Готові списки джерел за темами / Fire-resistant cement

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Добірка наукової літератури з теми "Fire-resistant cement"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Fire-resistant cement"

Saxena, S. K., Mukesh Kumar, and N. B. Singh. "Fire Resistant Properties of Alumino Silicate Geopolymer cement Mortars." Materials Today: Proceedings 4, no. 4 (2017): 5605–12. http://dx.doi.org/10.1016/j.matpr.2017.06.018.

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Gazizov, Asgat, Elena Popova, Vadim Abzalilov, and Aisylu Sagitova. "Increasing the Fire Resistance of Reinforced Concrete Structures." Key Engineering Materials 910 (February 15, 2022): 914–22. http://dx.doi.org/10.4028/p-1754m8.

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Анотація:

The disadvantage of reinforced concrete structures is their gradual destruction at high temperatures, above 250-300°C under the influence of fire, due to disturbance of cement binder structure. Therefore, the development of a fire-resistant composition for reinforced concrete is urgent. The article describes the study of tetraethoxysilane (TES) 6% and 10% as a fire retardant additive for sand-cement mortar, for building structures made of metal, the experimental study of sand-cement mortar using tetraethoxysilane 6% and 10%, with different methods of application to the metal is stated. An assessment of the effectiveness of TPP in interaction with sand-cement mortar is given.

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Konoplianyk, Oleksandr, Nikolay Kotov, and Illia Iliev. "Specific Design Features of Prefabricated Fire-Resistant Floor Slabs Made from Lightweight Concrete." Slovak Journal of Civil Engineering 30, no. 1 (March 1, 2022): 1–7. http://dx.doi.org/10.2478/sjce-2022-0001.

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Abstract Reinforced concrete roof and floor structures have the highest heating temperatures and are exposed to the most difficult conditions during fires that occur in buildings and structures. The standardized fire resistance of hollow-core slabs made of heavy concrete from Portland cement is regulated as REI 45 or REI 60. The aim of the work is to develop a composition of lightweight fire-resistant concrete and architectural engineering for floor slab devices. The composition of lightweight fire-resistant concrete made from expanded clay aggregates and alumina cement was developed as a result of the work. The degree of fire resistance of the lightweight concrete composition with a bulk density of 1475 kg/m3 has been practically determined; i.e., REI 90. The structural solution of the floor slab has been improved; at the same time, we propose to develop a slab with a flat section made of lightweight fire-resistant concrete. Such floor slabs, along with an increase in the fire resistance limit, improve the heat-insulating ability of a floor due to a significant reduction in the coefficient of the thermal conductivity of lightweight concrete.

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Tsapko, N. "RADIATION RESISTANT BINDING MATERIALS BASED ON SILICATE ALUMOBARIUM CEMENTS." Municipal economy of cities 1, no. 154 (April 3, 2020): 67–70. http://dx.doi.org/10.33042/2522-1809-2020-1-154-67-70.

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The article analyzes the possibility of developing custom binders with a set of set properties. Particular attention is paid to the development of radiation-resistant barium-containing cements based on aluminates and barium silicates. In order to normalize the radiation situation in Ukraine, it is urgent to develop structural materials with specified high protective properties against the effects of radiation, a high degree of biological protection in combination with high strength and fire resistance. The main components of the technological parameters of synthesis of the presented cements are determined. Test results of physical and mechanical properties of refractory radiation resistant cements are presented and general recommendations on the scope of the developed binder materials are given. It is determined that the resulting refractory cement can be used as a bond in the manufacture of special concretes and materials that have high protective properties while exposed to high temperatures and radiation. Thermal stability of concrete based on silicate alumobarium cement with different fillers was determined (cooling of the samples was carried out in air). As a result of the tests, it was found that all concrete specimens withstood more than 20 cycles (1000 ° C - air), while maintaining more than 80 % of the initial strength. These results confirm the known pattern: the higher the material density, the greater the material's ability to absorb radiation. Thus, the obtained data allow us to conclude that concrete based on silicate alumobarium cement have high absorption rates of brake radiation, which is more than 1.5 times higher than currently used concrete based on Portland cement. Therefore, it can be concluded that the concretes obtained are radiation resistant, with a high degree of attenuation of gamma rays and can be recommended as protective materials. Keywords: cement, composition, synthesis parameters, radiation resistance, property, strength

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Pacher, Thomas, Marius Cătălin Barbu, Johannes Urstöger, Alexander Petutschnigg, and Eugenia Mariana Tudor. "Fire Retardancy of Cementitious Panels with Larch and Spruce Bark as Bio-Admixtures." Polymers 14, no. 7 (April 4, 2022): 1469. http://dx.doi.org/10.3390/polym14071469.

