Enhancing piezoresistivity of cement sensor with supplementary materials and carbonation curing

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-02-08 DOI:10.1680/jadcr.23.00202

Daeik Jang, Jinho Bang, Haemin Jeon

引用次数: 0

Abstract

This study explores the fabrication of cement-based sensors blended with supplementary cementitious materials (SCM) using carbonation curing. The effects of SCM types (i.e. fly ash or slag) and curing conditions on CO2 uptake degree, compressive strength, electrical conductivity, and piezoresistive sensing capability were systematically examined. The results indicate that the inclusion of fly ash or slag enhances CO2 uptake degree. However, it is also found that the excessive carbonation curing negatively affects compressive strength. Electrical resistivity is increased after carbonation curing due to carbonation-induced hydrate formation disrupting CNT-based conductive networks. The piezoresistive sensing capability is influenced by binder types and curing conditions, with higher sensitivity observed in samples blended with fly ash.

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利用补充材料和碳化固化提高水泥传感器的压阻系数

本研究探讨了利用碳化固化法制造掺有辅助胶凝材料（SCM）的水泥基传感器。系统研究了 SCM 类型（即粉煤灰或矿渣）和固化条件对二氧化碳吸收率、抗压强度、电导率和压阻传感能力的影响。结果表明，加入粉煤灰或矿渣可提高二氧化碳吸收率。但同时也发现，过度碳化固化会对抗压强度产生负面影响。碳化固化后电阻率增加，这是由于碳化引起的水合物形成破坏了基于 CNT 的导电网络。压阻传感能力受粘合剂类型和固化条件的影响，与粉煤灰混合的样品灵敏度更高。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.