycled natural grass. The optimal seismic and energy retrofitting strategy for the building among the alternatives assessed in this study is chosen based on a Multi-Criteria Decision Making (MCDM) procedure.

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Motamedi, Sina, Daniel R. Rousse et Geoffrey Promis. « The Evolution of Crop-Based Materials in the Built Environment : A Review of the Applications, Performance, and Challenges ». Energies 16, n^o 14 (8 juillet 2023) : 5252. http://dx.doi.org/10.3390/en16145252.

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The use of bio-based building materials as an alternative to replacing concrete or insulation materials is called to become a growing trend in the construction industry. On Science direct, publications concerning “bio-based materials” have increased from 4 in 2002 to 1073 twenty years later, demonstrating a growing interest in these materials However, among bio-based materials, crop or plant-based materials are not as popular. Due to their relative novelty, little is known about their potential applications, physical characteristics, and environmental impacts. The aim of this review is to qualitatively investigate the technical and environmental viability of crop-based materials in modern building applications. The specific objectives of the study consider greenhouse gas (GHG) emissions using life cycle assessment (LCA) approaches, contribution to the circular economy, and physical and hygrothermal characteristics. Another objective is to examine the progress of crop-based materials’ R&D, current bottlenecks, and a future roadmap for their evolution in state-of-the-art renewable buildings. The paper is broad enough to capture a large readership rather than experts in the domain. The review reveals that crop-based materials have the potential to replace traditional, highly emissive building materials. They offer low environmental impacts, in all stages of their life cycle.

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Badouard, Céline, Chadi Maalouf, Christophe Bliard, Guillaume Polidori et Fabien Bogard. « Hygric Behavior of Viticulture By-Product Composites for Building Insulation ». Materials 15, n^o 3 (21 janvier 2022) : 815. http://dx.doi.org/10.3390/ma15030815.

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One possible approach to reducing the environmental impacts associated with the building sector is the development and use of bio-based building materials. The objective of this study is to determine the water properties of bio-based insulation materials, derived from winegrowing co-products, which promote energy efficiency. The water performance of these new bio-based materials is based on the measurement of the moisture buffer value, the sorption isotherm, and the water vapor permeability. Four by-products are analyzed: stalks, grape pomace, crushed stalks, and skins; they are combined with a potato starch binder. The performance of these composites is compared to two other bio-based composites (hemp/starch and beet pulp/starch). The stalk/starch composite can be classified as a hygroscopic and breathable material with excellent moisture retention capacity.

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Huang, Gang, Ariane Abou-Chakra, Sandrine Geoffroy et Joseph Absi. « A Multi-Scale Numerical Simulation on Thermal Conductivity of Bio-Based Construction Materials ». Construction Materials 2, n^o 3 (4 juillet 2022) : 148–65. http://dx.doi.org/10.3390/constrmater2030011.

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Amid increasing concern about carbon emissions and ENERGY consumption in the building industry, bio-based construction materials are one of the solutions, especially considering their excellent thermal insulation. This study aims to develop a multi-scale numerical model to analyze the effect of microstructure on the thermal conductivity of a bio-based construction material. To achieve this, the size, shape, orientation, porosity, and water saturation of the bio-aggregate were considered in this study. The results show that the thermal conductivity of the bio-based material increases significantly and nonlinearly with water saturation, in contrast to the parallel thermal conductivity of the transversely isotropic bio-aggregate, which increases linearly. The thermal conductivity of the bio-based material shows an anisotropy in different directions and it obtains a maximum at water saturation of 0.4. Analysis of inclusions with different shapes shows that the thermal conductivity in the compaction direction is almost independent of the shape, but not in the direction perpendicular to the compaction. The finite element results show that the heat flow tends to transfer along the bio-aggregate rather than across it. These findings help to better understand the effect of microstructure on thermal conductivity and then promote the application of bio-based concrete as an insulation material in buildings.

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Quintana-Gallardo, Alberto, Jesús Alba, Romina del Rey, José E. Crespo-Amorós et Ignacio Guillén-Guillamón. « Life-Cycle Assessment and Acoustic Simulation of Drywall Building Partitions with Bio-Based Materials ». Polymers 12, n^o 9 (30 août 2020) : 1965. http://dx.doi.org/10.3390/polym12091965.

