Effect of Heat Treatment on Physical and Mechanical Properties of Polymer Modified Fiber Reinforced Cementitious Composites

Abstract

Abstract: Polymer modified fiber reinforced cementitious composites were prepared by epoxy emulsion and emulsion powder. The effects of heat treatment at 200 ℃, 400 ℃, 600 ℃ and 800 ℃ on the physical and mechanical properties of the composites were studied. Results show that high temperature volume stability of specimen is improved by adding polymer. There is no cracking of specimens with polymer during heat treatment at 800 ℃. The temperature corresponding to the peak value of residual strength decreases from 400 ℃ to 200 ℃ under the condition of air cooling. The residual strength of specimens decreases continuouslyas the temperature of the heat treatment increases under water cooling. The polymer modified fiber reinforced cementitious composites collapses during water cooling after heat treatment at 800 ℃. The cross-linking channels formed by polymer decomposition in the specimen improve the pore structure of heat-treated specimen, which delays the degradation rate of high temperature heat treatment on the properties of the sample.

Key words: heat treatment, polymer, fiber reinforced cementitious composite, basic physical property, mechanical property, deterioration

CLC Number:

TQ178

ZHOU Jianwei, YU Baoying, KONG Yaning, YANG Wen, CHENG Baojun. Effect of Heat Treatment on Physical and Mechanical Properties of Polymer Modified Fiber Reinforced Cementitious Composites[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(2): 392-400.

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