热处理对聚合物改性纤维增韧水泥基复合材料物理力学性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (2): 392-400.

所属专题：水泥混凝土

热处理对聚合物改性纤维增韧水泥基复合材料物理力学性能的影响

周建伟, 余保英, 孔亚宁, 杨文, 程宝军

中建西部建设建材科学研究院有限公司,成都 610094

收稿日期:2020-09-21 修回日期:2020-10-13 出版日期:2021-02-15 发布日期:2021-03-10
通讯作者: 程宝军,工程师。E-mail:20120949@cqu.edu.cn
作者简介:周建伟(1993—),男,工程师。主要从事先进水泥基材料研发工作。E-mail:zhoujianwei1@cscec.com
基金资助:
国家重点研发计划“固废资源化”重点专项(2019YFC1907200);中国住房和城乡建设部(K2019248);中建股份科技研发计划(CSCEC-2019-Z-24);中建西部建设科技研发计划(ZJXJ-2019-15)

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

ZHOU Jianwei, YU Baoying, KONG Yaning, YANG Wen, CHENG Baojun

China West Construction Academy of Building Materials Co., Ltd., Chengdu 610094, China

Received:2020-09-21 Revised:2020-10-13 Online:2021-02-15 Published:2021-03-10

摘要/Abstract

摘要： 采用环氧乳液、乳胶粉制备了聚合物改性纤维增韧水泥基复合材料,研究了200 ℃、400 ℃、600 ℃、800 ℃热处理对材料物理力学性能的影响。结果表明:掺加聚合物可以改善试样的高温体积稳定性,使得试样在800 ℃高温下热处理时不发生爆裂;室温冷却条件下,聚合物使得材料峰值残余强度对应的温度由400℃降低至200 ℃,而在水冷却条件下,试样的残余强度随着热处理温度的升高持续降低,800 ℃热处理后聚合物改性试样在水冷却时溃散;聚合物分解在试样内部形成的交联孔道,改善了试样热处理后的孔结构,延缓了高温热处理对试样力学性能的劣化速率。

关键词: 热处理, 聚合物, 纤维增韧水泥基材料, 基本物理性能, 力学性能, 劣化

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

中图分类号:

TQ178

周建伟, 余保英, 孔亚宁, 杨文, 程宝军. 热处理对聚合物改性纤维增韧水泥基复合材料物理力学性能的影响[J]. 硅酸盐通报, 2021, 40(2): 392-400.

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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热处理对聚合物改性纤维增韧水泥基复合材料物理力学性能的影响

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

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