Relevant bibliographies by topics / Aggregates (Building materials) – Expansion and contraction

Academic literature on the topic 'Aggregates (Building materials) – Expansion and contraction'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Aggregates (Building materials) – Expansion and contraction"

1

Faye, Khemendra. "Review Paper on Comparative Study of RCC Framed Building with and Without Expansion Joint at Different Location." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (January 31, 2022): 986–89. http://dx.doi.org/10.22214/ijraset.2022.39934.

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Abstract: The pounding responses of the expansion joint in a curved ramp bridge under earthquake conditions. Long term effects of such seasonal temperature changes develop stresses and deformation in the building. Concrete creep and shrinkage increase the cracks widths and stresses. For elimination of this expansion joints are provided. The temperature expansion occurred most significantly during 20°C to 40°C and the optimised gradation could alleviate the arch expansion effectively, in the range of 20°C to 30°C. An expansion joint is a gap provided in the structure to allow expansion and contraction of the building due to temperature changes. It absorbs the heat-induced by expansion and contraction of various construction materials. Two theoretical models were used under eight types of seismic conditions. Results indicate that a curved ramp bridge without an abutment expansion joint is a favorable structure for seismic design. Keywords: Earthquake, pounding, Seismic Analysis, Expansion joints, Thermal stresses, Concrete Creep.
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Sibbick, R. G., and C. L. Page. "Threshold alkali contents for expansion of concretes containing British aggregates." Cement and Concrete Research 22, no. 5 (September 1992): 990–94. http://dx.doi.org/10.1016/0008-8846(92)90123-d.

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Menéndez, E., R. García-Roves, B. Aldea, E. Puerto, and H. Recino. "Study of the alkali-silica reaction rate of Spanish aggregates. Proposal of a classification based in accelerated mortar bars tests and petrographic parameters." Materiales de Construcción 71, no. 344 (December 1, 2021): e263. http://dx.doi.org/10.3989/mc.2021.13421.

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The alkali-silica reaction has been studied in depth due to the evolution in the knowledge of the expansive phenomenon. One of its most important aspects is the reaction rate of the aggregates. In Spain, at the early 90s of the 20th century, aggregates were considered almost non-reactive. However, the use of accelerated curing and other environmental factors revealed that there were potentially reactive siliceous aggregates. Nevertheless, there are several siliceous and limestone aggregates with siliceous inclusions that show reactivity over long period. In the present work, open porosity, expansion and petrography with quartz reactivity index have been determined, in 68 siliceous, limestone and dolomitic aggregates, from quarries located in areas with diagnostic reactivity. Based on these parameters and their interrelation, a classification method is proposed to detect slow-reacting aggregates.
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Rivera, J. F., A. Orobio, R. Mejía de Gutiérrez, and N. Cristelo. "Clayey soil stabilization using alkali-activated cementitious materials." Materiales de Construcción 70, no. 337 (February 13, 2020): 211. http://dx.doi.org/10.3989/mc.2020.07519.

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In this study, a clayey soil classified as A-7-5 according ASTM D3282, was stabilized using alkali-activated cementitious materials (AAC) added to the soil dry in percentages of 20 and 30%. Fly ash (F1, F2) with high unburned carbon content (up to 38.76%), hydrated lime (L) and granulated blast furnace slag were used. Unconfined compressive strength and flexural strength at 28 days of curing and the durability after 12 wetting-drying cycles were evaluated. The results were compared with a soil-cement reference mixture. The soil treated with AAC-F1L showed a volume expansion of 0.51% and volume contraction of -0.57% compared with the 0.59% expansion and -0.68% contraction of the soil-cement reference mixture. Additionally, the mass loss after the wetting and drying cycles is only 3.74% which is slightly lower than the mass loss of the soil stabilized with ordinary Portland cement (OPC) (3.86%) and well below the value specified in Colombian regulations (7%).
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Prinčič, Tina, Petra Štukovnik, Stane Pejovnik, Geert De Schutter, and Violeta Bokan Bosiljkov. "Observations on dedolomitization of carbonate concrete aggregates, implications for ACR and expansion." Cement and Concrete Research 54 (December 2013): 151–60. http://dx.doi.org/10.1016/j.cemconres.2013.09.005.

