Early-age hydration mechanism of geopolymer derived from calcined Bayer red mud through electrical resistivity method

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-07 DOI:10.1016/j.conbuildmat.2025.139922

Yan Ke , Junda Quan , Xingwu Li , Sha Liang , Huijie Hou , Jingping Hu , Ye Chen , Yibing Zuo , Yin Yang , Jiakuan Yang

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引用次数: 0

Abstract

The early-age reaction hydration mechanism of the geopolymer derived from calcined red mud (RM) and ground granulated blast furnace slag (GBFS) was investigated via electrical resistivity measuring. The geopolymerization process could be divided into four stages: the dissolution stage, the setting stage, the hardening acceleration stage, and the hardening deceleration stage, based on the characteristic points of differential electrical resistivity curves. A direct proportionality between the geopolymer setting time and the resistivity characteristic point time was established to obtain a correlation equation for the determination of Vicat setting time. A bivariate linear model to predict the 28-day compressive strength of geopolymer was established by taking 1-day compressive strength and 24-hour electrical resistivity as inputs, providing a shortcut to predict the 28-day compressive strength of the geopolymer.

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用电阻率法研究拜耳赤泥煅烧地聚合物的早期水化机理

采用电阻率法研究了煅烧赤泥（RM）与磨粒高炉渣（GBFS）制备的地聚合物的早期反应水化机理。根据差分电阻率曲线特征点，将地聚合过程分为溶解阶段、凝固阶段、硬化加速阶段和硬化减速阶段4个阶段。建立了地聚合物凝固时间与电阻率特征点时间成正比关系，得到了确定维卡特凝固时间的相关方程。以1天抗压强度和24小时电阻率为输入，建立了预测地聚合物28天抗压强度的二元线性模型，为预测地聚合物28天抗压强度提供了捷径。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.