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The ecological transition is a process the building industry is bound to undertake. This study aimed to develop new bio-based building partition typologies and to determine if they are suitable ecological alternatives to the conventional non-renewable ones used today. This work started with the development of a bio-based epoxy composite board and a waste-based sheep wool acoustic absorbent. Six different partition typologies combining conventional and bio-based materials were analyzed. A drywall partition composed of gypsum plasterboard and mineral wool was used as the baseline. First, a cradle-to-gate life cycle assessment was performed to compare their environmental impacts. Secondly, a mathematical simulation was performed to evaluate their airborne acoustic insulation. The LCA results show a 50% decrease in the amount of CO2 equivalent emitted when replacing plasterboard with bio-composite boards. The bio-composites lower the overall environmental impact by 40%. In the case of the acoustic absorbents, replacing the mineral wool with cellulose or sheep wool decreases the carbon emissions and the overall environmental impact of the partition from 4% and 6%, respectively. However, while the bio-based acoustic absorbents used offer good acoustic results, the bio-composites have a lower airborne acoustic insulation than conventional gypsum plasterboard.

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Nazari, Meysam, Mohamed Jebrane et Nasko Terziev. « Bio-Based Phase Change Materials Incorporated in Lignocellulose Matrix for Energy Storage in Buildings—A Review ». Energies 13, n^o 12 (13 juin 2020) : 3065. http://dx.doi.org/10.3390/en13123065.

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Due to growing consciousness regarding the environmental impact of fossil-based and non-sustainable materials in construction and building applications, there have been an increasing interest in bio-based and degradable materials in this industry. Due to their excellent chemical and thermo-physical properties for thermal energy storage, bio-based phase change materials (BPCMs) have started to attract attention worldwide for low to medium temperature applications. The ready availability, renewability, and low carbon footprint of BPCMs make them suitable for a large spectrum of applications. Up to now, most of the BPCMs have been incorporated into inorganic matrices with only a few attempts to set the BPCMs into bio-matrices. The current paper is the first comprehensive review on BPCMs incorporation in wood and wood-based materials, as renewable and sustainable materials in buildings, to enhance the thermal mass in the environmentally-friendly buildings. In the paper, the aspects of choosing BPCMs, bio-based matrices, phase change mechanisms and their combination, interpretation of life cycle analyses, and the eventual challenges of using these materials are presented and discussed.

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Zerari, Salima, Rossella Franchino et Nicola Pisacane. « The potential impacts of using bio-based building materials on human health and wellbeing ». E3S Web of Conferences 436 (2023) : 01006. http://dx.doi.org/10.1051/e3sconf/202343601006.

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When selecting building materials, health and wellbeing are aspects that are frequently neglected. It has been discovered that traditional materials are a source of hazardous emissions that have a negative impact on the health of individuals. On the other hand, Bio-based Building materials are increasingly being used instead of conventional materials as the construction sector aims to be more sustainable. However, these materials’ potential impacts on human health and wellbeing are also a source of worry. As a result, the purpose of this study is to present a comprehensive review of pertinent scientific research, with a focus on comparative studies that shed light on the effects of using bio-based building materials. Considering both positive and negative health effects, with a focus on indoor environment quality, indoor contaminants, and psychological health and well-being. The results highlight the need for more study and provide insightful information about how using bio-based building materials affects individuals’ health and well-being.

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Lafond, Cassandra, et Pierre Blanchet. « Technical Performance Overview of Bio-Based Insulation Materials Compared to Expanded Polystyrene ». Buildings 10, n^o 5 (26 avril 2020) : 81. http://dx.doi.org/10.3390/buildings10050081.

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The energy efficiency of buildings is well documented. However, to improve standards of energy efficiency, the embodied energy of materials included in the envelope is also increasing. Natural fibers like wood and hemp are used to make low environmental impact insulation products. Technical characterizations of five bio-based materials are described and compared to a common, traditional, synthetic-based insulation material, i.e., expanded polystyrene. The study tests the thermal conductivity and the vapor transmission performance, as well as the combustibility of the material. Achieving densities below 60 kg/m3, wood and hemp batt insulation products show thermal conductivity in the same range as expanded polystyrene (0.036 kW/mK). The vapor permeability depends on the geometry of the internal structure of the material. With long fibers are intertwined with interstices, vapor can diffuse and flow through the natural insulation up to three times more than with cellular synthetic (polymer) -based insulation. Having a short ignition times, natural insulation materials are highly combustible. On the other hand, they release a significantly lower amount of smoke and heat during combustion, making them safer than the expanded polystyrene. The behavior of a bio-based building envelopes needs to be assessed to understand the hygrothermal characteristics of these nontraditional materials which are currently being used in building systems.

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Moussa, Tala, Chadi Maalouf, Christophe Bliard, Boussad Abbes, Céline Badouard, Mohammed Lachi, Silvana do Socorro Veloso Sodré et al. « Spent Coffee Grounds as Building Material for Non-Load-Bearing Structures ». Materials 15, n^o 5 (24 février 2022) : 1689. http://dx.doi.org/10.3390/ma15051689.

