ELECTROMECHANICAL PROPERTIES OF SELF-SENSING CEMENT PASTES POLARIZED WHILE FRESH

Q3 Engineering

Journal of Applied Engineering Science Pub Date : 2023-01-13 DOI:10.5937/jaes0-40435

Mohammad Al-Qaralleh

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引用次数: 0

Abstract

This work investigates the bulk resistivity, and the stress-strain relationship of polarized cement paste as indicators of its electromechanical properties. The polarizing of the cement paste specimens was achieved by applying a uniform direct current (DC) electric field through the fresh cement paste for 24 hours. A total of 24 specimens were prepared for this study, 7 of them were not cured under the effect of the DC electric field to serve as reference. 3 different electrical field values were utilized in this experiment, namely: 100 V.m-1, 200 V.m-1, and 500 V.m-1. 2 types of water were used for mixing the cement paste, namely: tap (T), and deionized (DI). The bulk resistivity values were measured in the direction parallel to the polarization, and the two other directions perpendicular to the polarization. The T water specimens were tested under uniaxial compression on the axis of polarization. The results show that the bulk resistivity of the specimens was increased as the curing electrical field increased. Mixing with T water also increased the bulk resistivity when compared to mixing with DI water. Polarizing the fresh cement paste has a significant effect on its mechanical properties such that the ultimate compressive strength decreased by 50%, and the failure strain increased by 500%. In addition, the polarized specimens showed some changes in its morphology when compared with the reference.

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自感水泥浆在新鲜时极化的机电特性

本文研究了极化水泥浆体的体积电阻率和应力应变关系作为其机电性能的指标。在新鲜的水泥浆体上施加均匀的直流电场24小时，实现了水泥浆体试样的极化。本研究共制备了24个试件，其中7个试件在直流电场作用下未固化，作为参考。本实验采用3种不同的电场值，分别为:100 vm -1、200 vm -1和500 vm -1。水泥浆混合使用2种水，即自来水(T)和去离子水(DI)。在平行于极化方向和垂直于极化方向测量体电阻率值。水样在极化轴上进行单轴压缩试验。结果表明:试件的体电阻率随固化电场的增大而增大;与与DI水混合相比，与T水混合也增加了体电阻率。极化对鲜水泥浆体的力学性能有显著影响，其极限抗压强度降低50%，破坏应变增加500%。此外，极化后的样品形貌与参考样品相比也有一定的变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Engineering Science Engineering-Engineering (all)

CiteScore

2.00

自引率

0.00%

发文量

122

审稿时长

12 weeks

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