Microstructure and Mechanical Properties of High-Toughness Fiber-Reinforced Cementitious Composites after Exposure to Elevated Temperatures
作者： Qinghua Li , Xiang Gao , Shilang Xu , Yu Peng , Ye Fu
DOI: 10.1061/(ASCE)MT.1943-5533.0001647
关键词: Compressive strength 、 Flexural strength 、 Composite material 、 Microstructure 、 Cementitious composite 、 Fiber 、 Materials science 、 Pore size 、 Layer (electronics) 、 Toughness 、 General Materials Science 、 Mechanics of Materials 、 Civil and Structural Engineering 、 Building and Construction
摘要: AbstractThis study investigates the effect of high temperature on microstructure and mechanical properties high-toughness fiber-reinforced cementitious composites. Pore size distribution, microstructure, are tested after exposure to 20, 200, 400, 600, 800°C. The variation chemical compositions elevated temperatures leads color changes fibers matrix, which can be clearly verified from energy dispersive X-ray analysis (EDAX). Furthermore, pore composites decreases gradually at 200 400°C. Compressive strength varies consistently with showing that fire damage does not inevitably lead deterioration properties. However, residual flexural decrease significantly because melting PVA fiber. As a covering layer structures, exhibits excellent protection reinforced concrete columns.
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