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Amziane, Sofiane, and Mohammed Sonebi. "Overview on Biobased Building Material made with plant aggregate." RILEM Technical Letters 1 (June 2, 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, and Mohammed Sonebi. "Overview on Biobased Building Material made with plant aggregate." RILEM Technical Letters 1 (June 2, 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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8

Neuendorf, Talika A., Niclas Weigel, Michelle Vigogne, and Julian Thiele. "Additive Soft Matter Design by UV-Induced Polymer Hydrogel Inter-Crosslinking." Gels 8, no. 2 (February 14, 2022): 117. http://dx.doi.org/10.3390/gels8020117.

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In recent years, stimuli-responsive hydrogels have gained tremendous interest in designing complex smart 4D materials for applications ranging from biomedicine to soft electronics that can change their properties on demand over time. However, at present, a hydrogel’s response is often induced by merely a single stimulus, restricting its broader applicability. The controlled hierarchical assembly of various hydrogel building blocks, each with a tailored set of mechanical and physicochemical properties as well as programmed stimulus response, may potentially enable the design and fabrication of multi-responsive polymer parts that process complex operations, like signal routing dependent on different stimuli. Since inter-connection stability of such building blocks directly accompanies the transmission of information across building blocks and is as important as the building property itself to create complex 4D materials, we provide a study on the utility of an inter-crosslinking mechanism based on UV-induced 2,3-dimethylmaleimide (DMMI) dimerization to inter-connect acrylamide-based and N-isopropylacrylamide-based millimeter-sized cubic building blocks, respectively. The resulting dual-crosslinked assemblies are freestanding and stable against contraction–expansion cycles in solution. In addition, the approach is also applicable for connecting microfluidically fabricated, micrometer-sized hydrogel spheres, with the resulting assemblies being processable and mechanical stable, likewise resisting contraction–expansion in different solvents, for instance.
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Mehta, PK, CA Rogers, and RD Hooton. "Reduction in Mortar and Concrete Expansion with Reactive Aggregates Due to Alkali Leaching." Cement, Concrete and Aggregates 13, no. 1 (1991): 42. http://dx.doi.org/10.1520/cca10548j.

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Juenger, M. C. G., and C. P. Ostertag. "Influence of synthetic aggregates on expansion due to alkali–silica reaction." Magazine of Concrete Research 57, no. 6 (August 2005): 331–37. http://dx.doi.org/10.1680/macr.2005.57.6.331.

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Dissertations / Theses on the topic "Aggregates (Building materials) – Expansion and contraction"

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Gaylard, Petra Cornelia. "Statistical modelling of the shrinkage behaviour of South African concretes." Thesis, 2012. http://hdl.handle.net/10539/11239.

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MSc., Faculty of Science, University of the Witwatersrand, 2011
A hierarchical non-linear model was developed for the time-dependent shrinkage behaviour of South African concretes, from historical laboratory data. The fit of fifteen growth curve models to the shrinkage-time profiles was evaluated and MCDA was used to identify the best model. The three parameters of the chosen growth curve model were modelled in terms of covariates (relating to concrete raw materials, concrete composition and shrinkage testing conditions) by multivariate multiple regression to produce the WITS model. The model largely conformed to existing knowledge about the factors affecting concrete shrinkage. Published models for concrete shrinkage were compared to the WITS model regarding their predictive ability with respect to the South African data set. The WITS model performed the best across a variety of graphical and numerical goodness-of-fit measures. The importance of the study is two-fold:  The concept of hierarchical non-linear modelling has been applied for the first time to the modelling of the time-dependent properties of concrete.  This is the first comprehensive model to bring together laboratory data on the shrinkage of concrete generated in South Africa over a span of thirty years.
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Books on the topic "Aggregates (Building materials) – Expansion and contraction"

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European Conference on Advanced Materials and Processes (6th 1999 Munich, Germany). Materials for buildings and structures. Edited by Wittmann F. H, Deutsche Gesellschaft für Materialkunde, and Federation of European Materials Societies. [Germany]: Deutsche Gesellschaft für Materialkunde, 2000.

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Federation of European Materials Societies., ed. EUROMAT 99. Weinheim: Wiley-VCH, 2000.

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Carll, Charles. Review of thickness swell in hardboard siding: Effect of processing variables. Madison, Wis. (One Gifford Pinchot Dr., Madison 53705-2398): U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1997.

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Carll, Charles. Review of thickness swell in hardboard siding: Effect of processing variables. Madison, Wis. (One Gifford Pinchot Dr., Madison 53705-2398): U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1997.

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Richardson, Joseph Melvin. Long term deformations of concrete made with Florida aggregates. 1985.

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H, Dimigen, Deutsche Gesellschaft für Materialkunde, and Federation of European Materials Societies., eds. Surface engineering. [Germany]: Deutsche Gesellschaft für Materialkunde, 2000.

