摘要(Abstract)：
采用裂缝开口显微观察、超声波脉冲速度测试以及超声波形分析方法,研究水与胶凝材料的质量比(简称水灰比)对水泥基材料裂缝自愈合性能的影响,借助热重分析、物相分析、微观形貌观察等手段,比较不同水灰比的砂浆试块裂缝内表面水化产物及自愈合产物的差异,评价不同水灰比的砂浆试块裂缝自愈合能力。结果表明:随着水灰比的增大,砂浆试块的自愈合能力明显改善,超声波恢复能力增强;水灰比较小的砂浆试块裂缝自愈合的机制是水泥矿物的继续水化,水灰比较大的砂浆试块裂缝自愈合的机制是碳酸钙沉积。
关键词(KeyWords)： 水泥基材料;裂缝自愈合;超声波;水化产物;碳化
基金项目(Foundation): 国家自然科学基金项目(51872120);; 国家重点研发计划项目(2017YFB0309905);; 国家高技术研究发展计划(863计划)项目(2015AA034701)
作者(Author): 陈帅帅,李敏,袁连旺,周宗辉
DOI: 10.13349/j.cnki.jdxbn.20210201.003
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