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基于纳米压痕的水化硅酸钙断裂韧度测试与计算方法
作者:江俊达1 沈吉云2 侯东伟1 
单位:(1. 上海交通大学土木工程系 上海 200240 2. 中国石油集团工程技术研究院有限公司 北京 102206) 
关键词:纳米压痕 水化硅酸钙 断裂韧度 反卷积分析 
分类号:TU528
出版年,卷(期):页码:2018,46(8):1067-1073
DOI:
摘要:
水泥基材料的损伤破坏大多起始于微观开裂,因此其微观各相的断裂性能是此类材料的一项基础力学参数,然而到目前为止尚不能被合理测定。采用纳米压痕试验,测量了微观稳态开裂条件下水泥净浆微观各相的荷载-压入深度曲线,并基于能量分析法和断裂力学理论建立了微观断裂韧度的计算方法。通过点阵压痕试验和反卷积分析,计算了水泥基材料微观各相的断裂韧度,其中低密度与高密度水化硅酸钙的断裂韧度分别为(0.541±0.075) MPa·m1/2和(0.658±0.042) MPa·m1/2。
 
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