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The gradual development of government policies for ecological transition in the modern construction sector leads researchers to explore new alternative and low environmental impact materials with a particular focus on bio-sourced materials. In this perspective, the mechanical, thermal insulation, and the sound absorption performances of a spent coffee grounds/potato starch bio-based composite were analyzed for potential application in buildings. Based on thermal conductivity and diffusivity tests, the coffee grounds waste biocomposite was characterized as an insulating material comparable with conventional thermal insulation materials of plant origin. Acoustical tests revealed absorption coefficients in the same range as other conventional materials used in building acoustical comfort. This bio-sourced material presented a sufficient compressive mechanical behavior for non-load-bearing structures and a sufficient mechanical capacity to be shaped into building bricks. Mechanical, thermal, and acoustic performances depend on the moisture environment. The groundwork was laid for an initial reflection on how this composite would behave in two opposite climates: the continental climate of Reims in France and the tropical climate of Belém in Brazil.

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Igue, Fathia Dahir, Anh Dung Tran Le, Alexandra Bourdot, Geoffrey Promis, Sy Tuan Nguyen, Omar Douzane, Laurent Lahoche et Thierry Langlet. « Impact of Temperature on the Moisture Buffering Performance of Palm and Sunflower Concretes ». Applied Sciences 11, n^o 12 (10 juin 2021) : 5420. http://dx.doi.org/10.3390/app11125420.

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The use of bio-based materials (BBM) in buildings is an interesting solution as they are eco-friendly materials and have low embodied energy. This article aims to investigate the hygric performance of two bio-based materials: palm and sunflower concretes. The moisture buffering value (MBV) characterizes the ability of a material or multilayer component to moderate the variation in the indoor relative humidity (RH). In the literature, the moisture buffer values of bio-based concretes were measured at a constant temperature of 23 °C. However, in reality, the indoor temperature of the buildings is variable. The originality of this article is found in studying the influence of the temperature on the moisture buffer performance of BBM. A study at wall scale on its impact on the indoor RH at room level will be carried out. First, the physical models are presented. Second, the numerical models are implemented in the Simulation Problem Analysis and Research Kernel (SPARK) suited to complex problems. Then, the numerical model validated with the experimental results found in the literature is used to investigate the moisture buffering capacity of BBM as a function of the temperature and its application in buildings. The results show that the temperature has a significant impact on the moisture buffering capacity of bio-based building materials and its capacity to dampen indoor RH variation. Using the numerical model presented in this paper can predict and optimize the hygric performance of BBM designed for building application.

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Kanchale, Nikhil. « A Review on Recent Research on Bio?Based Building Materials and their Applications ». International Journal for Research in Applied Science and Engineering Technology 11, n^o 12 (31 décembre 2023) : 885–908. http://dx.doi.org/10.22214/ijraset.2023.57438.

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Abstract: Bio-based materials represent a promising alternative in building envelope applications, with the aim of improving inuse energy efficiency. They have the advantage of being renewable, low embodied energy and CO2 neutral or negative. In addition, they are excellent thermal regulators. This paper presents an overview of the state-of-the-art of bio-based materials used in building construction and their applications. The materials outlined include hemp, wood, date palm wood, cork, alfa and straw. Through this literature study we want to get a broad overview of the current state of theoretical and experimental studies of their hygrothermal characteristics and their thermal and energy performances. The aim is not to be exhaustive but to summarise the most important research results on these materials. This is the first part of a research work that deals wit h the contribution to the development of a new bio-based construction material to be used in building.

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Fischer, Henriette, et Azra Korjenic. « Hygrothermal Performance of Bio-Based Exterior Wall Constructions and Their Resilience under Air Leakage and Moisture Load ». Buildings 13, n^o 10 (21 octobre 2023) : 2650. http://dx.doi.org/10.3390/buildings13102650.

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The use of renewable building materials in construction is crucial to minimising the environmental impact of new buildings. Bio-based building materials have a wide range of positive properties, many of which are due to their hygroscopic behaviour. The purpose of this study is to investigate the hygrothermal performance of chopped straw, sheep’s wool, and cellulose insulated timber frame external wall assemblies in the presence of air leakage and high indoor relative humidity. For this purpose, tests with different moisture contents, overpressures, and defects in the airtight layer were carried out in an outdoor test stand over a period of 18 months. The results were compared with a conventional mineral wool insulated construction. Both sheep’s wool and cellulose are particularly fault-tolerant insulation materials in combination with timber frame constructions. All three bio-based insulations, despite defects in the airtight layer, showed no mould-prone moisture content. An installation level insulated with sheep’s wool can increase the fault tolerance of constructions with insulation made of hygric and more sensitive building materials. For chopped straw and cellulose, the measured U-value was lower than expected. Further in situ measurements of bio-based structures are important to gain confidence in their hygrothermal behaviour and to increase their use in multi-storey construction.

