Eddy current-based nondestructive detection was first used for testing self-sensing cement paste in this study. The effects of three functional fillers and aging on self-sensing cement paste were observed. First, the plain mortar exhibited self-sensing ability at the earliest curing time, but its gage factor significantly decrease with ages. Second, among the three functional fillers that were studied - carbon fiber (CF), steel fiber (SF), and carbon black (CB) - the SF exhibited the highest gage factor. Third, the effect of ages on eddy current sensitivity is not obvious. The gage factor SF-reinforced specimens is high in different ages, while the gage of CF- and CB-reinforced specimens change little with ages. This study shows that eddy current-based nondestructive detection is feasible to detect stress and damage-induced variation of cement paste, and SF is the best filler to improve the self-sensing ability of cement paste.

在这项研究中，基于涡流的无损检测首次用于测试自感应水泥浆。观察了三种功能填料和老化对自感水泥浆体的影响。首先，普通砂浆在最早固化时间表现出自感应能力，但其应变系数随着年龄的增长而显着下降。其次，在研究的三种功能填料中——碳纤维 (CF)、钢纤维 (SF) 和炭黑 (CB)——SF 表现出最高的应变系数。第三，年龄对涡流灵敏度的影响不明显。SF 加固试件的应变系数在不同时期均较高，而CF 和CB 加固试件的应变系数随年龄变化不大。