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Анотація:

The aim of this study is to investigate the production of fire-resistant panels made out of bark from spruce (Picea abies), larch (Larix decidua Mill.) and cement. This research included test panels produced from bark, cement, water and cement-bonded recycling material aiming for the target density of 750 kg/m3. The physical (density, dimension stability, thickness swelling) and mechanical properties such as tensile strength and compressive strength together with fire resistance were tested. Considering the results, appealing values have been achieved: max. compressive strength: 3.42 N/mm2; max. thickness swelling: 5.48%; and density: 515 to 791 kg/m3. In principle, the properties of the produced panels depend not only on the density, but also on the hydration and, above all, on the compaction and the composition of the boards. The fire tests demonstrated that the produced panels have an enormous potential in terms of fire resistance and could be utilized for fire-retardant applications.

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Konstantinova, N. I., N. V. Smirnov, O. V. Krivoshapkina, and O. I. Molchadskiy. "On the Issue of Safe Use of Fiber Cement Materials in the Buildings and Structures." Occupational Safety in Industry, no. 7 (July 2021): 35–41. http://dx.doi.org/10.24000/0409-2961-2021-7-35-41.

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Анотація:

Fiber cement finishing materials are widely used in the construction of industrial buildings and structures due to the complex of valuable operational properties. In the Russian market there are fiber-cement panels with a variety of design solutions for their coloring and application of protective coatings. Fiber cement board is a strong and moisture-resistant composite material made from a cement-sand mixture, reinforcing cellulose fibers and special additives. Not being a non-combustible material, the fiber cement boards in accordance with the current mandatory requirements, as a decorative, finishing and facing material for walls and ceilings have restrictions on their use. Existing domestic requirements regarding the methodology for assessing the combustibility of fiber cement products largely narrow the field of using these materials. Therefore, it is advisable to develop the proposals for amending the test methods and the regulatory framework governing their fire-safe extended scope. In the course of this work execution, the main provisions of the regulatory and methodological framework that establish the requirements for the fire-safe use of fiber cement materials are analyzed. Experimental complex studies of fire hazard properties of various types of samples of the fiber cement finishing panels and slabs were carried out. It is established that fiber-cement materials belong to the class of the least fire-hazardous materials. Advisability is determined concerning the introduction to the national regulatory practice of GOST R «Building materials. Test method for fire hazard under thermal exposure with a single burner (SBI)». Classification parameters of the group of non-combustible materials NG2 were established to amend GOST R 57270—2016 (method 1). Classification parameters of the group of non-combustible materials NG2 for making changes in GOST R 57270—2016 (method 1) are established. Proposals were developed to expand the scope of application of the materials and products made of fiber cement as enclosing structures, partitions, and decorative finishes (cladding) in the buildings and structures.

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Bodnárová, Lenka, Jitka Peterková, Jiri Zach, and Iveta Nováková. "Study of Heat Transport in Structure of Concrete." Advanced Materials Research 1000 (August 2014): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amr.1000.302.

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Анотація:

Current trend of construction of ring roads in large cities going often underground emphasizes safety of implementation and using of such constructions, which is closely connected to possible risks of a fire in these predominantly monolithic structures made from steel reinforced concrete. The paper gives results of the research focused on thermally-technical properties of cement based composite materials resistant to high temperature suitable for application in places with higher risk of fire, like secondary lining of tunnels or underground car parks. The aim was verification of appropriateness of testing mix-designs for application in structures possibly endangered by fire.

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Kim, Seong-Deok, Sang-Yun Kim, Ki-Sun Bae, Su-Hee Park, and Bum-Sik Lee. "Field Application of 80MPa High Strength Fire Resistant Concrete using Ternary Blended Cement." Journal of the Korea Institute of Building Construction 10, no. 5 (October 20, 2010): 113–19. http://dx.doi.org/10.5345/jkic.2010.10.5.113.

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Khlystov, A. I., S. V. Sokolova, M. N. Baranova, D. I. Vasilieva, and Yu A. Kholopov. "Prospects for Using Alumina-Containing Industrial Waste in Cement Production." Ecology and Industry of Russia 25, no. 7 (July 20, 2021): 13–19. http://dx.doi.org/10.18412/1816-0395-2021-7-13-19.

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Анотація:

Local industrial waste from the Samara region (aluminochrome waste of petrochemicals, aluminium sludge of non-ferrous metallurgy) has been studied for use in the production of fire-resistant lining materials with enhanced operational characteristics. The composition and properties of industrial wastes formed at the Samara Metallurgical Plant and their application for obtaining active liquid-steel binder compositions have been studied. The dependence of these compositions refractoriness on the type of hardener and the amount of additive has been analyzed.