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Ferreira, Elisa S., Camila A. Rezende et Emily D. Cranston. « Fundamentals of cellulose lightweight materials : bio-based assemblies with tailored properties ». Green Chemistry 23, n^o 10 (2021) : 3542–68. http://dx.doi.org/10.1039/d1gc00326g.

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Frandsen, K. M., J. V. Lennert, R. L. Jensen et P. Møldrup. « Estimating the hydratable surface area of building materials from water vapour sorption ». Journal of Physics : Conference Series 2654, n^o 1 (1 décembre 2023) : 012046. http://dx.doi.org/10.1088/1742-6596/2654/1/012046.

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Abstract The specific surface area of a building material controls its physical, chemical, and biological functions and services, including its moisture regulating potential. The Hydratable Specific Surface Area (H-SSA) of a building material can be estimated from its primary water vapour adsorption and desorption isotherm at a given relative humidity (RH) value or range of RH. The concept is illustrated for 12 mineral and bio-based building materials. The estimated H-SSA for only 1 kg of some building materials can approach the area of a typical agricultural field (500,000 m2, 50 ha.), which helps explain and illustrate the great moisture regulating properties of many bio-based materials. The H-SSA appears useful to help characterize and classify building materials.

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Ranefjärd, Oskar, Paulien B. Strandberg-de Bruijn et Lars Wadsö. « Hygrothermal Properties and Performance of Bio-Based Insulation Materials Locally Sourced in Sweden ». Materials 17, n^o 9 (26 avril 2024) : 2021. http://dx.doi.org/10.3390/ma17092021.

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In recent years, there has been a paradigm shift in the building sector towards more sustainable, resource efficient, and renewable materials. Bio-based insulation derived from renewable resources, such as plant or animal fibres, is one promising group of such materials. Compared to mineral wool and polystyrene-based insulation materials, these bio-based insulation materials generally have a slightly higher thermal conductivity, and they are significantly more hygroscopic, two factors that need to be considered when using these bio-based insulation materials. This study assesses the hygrothermal properties of three bio-based insulation materials: eelgrass, grass, and wood fibre. All three have the potential to be locally sourced in Sweden. Mineral wool (stone wool) was used as a reference material. Hygrothermal material properties were measured with dynamic vapour sorption (DVS), transient plane source (TPS), and sorption calorimetry. Moisture buffering of the insulation materials was assessed, and their thermal insulation capacity was tested on a building component level in a hot box that exposed the materials to a steady-state climate, simulating in-use conditions in, e.g., an external wall. The tested bio-based insulation materials have significantly different sorption properties to stone wool and have higher thermal conductivity than what the manufacturers declared. The hot-box experiments showed that the insulating capacity of the bio-based insulators cannot be reliably calculated from the measured thermal conductivity alone. The results of this study could be used as input data for numerical simulations and analyses of the thermal and hygroscopic behaviour of these bio-based insulation materials.

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Gajić, Darija, Slobodan Peulić, Tim Mavrič, Anna Sandak, Črtomir Tavzes, Milica Malešević et Mladen Slijepčević. « Energy Retrofitting Opportunities Using Renewable Materials—Comparative Analysis of the Current Frameworks in Bosnia-Herzegovina and Slovenia ». Sustainability 13, n^o 2 (10 janvier 2021) : 603. http://dx.doi.org/10.3390/su13020603.

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Sustainable approaches for retrofitting buildings for energy efficiency are becoming necessary in a time when the building sector is the largest energy consumer. Retrofitting building stock is effective for reducing global energy consumption and decreasing resource exploitation. Less developed EU member states and neighboring developing countries show reluctance towards healthy and renewable materials. Implementation of sustainable materials for energy retrofitting is slowed down due to gaps in legislation and effective strategic programs, availability of bio-based materials, lack of knowledge regarding use and maintenance of renewable products, and marketing lobbies. Use of bio-based materials in refurbishment is important due to their negative or low global warming potential (GWP), low primary energy (PEI) need for production, cost-effective benefits, and recycling/reuse potential. Role of environmentally friendly solutions and low-carbon economy growth is particularly relevant in developing countries, such as Bosnia-Herzegovina, that cannot afford innovative energy recovery systems, yet possess a significant amount of poorly managed building stock. This research aims to analyze frameworks regarding retrofitting of residential buildings in Bosnia-Herzegovina and Slovenia. The analysis tackles indirect causes, studies the legal background, and examines strategic frameworks; thus, it indicates potential barriers for implementation of recommended retrofitting solutions based on renewable materials.

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Gajić, Darija, Slobodan Peulić, Tim Mavrič, Anna Sandak, Črtomir Tavzes, Milica Malešević et Mladen Slijepčević. « Energy Retrofitting Opportunities Using Renewable Materials—Comparative Analysis of the Current Frameworks in Bosnia-Herzegovina and Slovenia ». Sustainability 13, n^o 2 (10 janvier 2021) : 603. http://dx.doi.org/10.3390/su13020603.

