The reactive products and reactivity of modified red mud and ground granulated blast furnace slag at different alkalinities

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2022-09-05 DOI:10.1016/j.conbuildmat.2022.128471

Yueyang Hu , Xuehong Ren , Jiayuan Ye , Zhengbin Luan , Wensheng Zhang

{"title":"The reactive products and reactivity of modified red mud and ground granulated blast furnace slag at different alkalinities","authors":"Yueyang Hu , Xuehong Ren , Jiayuan Ye , Zhengbin Luan , Wensheng Zhang","doi":"10.1016/j.conbuildmat.2022.128471","DOIUrl":null,"url":null,"abstract":"<div><p>Supplementary cementing materials are widely used for cement and concrete. In this study, red mud was modified as a supplementary cementing material. The composition and activity of modified red mud are reported. The reaction products were analysed by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG) and scanning electron microscopy (SEM). The obtained results show that red mud can be modified to glass with activity, and the composition of MRM determines the formation of glass and activity. The dissolution rate of MRM versus time increases with pH in NaOH solutions. The reaction products of MRM pastes in pH = 14 were C<sub>2</sub>ASH<sub>8</sub> and C-S-H. Compared to ground granulated blast furnace slag, the activity of MRM is lower. This is probably attributed to the specific surface area, the content of Ca and the absence of sulfate in glass. The results can be useful for industrial application of MRM.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"346 ","pages":"Article 128471"},"PeriodicalIF":7.4000,"publicationDate":"2022-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061822021316","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: 4

Abstract

Supplementary cementing materials are widely used for cement and concrete. In this study, red mud was modified as a supplementary cementing material. The composition and activity of modified red mud are reported. The reaction products were analysed by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG) and scanning electron microscopy (SEM). The obtained results show that red mud can be modified to glass with activity, and the composition of MRM determines the formation of glass and activity. The dissolution rate of MRM versus time increases with pH in NaOH solutions. The reaction products of MRM pastes in pH = 14 were C₂ASH₈ and C-S-H. Compared to ground granulated blast furnace slag, the activity of MRM is lower. This is probably attributed to the specific surface area, the content of Ca and the absence of sulfate in glass. The results can be useful for industrial application of MRM.

查看原文本刊更多论文

改性赤泥和磨细高炉矿渣在不同碱度下的反应产物和反应活性

补充胶凝材料广泛应用于水泥和混凝土中。本研究对赤泥进行了改性，作为辅助固井材料。报道了改性赤泥的组成和活性。采用x射线粉末衍射(XRD)、傅里叶红外光谱(FTIR)、热重分析(TG)和扫描电镜(SEM)对反应产物进行了分析。结果表明，赤泥可以被改性为具有活性的玻璃，而MRM的组成决定了玻璃的形成和活性。MRM在NaOH溶液中的溶解速率随时间的增加而增加。在pH = 14条件下，MRM膏体的反应产物为C2ASH8和C-S-H。与磨碎的高炉渣相比，MRM的活性较低。这可能是由于玻璃的比表面积、钙的含量和硫酸盐的缺乏。研究结果对MRM的工业应用具有一定的指导意义。

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

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.