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Obodovich, O. M., O. M. Nedbailo, O. G. Chernyshyn, and A. E. Nedbailo. "Intensification of loosening of asbestos fibers by means of hydromechanical processing." Кераміка: наука і життя, no. 1(50) (March 17, 2021): 26–29. http://dx.doi.org/10.26909/csl.1.2021.4.

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Анотація:

Acceptance of high-quality aqueous suspensions based on chrysotile asbestos is an urgent technical task in a number of industries. Asbestos-cement mortar is used as an asbestos-cement crust for insulation of walls and other building surfaces, due to this composition of the treated surfaces perfectly retain heat, resistant to moisture, and most importantly - asbestos fibers contribute to the smoothness of the surface and crack is not formed. No less popular is the use of asbestos-cement mortar with a high content of asbestos in the insulation of ventilation ducts and pipelines. This composition of asbestos-cement mortar is used to strengthen the joints of asbestos-cement pipes, as well as as a filler in the laying of cast iron pipes to give the joints additional elasticity. Asbestos-cement mortar has plasticity, resistance to stretching and reinforcement of asbestos, as well as strength and versatility in the use of cement. Due to these properties, asbestos and cement perfectly adhere to each other to obtain a durable, strong, frost-resistant, virtually waterproof and fire-resistant building material. The result of the microscopic examination is reason to believe that from the technological process of production of slate can be removed electromechanical mixer for the preparation of a solution of asbestos + water + portland cement. In this case, given the fact of continued loosening of asbestos in the preparation of the mold mixture of asbestos + water + portland cement, it will be sufficient to ensure the degree of loosening of asbestos in the ripper at the minimum required level (for example, not more than 85%). It is assumed to obtain a mold mixture with a high degree of homogeneity of the components with reduced costs of Portland cement due to its physico-chemical activation by hydraulic fluxes.

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Більше джерел

Дисертації з теми "Fire-resistant cement"

Пітак, Ярослав Миколайович. "Вогнетривкі та жаростійкі неформовані матеріали на основі композицій системи RO – R₂O₃ – RO₂ – P₂O₅". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2005. http://repository.kpi.kharkov.ua/handle/KhPI-Press/40380.

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Анотація:

Дисертація на здобуття наукового ступеня доктора технічних наук за спеціальністю 05.17.11 – технологія тугоплавких неметалічних матеріалів. – Національний технічний університет “Харківський політехнічний інститут”, Харків, 2005. Дисертація присвячена розробці наукової концепції створення вогнетривких та жаростійких неформованих матеріалів на основі композицій системи RO – R₂O₃ – RO₂ – P₂O₅. Досліджено субсолідусну будову чотирикомпонентних систем: M–A–S–P, C–А–S–P, Zn–Z–S–B, Zn–A–Z–S, C–M–S–P, A–Z–S–P, M–Z–S–P, C–A–S–B, C–A–Z–S, C–M–A–S, C–Sr–A–Z. Визначено співіснуючі фази в системах, виконано триангуляцію потрійних підсистем та тетраедрацію чотирикомпонентних систем, визначено їх об’єми та ступінь асиметрії, побудовано топологіч-ний граф взаємозв’язку елементарних тетраедрів, надано геометро-топологічну характеристику фаз систем, проведено оцінку евтектичних температур в перерізах систем та побудовано поверхні ліквідусу перетинів. На підставі фізико-хімічних досліджень систем розроблено принципи одержання нових вогнетривких та жаростійких неформованих матеріалів. Розроблені нові склади вогнетривких теплоізоляційних матеріалів, жаростійких та вогнетривких цементів та бетонів на їх основі, набивних мас з високими фізико-механічними та технічними властивостями. Встановлено закономірності фазоутворення, та розроблено принципи одержання цих матеріалів.
Thesis for Doctor of Technical Sciences degree on the speciality 05.17.11 – technology of refractory not metal materials. – National Technical University “Kharkiv Polytechnic Institute”, Kharkiv, 2005. The thesis is devoted to develop scientific conception of creation of fire-resistant and heat resisting materials on the basis of the system RO – R₂O₃ – RO₂ – P₂O₅ compositions. The sub-solidus structure of the four component systems has been investigated: M–A–S–P, C–А–S–P, Zn–Z–S–B, Zn–A–Z–S, C–M–S–P, A–Z–S–P, M–Z–S–P, C–A–S–B, C–A–Z–S, C–M–A–S, C–Sr–A–Z. The co-existed phases in the systems have been determined, the tetrahedra for quaternary systems have been carried out, the volumes elementary tetrahedrons have been determined, the topological characteristic of phases of systems have been given. On the basis of physic-chemical researches of the systems the principles of reception new fire-resistant and heat resisting unforming materials have been developed. New compositions of materials on the base of refractories and cements with high physical, mechanical and technical properties have been developed. The principles of phase-formation have been set up and the principles of obtaining these materials have been worked out.

