Experimental Study On Acoustic Emission Characteristics of SAP Mortar Self-Healing Process

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Evaluation Pub Date : 2023-11-01 DOI:10.32548/2023.me-04359

Nairan Wang, Yan Wang, Yihui Su, Haitao Zhao

引用次数: 0

Abstract

Self-healing properties of super absorbent polymer (SAP) concrete can reduce the harmful effects of concrete cracking in structures. This study examines the self-healing process of mortars with different SAP content under dry and wet conditions through acoustic emission testing (AE) and elastic wave velocity testing. Findings indicate that the SAP mortar healing process has three stages: rapid water absorption, smooth water absorption, and drying. In a dry environment, increasing SAP content enhances AE activity, indicating internal crack self-healing via further hydration of unhydrated cement particles. In a wet environment, AE activity increases with increasing SAP content during the second healing cycle, indicating self-healing of the mortar matrix. These results suggest the use of SAP concrete could potentially mitigate future structural damage.

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SAP 砂浆自愈合过程的声发射特性实验研究

超强吸水聚合物（SAP）混凝土的自愈合特性可以减少结构中混凝土开裂的有害影响。本研究通过声发射测试（AE）和弹性波速测试，研究了不同 SAP 含量的砂浆在干湿条件下的自愈合过程。研究结果表明，SAP 砂浆的愈合过程分为三个阶段：快速吸水、平稳吸水和干燥。在干燥环境中，SAP 含量的增加会增强声发射活动，这表明内部裂缝会通过未水化水泥颗粒的进一步水化而自我愈合。在潮湿环境中，在第二个愈合周期中，随着 SAP 含量的增加，AE 活性也会增加，这表明砂浆基质具有自愈合能力。这些结果表明，使用 SAP 混凝土有可能减轻未来的结构损坏。

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

Materials Evaluation 工程技术-材料科学：表征与测试

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.