A new approach for constructing UHPC conductive pathways: Oriented deposition of conductive hydration products

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2025-02-10 DOI:10.1016/j.cemconres.2025.107827

Minjie Jia , Xiangyi Chen , Zhichao Xu , Juncheng Wen , Yingzi Yang , Kunyang Yu , Yushi Liu

{"title":"A new approach for constructing UHPC conductive pathways: Oriented deposition of conductive hydration products","authors":"Minjie Jia , Xiangyi Chen , Zhichao Xu , Juncheng Wen , Yingzi Yang , Kunyang Yu , Yushi Liu","doi":"10.1016/j.cemconres.2025.107827","DOIUrl":null,"url":null,"abstract":"<div><div>Regulating the resistivity of ultra-high-performance concrete (UHPC) infrastructure is crucial for endowing UHPC with intelligence and multifunctionality. In this study, we proposed a new approach to enhance the electrical conductivity of UHPC via high-temperature electric induction. When the temperature of electric-cured UHPC was heated to 90–130 °C, the resistivity dropped sharply. After electric curing, the resistivity of UHPC was significantly reduced from 8.7 MΩ·cm to 537.18 Ω·cm compared to that of steam-cured UHPC. It was confirmed that the tunneling effect and dielectric breakdown were the main reasons for the sudden resistivity drop during electric curing. Moreover, electrochemical impedance spectroscopy (EIS) and model experiments revealed the oriented deposition of new conductive products within the UHPC matrix. This approach also strengthened UHPC in 3 h comparable to 3-day steam curing of 90 °C. This work opened up a novel path in constructing effective conductive networks of cement-based materials.</div></div>","PeriodicalId":266,"journal":{"name":"Cement and Concrete Research","volume":"191 ","pages":"Article 107827"},"PeriodicalIF":10.9000,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement and Concrete Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0008884625000468","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Regulating the resistivity of ultra-high-performance concrete (UHPC) infrastructure is crucial for endowing UHPC with intelligence and multifunctionality. In this study, we proposed a new approach to enhance the electrical conductivity of UHPC via high-temperature electric induction. When the temperature of electric-cured UHPC was heated to 90–130 °C, the resistivity dropped sharply. After electric curing, the resistivity of UHPC was significantly reduced from 8.7 MΩ·cm to 537.18 Ω·cm compared to that of steam-cured UHPC. It was confirmed that the tunneling effect and dielectric breakdown were the main reasons for the sudden resistivity drop during electric curing. Moreover, electrochemical impedance spectroscopy (EIS) and model experiments revealed the oriented deposition of new conductive products within the UHPC matrix. This approach also strengthened UHPC in 3 h comparable to 3-day steam curing of 90 °C. This work opened up a novel path in constructing effective conductive networks of cement-based materials.

查看原文本刊更多论文

构建UHPC导电途径的新方法：导电水化产物定向沉积

调节超高性能混凝土（UHPC）基础设施的电阻率对于赋予其智能化和多功能性至关重要。在这项研究中，我们提出了一种通过高温电磁感应来提高UHPC导电性的新方法。当电固化UHPC加热到90 ~ 130℃时，其电阻率急剧下降。电固化后，UHPC的电阻率由8.7 MΩ·cm显著降低至537.18 Ω·cm。结果表明，隧穿效应和介质击穿是电固化过程中电阻率突然下降的主要原因。此外，电化学阻抗谱（EIS）和模型实验揭示了新型导电产物在UHPC基体中的定向沉积。与90°C的3天蒸汽固化相比，这种方法在3小时内也增强了UHPC。这项工作为构建水泥基材料的有效导电网络开辟了一条新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.