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EUROMAT 99, Surface Engineering. VCH Publishers, 2000.

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Forest Products Laboratory (U.S.), ed. Review of thickness swell in hardboard siding: Effect of processing variables. Madison, WI (One Gifford Pinchot Dr., Madison 53705-2398): U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1997.

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Conference papers on the topic "Aggregates (Building materials) – Expansion and contraction"

1

Pagano, Alexander, Brandon Leung, Brian Chien, Tongxi Yan, A. Wissa, and S. Tawfick. "Multi-Stable Origami Structure for Crawling Locomotion." In ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/smasis2016-9071.

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This paper presents the design of a bio-inspired crawling robot comprised of bi-stable origami building blocks. This origami structure, which is based on Kresling origami pattern, expands and contracts through coupled longitudinal and rotational motion similar to a screw. Controlled snapping, facilitated by buckling instability, allows for rapid actuation as seen in the mechanism of the hummingbird beaks or the Venus flytrap plant, which enables them to capture insects by fast closing actions. On a much smaller scale, a similar buckling instability actuates the fast turning motion of uni-flagellated bacteria. Origami provides a versatile and scale-free framework for the design and fabrication of smart actuators and structures based on this bi-stable actuation scheme. This paper demonstrates how a bi-stable origami structure, having the geometry of a polygonal base prism, can be used to actuate crawling gait locomotion. Bi-stable origami structures exhibit buckling instabilities associated with local bending and buckling of their flat panels. Traditional kinematic analysis of these structures based on rigid-plates and hinges at fold lines precludes the shape transformation readily observed in physical models. To capture this behavior, the model presented utilizes principles of virtual folding to analyze and predict the kinematics of the bistable origami building blocks. Virtual fold approximates panel bending by hinged, rigid panels, which facilitates the development of a kinematic solution via traditional rigid-plate analysis. As such, the kinetics and stability of the structures are investigated by assigning suitable torsional springs’ constants to the fold lines. The results presented demonstrate the effect of fold-pattern geometries on the chirality (i.e. the rotational direction that results in expansion of the structure), and snapping behavior of the bi-stable origami structure. The crawling robot is presented as a case study for the use of this origami structure in various locomotion applications. The robot is comprised of two nested origami ‘building blocks’ with opposite chirality, such that their actuations are coupled rotationally. A servo motor is used to rotationally actuate the expansion and contraction of both the internal and external origami structures to achieve locomotion. Inclined barbs that extrude from the edges of the polygonal base engage with the ground surface, thus constraining the expansion or contraction to forward locomotion, as desired. The robot fabrication methods are presented and results from experiments performed on various surfaces are also discussed.
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Sa´nchez, Mauricio A., William H. Sutton, and Carlos A. Sa´nchez. "Simulations of Thermal Performance for One- and Two-Dimensional Insulation and Aluminum Foil Fire Barriers." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49265.

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Nonbearing walls made of concrete frequently include one or two-dimensional gaps between sections to allow the concrete exert expansion or contraction due to temperature transients. These section gaps require the use of a thermal fire barrier to stop a fire from spreading during a period of time. In some applications, such as seismic structures, fire barriers are large and form substructures and partial enclosures. These type of fire barriers are often manufactured by layering alternating blankets of ceramic fiber insulation with bounding thin metallic foil sheets. In this case, the barrier must meet the specifications and effectiveness given by the ASTM standard E-119. This effectiveness is determined by the requirement of maintaining structural integrity by allowing some heat release while not permitting the fire flame to pass through. Little data is available on the thermal interaction of 2-D corners and splicing the layers for large barriers. It is expected that spatial and angular effects might either degrade performance or even cause “hot spots” in a barrier wall. Therefore, a numerical simulation of the barrier is accomplished by utilizing the spectral/gray and directional/modeled data of each one of the components and by taking into account two common geometrical building shapes. This simulation analysis is done by coupling of the discrete ordinates method in radiation heat transfer and the energy equation to previously published thermophysical experimental data used as a validation of the properties for fire barrier materials. Some of the effects of directional and surface properties and radiative heat transfer in fire barrier materials have been included in the numerical model. The Fluent®-based numerical model is able to match thermal performance of previous test systems. Initial calculations suggest that a fire barrier consisting of a 2D corner geometry exposed to a fire from either side would be thermally less robust than a slab of the same characteristic aspect ratio. This approximation has shown a preferential orientation for the barrier to be positioned when a fire or other high energy source is postulated.
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