Effect of pore water saturation on the supercritical carbonation of cementitious materials

IF 3.9 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2025-08-05 DOI:10.1617/s11527-025-02740-8

Hao Bao, Ruyu Wang, Yahui Yang, Qing Wang, Gang Xu, Mohamed Saafi, Jianqiao Ye

{"title":"Effect of pore water saturation on the supercritical carbonation of cementitious materials","authors":"Hao Bao, Ruyu Wang, Yahui Yang, Qing Wang, Gang Xu, Mohamed Saafi, Jianqiao Ye","doi":"10.1617/s11527-025-02740-8","DOIUrl":null,"url":null,"abstract":"<div><p>The optimization of pore water saturation is essential to improve the supercritical carbonation efficiency of cementitious materials. In this study, a control method was developed to adjust the pore water saturation of cementitious materials to predetermined target values, thereby achieving a uniform distribution of pore water within the specimens. Based on this approach, a systematic supercritical carbonation test was conducted, the effects of pore water saturation and water-cement ratio on carbonation efficiency was researched by measuring carbonation depth, which reaches its maximum at a pore water saturation of 0.50. The effect of pore water saturation on the supercritical carbonation depth was clarified. Additionally, a novel method was proposed to determine the Ca(OH)<sub>2</sub> and C–S–H contents of cementitious materials before carbonation using inverse derivation from the differences in thermogravimetric analysis (TGA) results. Furthermore, microscopic techniques, including scanning electron microscopy (SEM), were employed to investigate the mechanisms of supercritical carbonation in cementitious materials under different pore water saturation levels. The influence of pore water saturation on the carbonation process was thereby elucidated.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 6","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials and Structures","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1617/s11527-025-02740-8","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

The optimization of pore water saturation is essential to improve the supercritical carbonation efficiency of cementitious materials. In this study, a control method was developed to adjust the pore water saturation of cementitious materials to predetermined target values, thereby achieving a uniform distribution of pore water within the specimens. Based on this approach, a systematic supercritical carbonation test was conducted, the effects of pore water saturation and water-cement ratio on carbonation efficiency was researched by measuring carbonation depth, which reaches its maximum at a pore water saturation of 0.50. The effect of pore water saturation on the supercritical carbonation depth was clarified. Additionally, a novel method was proposed to determine the Ca(OH)₂ and C–S–H contents of cementitious materials before carbonation using inverse derivation from the differences in thermogravimetric analysis (TGA) results. Furthermore, microscopic techniques, including scanning electron microscopy (SEM), were employed to investigate the mechanisms of supercritical carbonation in cementitious materials under different pore water saturation levels. The influence of pore water saturation on the carbonation process was thereby elucidated.

查看原文本刊更多论文

孔隙水饱和度对胶凝材料超临界碳酸化的影响

孔隙水饱和度的优化是提高胶凝材料超临界碳化效率的关键。本研究开发了一种控制方法，将胶凝材料的孔隙水饱和度调整到预定目标值，从而实现孔隙水在试件内的均匀分布。在此基础上，进行了系统的超临界碳化试验，通过测量碳化深度，研究了孔隙水饱和度和水灰比对碳化效率的影响，在孔隙水饱和度为0.50时达到最大。阐明了孔隙水饱和度对超临界碳酸化深度的影响。此外，本文还提出了一种利用热重分析（TGA）结果的差异反导法测定碳化前胶凝材料中Ca(OH)2和C-S-H含量的新方法。此外，采用扫描电镜等显微技术研究了不同孔隙水饱和度下胶凝材料的超临界碳化机理。从而阐明孔隙水饱和度对碳酸化过程的影响。

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

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.