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Sustainable approaches for retrofitting buildings for energy efficiency are becoming necessary in a time when the building sector is the largest energy consumer. Retrofitting building stock is effective for reducing global energy consumption and decreasing resource exploitation. Less developed EU member states and neighboring developing countries show reluctance towards healthy and renewable materials. Implementation of sustainable materials for energy retrofitting is slowed down due to gaps in legislation and effective strategic programs, availability of bio-based materials, lack of knowledge regarding use and maintenance of renewable products, and marketing lobbies. Use of bio-based materials in refurbishment is important due to their negative or low global warming potential (GWP), low primary energy (PEI) need for production, cost-effective benefits, and recycling/reuse potential. Role of environmentally friendly solutions and low-carbon economy growth is particularly relevant in developing countries, such as Bosnia-Herzegovina, that cannot afford innovative energy recovery systems, yet possess a significant amount of poorly managed building stock. This research aims to analyze frameworks regarding retrofitting of residential buildings in Bosnia-Herzegovina and Slovenia. The analysis tackles indirect causes, studies the legal background, and examines strategic frameworks; thus, it indicates potential barriers for implementation of recommended retrofitting solutions based on renewable materials.

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PIEGAY, Clément, Philippe GLé et Chems ANWAR. « Poroelasticity and acoustic properties of bio-based materials : from characterization to the understanding of mechanical dissipation effects ». INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, n^o 2 (4 octobre 2024) : 9653–63. http://dx.doi.org/10.3397/in_2024_4281.

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The building sector is a key element in reducing the effects of climate change. To operate sustainably and efficiently, solutions based on building materials having a low environmental impact, such as bio-based materials, are needed. In fact, they present high-level multi-functional properties and they capture atmospheric carbon dioxide. However, even if a number of works has examined visco-thermal dissipation effects, the understanding of the mechanical dissipation effects on the acoustic performances of bio-based materials is still incomplete and little data are available in the literature. Therefore, it seems particularly relevant to investigate by experimental characterizations and modelling methods the effects of mechanical dissipation on the acoustic properties of a representative variety of bio-based materials such as vegetal wools, vegetal aggregate stacks and vegetal concretes. To do this, Young's modulus, Poisson's ratio and structural damping were measured on the various typology of materials by a quasi-static analysis method. The non-linear elastic behaviour in compression of bio-based samples is analyzed. Finally, the influence of Young's modulus and structural damping on the acoustic absorption and attenuation properties of bio-based materials is described using modelling approaches.

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Valkonen, Mikko J., Jose Cucharero, Tapio Lokki, Lauri Rautkari et Tuomas Hänninen. « Preparation of fully bio-based sound absorbers from waste wood and pulp fibers by foam forming ». BioResources 18, n^o 2 (8 février 2023) : 2657–69. http://dx.doi.org/10.15376/biores.18.2.2657-2669.

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Building materials that are bio-based and produced from waste streams have a substantial effect on the carbon footprint of buildings. In this study, the authors prepared fully bio-based sound absorbers from waste wood and other cellulosic materials. Cutter shavings (CSs), softwood pulp, and cellulose powder (CP) were used as raw materials to prepare sound absorber samples using the foam-forming technique. The fully bio-based sound absorbers prepared were mechanically stable. However, an increase in CSs content decreased their mechanical properties, and samples with high CSs content became difficult to handle. The CP increased the mechanical properties, but it did not affect the sound absorption of the samples. The sound absorption properties of these fully bio-based materials could be tuned by carefully selecting CSs and fiber contents and adjusting the thickness of the material. Greater CSs content decreased the sound absorption properties of the materials. This decrease was mainly due to an increase in the average pore size, leading to poorer sound energy dissipation by visco-thermal effects.

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Pavelek, Miloš, et Tereza Adamová. « Bio-Waste Thermal Insulation Panel for Sustainable Building Construction in Steady and Unsteady-State Conditions ». Materials 12, n^o 12 (22 juin 2019) : 2004. http://dx.doi.org/10.3390/ma12122004.

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Apart from being used as an oil stock for bio-fuels production, an annual crop plant Brassica napus, thought to be an agro-waste, and used either as an animal feed, soil fertilizer or biomass for combustion and thermal energy production. Alternatively, as a bio-based and locally bio-sourced cellulosic material, it could be used as a thermal insulation in sustainable building fabrication, likewise woodchips, a bio-waste from the wood industry. In this study, the above-mentioned bio-waste materials’ thermal properties were identified using a sandwich panel from medium density fibreboard (MDF) and wood studs. Premanufactured panels have been filled in with randomly oriented short-cut rapeseed and with short-cut woodchips. A modified guarded hot box method was used to designate steady and un-steady state thermo-physical parameters of such insulation panels. The examined bio-waste materials absorbed thermal fluctuations of the exterior environment and kept the indoor building environment at constant temperature regardless of such fluctuations. The ability of bio-based sandwich panels to store heat energy was found to be similar to mineral wool. Additionally, VOC (volatile organic compound) emissions of tested materials were identified using gas chromatography-mass spectrometry (GC-MS) combined with headspace solid-phase microextraction (HS-SPME) to declare materials’ harmlessness to indoor environmental quality and human wellbeing. In conclusion, bio-based short-cut materials proved to be a viable environmentally friendly and energy efficient alternative to conventionally used thermal insulations.

