Thermal and Mechanical Properties of High-Performance Fiber-Reinforced Cementitious Composites after Exposure to High Temperatures
This paper investigates residual thermal and mechanical properties of high-performance fiber-reinforced cementitious composites (HPFRCCs) proportioned with high-volume fly ash after exposure to 200, 400, 600, and 800 °C. The investigated thermal and mechanical properties include the thermal conductivity, specific heat, compressive strength, tensile strength, tensile ductility, and density. The effects of five mix proportioning variables on the material properties are evaluated, which include the water-to-binder ratio (0.24-0.36 by mass), sand-to-binder ratio (0.36-0.66 by mass), fly ash content (60%-75% by mass), polyvinyl alcohol fiber content (1.5%-2.2% by volume), and superplasticizer content (0.10%-0.15% by mass). Experimental results reveal significant dependence of the residual thermal and mechanical properties on temperature and the mix proportion, which can be attributed to a series of chemical and physical reactions that occur at elevated temperatures. This study can facilitate optimization of mix proportions of HPFRCCs for enhanced thermal and mechanical performance in fire or high temperature applications.
X. Li et al., "Thermal and Mechanical Properties of High-Performance Fiber-Reinforced Cementitious Composites after Exposure to High Temperatures," Construction and Building Materials, vol. 157, pp. 829-838, Elsevier Ltd, Dec 2017.
The definitive version is available at https://doi.org/10.1016/j.conbuildmat.2017.09.125
Civil, Architectural and Environmental Engineering
Keywords and Phrases
High-performance fiber-reinforced cementitious composites (HPFRCCs); High temperature; Thermal properties; Mechanical properties; Mix proportions
International Standard Serial Number (ISSN)
Article - Journal
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