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Книги з теми "Fire-resistant cement"

Green Materials Obtained by Geopolymerization for a Sustainable Future. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901137.

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Geopolymerization techniques allow the conversion of industrial waste materials into environmentally friendly materials. The vast list of applications includes thermal insulation, fire-resistant materials, construction materials, refractory linings, cements and concretes, encapsulation of radioactive and toxic waste etc. The book presents the technological processes involved, as well as the characterization and applications of the resulting ecomaterials.

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Частини книг з теми "Fire-resistant cement"

Rovnaníková, P., P. Bayer, P. Rovnaník, and J. Novák. "PROPERTIES OF ALKALI-ACTIVATED ALUMINOSILICATE MATERIALS WITH FIRE-RESISTANT AGGREGATE AFTER HIGH TEMPERATURE LOADING." In Cement Combinations for Durable Concrete, 277–86. Thomas Telford Publishing, 2005. http://dx.doi.org/10.1680/ccfdc.34013.0030.

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Тези доповідей конференцій з теми "Fire-resistant cement"

Asako, Y., T. Otaka, and Y. Yamaguchi. "Fire Resistance Characteristics of Fire Protection Materials With High-Water Content." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-1557.

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Анотація:

Abstract It is well known that moist fire protection materials show good fire resistance characteristics. For this reason, these materials are usually made of mixtures of cement mortar and high-water content materials such as silica gels or moist perlites. The latent heat of water plays an important role in the resistance of heat propagation in these materials. In this study, the thermal conductivity of mixtures of perlite-mortar and super-absorbent polymer gel to increase its water storage capacity, were measured. Also, the water content of the test materials was measured. Using the measured thermal properties of such fire protection materials, the numerical simulation for the fire resistant test were conducted. The effects of mixing ratio of the gels and the perlite-mortar on the fire resistance characteristics are discussed.

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Guppy, R. M., S. P. Vines, and S. J. Wisbey. "The Benefits of Cementitious Encapsulation Matrices for the Conditioning of Intermediate Level Waste." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4886.

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Анотація:

The UK has significant quantities of radioactive waste, which have arisen over the past fifty years or so, largely as a result of nuclear power, reprocessing and defence programmes. The intermediate level wastes arising as a result of these activities, exhibit a high level of physical and chemical diversity, and must be managed safely in a way that protects existing and future generations and the environment. Development work has been conducted since the early 1980s to identify suitable conditioning materials and techniques that are compatible with the needs of safe long-term management, including interim storage, transport and future deep geological disposal. From these studies cementation emerged as the one medium which could satisfy all the key waste management criteria. Other materials were not ruled out and may offer benefits in specific applications. The advantages of conditioning ILW with cement include: • the extensive experience of its use in a wide variety of contexts; • the raw materials are relatively cheap and have a long shelf life; • cement is processed in relatively simple plant at room temperature, with safety and cost benefits for plant operators; • the product is fire resistant and of relatively low toxicity; • cement is capable of immobilising a wide range of wastes ranging from solids to aqueous slurries; • cement provides desirable product properties. Desirable properties include: • suitable strength, • chemical control of radionuclide leading to enhanced retention, • good corrosion protection for steels, • low permeability, • tolerance to radiation, • durability over extended timescales, and • good radiation self-shielding properties. Several waste packaging plants are now operational in the UK using cement-based encapsulants. These are currently conditioning ILW for interim storage, in a manner suitable for future transport and compatible with the Nirex phased deep disposal concept. This paper will describe the development of cement-based encapsulants to meet the needs of UK radioactive wastes, and will provide examples of the supporting product quality data.

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Ramakrishnan, S. "Comparative Study on the Behavior of Fiber Reinforced Concrete." In Sustainable Materials and Smart Practices. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901953-13.

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Abstract. Next to water, concrete is the most consumed material in the world. In the construction industries, concrete is a basic material used for high compressive strength, durable, fire resistant but has low tensile strength. This experimental study aimed to investigation the compressive, tensile and flexural strength of the concrete reinforced with three different fibers. Comparative study has been made between metallic: steel fibers and nonmetallic: glass and carbon fiber reinforced concrete. Fibers were used in concrete with fractions of 0%, 0.5%, 1%, 1.5%, 2% and 2.5% by volume of cement in M20 grade of concrete. In this paper, the behavior of cube, cylinder and prism specimen of fiber reinforced concrete (FRC) were deliberated. Addition of fiber in concrete were increased the basic mechanical properties of concrete increases. The steel fiber reinforced concrete attains higher compressive, flexural and tensile strength than concrete with carbon fiber and glass fiber. Carbon fibered concrete attained higher flexural and tensile strength than glass fibered concrete.

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