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Promis, G., L. Freitas Dutra, O. Douzane, A. D. Tran Le et T. Langlet. « Temperature-dependent sorption models for mass transfer throughout bio-based building materials ». Construction and Building Materials 197 (février 2019) : 513–25. http://dx.doi.org/10.1016/j.conbuildmat.2018.11.212.

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Le, Dinh Linh, Roberta Salomone et Quan T. Nguyen. « Sustainability assessment methods for circular bio-based building materials : A literature review ». Journal of Environmental Management 352 (février 2024) : 120137. http://dx.doi.org/10.1016/j.jenvman.2024.120137.

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Rosa Latapie, Séverine, Ariane Abou-Chakra et Vincent Sabathier. « Bibliometric Analysis of Bio- and Earth-Based Building Materials : Current and Future Trends ». Construction Materials 3, n^o 4 (30 novembre 2023) : 474–508. http://dx.doi.org/10.3390/constrmater3040031.

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The energy and environmental transition in the building sector requires the development and use of low-impact materials. Despite the growing interest in bio-based and earth-based building materials, their widespread adoption is still limited due to a lack of hindsight, as their study is relatively recent. This study aims to contribute to the development of these materials by providing an extensive overview of key contributors (authors, countries, journals) in these fields. Then, the keywords of the corresponding publications were analyzed to reveal the main topics covered to date. First, a broad scale is presented, followed by a focus on sub-categories, specifically raw materials for bio-based building materials and implementation techniques for earth-based ones. Finally, a comparative analysis, with the themes covered by composite construction materials as a whole, completes the study. Using statistical analysis coupled with bibliometric network visualization software, this study provides clear, quantifiable, and objective insights into current trends. Furthermore, it facilitates the identification of new, promising research perspectives and highlights the importance of interdisciplinary collaboration. Physics, modeling, durability and microstructure studies emerge as relevant levers for advancing the future development of these eco-friendly building materials.

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Morganti, Luca, Laura Vandi, Julen Astudillo Larraz, Javier García-Jaca, Arsenio Navarro Muedra et Alessandro Pracucci. « A1–A5 Embodied Carbon Assessment to Evaluate Bio-Based Components in Façade System Modules ». Sustainability 16, n^o 3 (31 janvier 2024) : 1190. http://dx.doi.org/10.3390/su16031190.

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As the construction industry moves toward sustainable building practices, incorporating wood-based materials into building envelope systems has become a priority. This paper investigates the environmental impact of three custom bio-composite Façade System Modules (FSMs) through an Embodied Carbon Assessment (ECA), focused on the Global Warming Potential indicator of life cycle stages from cradle to practical completion (A1–A5). The evaluated FSMs were developed within the Basajaun H2020 project (G.A. 862942), by substituting and combining conventional materials with other bio-composite products to form hybrids from bio-based polymers and wood. A benchmark ECA was conducted, simulating alternative FSMs devised with common practice solutions for the curtain wall façade to facilitate a comprehensive comparison. The life cycle inventory encompassed detailed technical information, fostering the utilization of primary data for accuracy. The study particularly highlights considerations over three technological systems of the modules that incorporate increased use of wood-based components and a novel bio-composite material: the frame profiles, the insulation equipment, and the seal system. Despite the challenges due to the Basajaun FSMs’ weight, the findings reveal that replacing the currently used materials with wood-based materials and bio-composites reduced the embodied emissions, particularly substituting aluminum frame profiles. The insights presented here offer indicators toward circular, environmentally conscious, bio-composed building envelopes, emphasizing the need for continued analysis and refinements as a consequence of increasing the accuracy of the available primary data from the supply chain and concerning end-of-life scenarios.

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Barreca, Francesco, Natale Arcuri, Giuseppe Davide Cardinali et Salvatore Di Fazio. « A Bio-Based Render for Insulating Agglomerated Cork Panels ». Coatings 11, n^o 12 (30 novembre 2021) : 1478. http://dx.doi.org/10.3390/coatings11121478.

