应力自感知水泥基复合材料是在传统的水泥或砂浆中添加特定导电材料或纳米材料复合而成的具有压阻效应的材料.利用这类材料的电阻率与其自身压应力存在一定对应关系的特性,可以制成性能独特的应力自感知水泥基复合材料传感器.此类传感器因具有造价低、耐久性好、埋设工艺简单以及与混凝土材料相容性好等特性,有望成为混凝土结构长期健康监测的新一代传感装置.本文作者从原材料选择、搅拌工艺、电阻测试方法以及传感器测试系统等多方面综合评述了应力自感知水泥基复合材料的研究进展.同时指出,为促进其在工程中的应用,对碳纤维水泥石电阻率的离散性、稳定性以及多向约束受力下电阻率的变化曲线等问题都必须进一步深入研究.
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