High efficiency preparation of superfine steel slag particles and the effects on hydration of Portland cement

IF 6.5 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Case Studies in Construction Materials Pub Date : 2025-05-27 DOI:10.1016/j.cscm.2025.e04839

Zhengqi Zheng , Yingbin Wang , Hongbo Tan , Xingyang He , Ying Su , Yubo Li

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Abstract

The promotion of hydration and high early strength in concrete holds vital significance for production efficiency of prefabricated concrete. Currently, how to prepare inexpensive early strength accelerators for component concrete is a current research hotspot. In light of the aforementioned objectives, superfine steel slag (SSS) with median size of 935 nm was produced by wet-milling technology in the research. The properties of SSS and its effects on paste/mortar were comprehensively investigated. Relevant data analysis confirmed that the phase composition of SSS was altered and the dissolution of ions was promoted due to hydration reaction. The 12 h compressive strength of the cement-based sample containing 8 % SSS rose from 5.2 MPa of the blank group to 18.5 MPa, with an increase of 256 %. The incorporation of SSS was found to promote the hydration rate and the growth of hydration products, as verified by hydration heat, XRD, and TG tests. These effects were attributed to the nucleation induction effect and the high-alkalinity liquid phase environment provided by SSS. This research provided a novel technical solution for the high-value-added utilization of steel slag in prefabricated concrete.

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超细钢渣颗粒的高效制备及其对硅酸盐水泥水化性能的影响

促进混凝土的水化和高早强对预制混凝土的生产效率具有重要意义。目前，如何制备廉价的组份混凝土早强促进剂是当前的研究热点。针对上述目标，本研究采用湿磨技术制备了中值粒径为935 nm的超细钢渣（SSS）。全面研究了SSS的性能及其对膏体/砂浆的影响。相关数据分析证实，水化反应改变了SSS的物相组成，促进了离子的溶解。含8 % SSS的水泥基试样12 h抗压强度由空白组的5.2 MPa提高到18.5 MPa，提高了256 %。通过水化热、XRD和TG测试证实，SSS的加入促进了水化速率和水化产物的生长。这些影响主要归因于SSS的成核诱导效应和高碱度的液相环境。本研究为钢渣在预制混凝土中的高附加值利用提供了新的技术解决方案。

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

Case Studies in Construction Materials Multiple-

CiteScore

7.60

自引率

19.40%

发文量

842

审稿时长

63 days

期刊介绍： Case Studies in Construction Materials provides a forum for the rapid publication of short, structured Case Studies on construction materials. In addition, the journal also publishes related Short Communications, Full length research article and Comprehensive review papers (by invitation). The journal will provide an essential compendium of case studies for practicing engineers, designers, researchers and other practitioners who are interested in all aspects construction materials. The journal will publish new and novel case studies, but will also provide a forum for the publication of high quality descriptions of classic construction material problems and solutions.