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Natural and bio-based thermal insulation materials play an important role in the lifecycle impact of buildings due to their influence on the amount of energy used in indoor temperature control and the environmental impact of building debris. Among bio-based materials, cork is widespread in the Mediterranean region and is one of the bio-based materials that is most frequently used as thermal insulation for buildings. A particular problem is the protection of the cork-agglomerated panels from external stress and adverse weather conditions; in fact, cork granulates are soft and, consequently, cork panels could be damaged by being hit or by excessive sun radiation. In this study, an innovative external coat for cork-agglomerated panels made of a blending composite of beeswax and rosin (colophony) is proposed. The performance of this composite, using different amounts of elements, was analysed to discover which mix led to the best performance. The mix of 50% beeswax and 50% rosin exhibited the best performance out of all the mixes. This blend demonstrated the best elongation and the lowest fracture density, characteristics that determine the durability of the coating. A performance comparison was carried out between cork panel samples coated with lime render and beeswax–rosin coating. The coating of beeswax and resin highlighted a detachment value about 3.5 times higher than the lime plaster applied on the side of the cork.

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Guo, Haibo, Siyuan Zhou, Tongyu Qin, Lu Huang, Wenjie Song et Xunzhi Yin. « Energy Sustainability of Bio-Based Building Materials in the Cold and Severe Cold Regions of China—A Case Study of Residential Buildings ». Applied Sciences 10, n^o 5 (26 février 2020) : 1582. http://dx.doi.org/10.3390/app10051582.

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The aim of this research is to investigate the energy sustainability of cross-laminated timber (CLT) and straw residential buildings in the Cold and Severe Cold Regions of China. In the study, three building materials, namely reinforced concrete (RC), CLT, and straw bale, are used separately to design the building envelope in reference residential buildings in different climate zones. The energy consumption during the operation phase of these buildings is then simulated using Integrated Environmental Solutions—Virtual Environment software (IES-VE). The results show that both CLT and straw buildings are more efficient than reinforced concrete with a reduction in energy consumption during the operational phase. Overall, the calculated heating energy-saving ratios for CLT buildings in Hailar, Harbin, Urumchi, Lanzhou, and Beijing are 3.04%, 7.39%, 7.43%, 12.69%, and 13.41%, respectively, when compared with RC. The calculated energy-saving ratios for heating in straw buildings in comparison with RC in these cities are 8.04%, 22.09%, 22.17%, 33.02%, and 34.28%, respectively. The results also reveal that a south orientation of the main building facade results in approximately 5% to 7% energy reduction in comparison with east or west orientations, and as the building height increases, energy consumption decreases gradually. Although RC is the most frequently used building material in Cold and Severe Cold regions in China, as bio-based building materials, there is great potential to promote CLT and straw bale construction in view of the energy sustainability features.

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Zotova, Inga, Staņislavs Gendelis, Edgars Kirilovs et Dejan Štefanec. « Thermal Performance of Lignocellulose’s By-Product Wallboards with Bio-Based Microencapsulated Phase Change Materials ». Energies 17, n^o 1 (4 janvier 2024) : 257. http://dx.doi.org/10.3390/en17010257.

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The growing availability and decreasing cost of microencapsulated phase change materials (PCMs) present an opportunity to develop innovative insulation materials for latent heat energy storage. By integrating PCMs with traditional insulation materials, it is possible to enhance the thermal capacity of a building by up to 2.5-times, virtually without increasing the building’s mass. To improve buildings’ indoor structural performance, as well as improving their energy performance, microencapsulated PCMs are integrated into wallboards. The integration of microencapsulated PCMs into the wallboard solves the PCM leakage problem and assures a good bond with the building materials to achieve better structural performance. The novelty of this research is the application of encapsulated phase change material dispersion and technology for its incorporation into the structure of hemp shives and longitudinally milled wood chip-based insulation boards, using cold pressing technology to reduce the energy consumption of board production. As a result, low-density insulation boards for indoor application were produced by varying their structure and the amount of phase change materials in the range of 5% to 15% by board mass. The obtained board prototypes can be used as microclimate and thermoregulation elements of interiors, as well as functional aesthetic elements of interior design.

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Ahadzadeh Ghanad, D., A. Soliman, S. Godbout et J. Palacios. « Properties of bio-based controlled low strength materials ». Construction and Building Materials 262 (novembre 2020) : 120742. http://dx.doi.org/10.1016/j.conbuildmat.2020.120742.

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Amziane, Sofiane, et Mohammed Sonebi. « Overview on Biobased Building Material made with plant aggregate ». RILEM Technical Letters 1 (2 juin 2016) : 31. http://dx.doi.org/10.21809/rilemtechlett.2016.9.

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Global warming, energy savings, and life cycle analysis issues are factors that have contributed to the rapid expansion of plant-based materials for buildings, which can be qualified as environmental-friendly, sustainable and efficient multifunctional materials. This review presents an overview on the several possibilities developed worldwide about the use of plant aggregate to design bio-based building materials. The use of crushed vegetal aggregates such as hemp (shiv), flax, coconut shells and other plants associated to mineral binder represents the most popular solution adopted in the beginning of this revolution in building materials. Vegetal aggregates are generally highly porous with a low apparent density and a complex architecture marked by a multi-scale porosity. These geometrical characteristics result in a high capacity to absorb sounds and have hygro-thermal transfer ability. This is one of the essential characteristics which differ of vegetal concrete compared to the tradition mineral-based concretes. In addition, the high flexibility of the aggregates leads to a non-fragile elasto-plastic behavior and a high deformability under stress, lack of fracturing and marked ductility with absorbance of the strains ever after having reached the maximum mechanical strength. Due to the sensitivity to moisture, the assessment of the durability of vegetal concrete constitutes one of the next scientific challenging of bio-based building materials.

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Amziane, Sofiane, et Mohammed Sonebi. « Overview on Biobased Building Material made with plant aggregate ». RILEM Technical Letters 1 (2 juin 2016) : 31. http://dx.doi.org/10.21809/rilemtechlett.v1.9.

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Global warming, energy savings, and life cycle analysis issues are factors that have contributed to the rapid expansion of plant-based materials for buildings, which can be qualified as environmental-friendly, sustainable and efficient multifunctional materials. This review presents an overview on the several possibilities developed worldwide about the use of plant aggregate to design bio-based building materials. The use of crushed vegetal aggregates such as hemp (shiv), flax, coconut shells and other plants associated to mineral binder represents the most popular solution adopted in the beginning of this revolution in building materials. Vegetal aggregates are generally highly porous with a low apparent density and a complex architecture marked by a multi-scale porosity. These geometrical characteristics result in a high capacity to absorb sounds and have hygro-thermal transfer ability. This is one of the essential characteristics which differ of vegetal concrete compared to the tradition mineral-based concretes. In addition, the high flexibility of the aggregates leads to a non-fragile elasto-plastic behavior and a high deformability under stress, lack of fracturing and marked ductility with absorbance of the strains ever after having reached the maximum mechanical strength. Due to the sensitivity to moisture, the assessment of the durability of vegetal concrete constitutes one of the next scientific challenging of bio-based building materials.

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Jang, Bill. « Preliminary evaluation of value—added bio-based building blocks ». Impact 2020, n^o 4 (13 octobre 2020) : 6–8. http://dx.doi.org/10.21820/23987073.2020.4.6.

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The global economic system is currently organised to exploit fossil fuel-based technologies. Resources are extracted from the earth and undergo a multitude of different processing steps to become a myriad of different and essential everyday products. Unfortunately, most of these products are disposed of soon after use and can cause huge waste disposal and environmental problems. In addition, the manufacturing process itself can cause further problems. This linear system has proven extremely effective at production; however, it is, ultimately, unsustainable. The dream future for both the environment and resource conservation is an economy that is capable to reusing used end-products – a circular economy. The path to a circular economy, however, is a winding and treacherous one. To make it work, it is necessary to consider the whole system and the wide variety of stakeholders therein. It is essential to work out the incentives for manufacturers, users and potential re-users, as well as those of governments and nations. Most importantly, the technology underpinning it has to be as good or better than those that are currently in use. Researchers at the Industrial Technology Research Institute (ITRI), Taiwan are working to develop one important section of the linear fossil fuel economy into a more circular form. The team, led by Dr Guang-Way Bill Jang, are working on producing polymers from biological sources. They are also working on developing new materials and chemicals from these sources.

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Broyles, Jonathan M. « The building material renaissance : A review of innovative low-carbon, healthy, and acoustically viable building materials ». Journal of the Acoustical Society of America 156, n^o 4_Supplement (1 octobre 2024) : A28. https://doi.org/10.1121/10.0034991.

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With the pressing need to curb carbon emissions in buildings, architects and designers are increasingly determining low-carbon mitigation strategies across all building disciplines. One solution is the selection of novel low-carbon construction materials, often composed of recycled materials, bio-based products, or wastes. These new building materials are commonly manufactured without harmful chemicals, thereby making the building safer for its occupants. Furthermore, many of the building materials have acoustic benefits, such as improved sound absorption at mid-frequencies. While this new era of building materials encourages low-carbon and healthy buildings, many designers are unaware of them and their advantages. This presentation aims to educate acousticians, designers, and other practitioners by providing a review of innovative building materials (e.g., Pliteq’s GenieMat, fSorb’s Acoustic Panels) that both aid decarbonization efforts and improve building acoustics. An additional outcome of this work is an early version of an open-access dataset of building materials and products for their carbon emissions and acoustic benefit. Overall, this presentation continues the theme of reducing the carbon emissions in the building environment while also considering occupant health and acoustic performance.

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