{"title":"机械活化下碱活化海相粘土的反应动力学及热力学模型","authors":"Ziyang Li , Jianhang Feng , Subhasis Pradhan , Shaohua Chu , Shunzhi Qian","doi":"10.1016/j.cemconcomp.2025.106115","DOIUrl":null,"url":null,"abstract":"<div><div>A clinker-free, one-part alkali-activated materials (AAM) using calcined marine clay (CMC) and Ca(OH)<sub>2</sub> (CH) was developed in this study. The influence of mechanical activation on the mechanical properties, morphology, and the microstructure of one-part AAM was explored. Chemical dissolution test elucidates the relationship between reacted SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> content, CH content, and pH values throughout the reaction process. Leveraging these experimental and statistical analysis results, a novel quantitative study on the kinetics of alkali activation process and the impact of milling on one-part AAM was conducted through thermodynamic modeling. CH dissolution-controlled reaction kinetics was revealed through experimental and modeling equilibrium comparisons. It demonstrates that the co-milling of CMC and CH can facilitate the alkali activation by synergistically improving the reacted CaO, SiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> content via accelerated dissolution of CH and CMC. This research advances understanding for one-part AAM design by optimization of precursor/activator content and mechanical activation time via experimental and modeling approaches.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"162 ","pages":"Article 106115"},"PeriodicalIF":13.1000,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Reaction kinetics and thermodynamic modeling of alkali-activated calcined marine clay with mechanical activation\",\"authors\":\"Ziyang Li , Jianhang Feng , Subhasis Pradhan , Shaohua Chu , Shunzhi Qian\",\"doi\":\"10.1016/j.cemconcomp.2025.106115\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A clinker-free, one-part alkali-activated materials (AAM) using calcined marine clay (CMC) and Ca(OH)<sub>2</sub> (CH) was developed in this study. The influence of mechanical activation on the mechanical properties, morphology, and the microstructure of one-part AAM was explored. Chemical dissolution test elucidates the relationship between reacted SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> content, CH content, and pH values throughout the reaction process. Leveraging these experimental and statistical analysis results, a novel quantitative study on the kinetics of alkali activation process and the impact of milling on one-part AAM was conducted through thermodynamic modeling. CH dissolution-controlled reaction kinetics was revealed through experimental and modeling equilibrium comparisons. It demonstrates that the co-milling of CMC and CH can facilitate the alkali activation by synergistically improving the reacted CaO, SiO<sub>2</sub>, and Al<sub>2</sub>O<sub>3</sub> content via accelerated dissolution of CH and CMC. This research advances understanding for one-part AAM design by optimization of precursor/activator content and mechanical activation time via experimental and modeling approaches.</div></div>\",\"PeriodicalId\":9865,\"journal\":{\"name\":\"Cement & concrete composites\",\"volume\":\"162 \",\"pages\":\"Article 106115\"},\"PeriodicalIF\":13.1000,\"publicationDate\":\"2025-05-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cement & concrete composites\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0958946525001970\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cement & concrete composites","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0958946525001970","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}
Reaction kinetics and thermodynamic modeling of alkali-activated calcined marine clay with mechanical activation
A clinker-free, one-part alkali-activated materials (AAM) using calcined marine clay (CMC) and Ca(OH)2 (CH) was developed in this study. The influence of mechanical activation on the mechanical properties, morphology, and the microstructure of one-part AAM was explored. Chemical dissolution test elucidates the relationship between reacted SiO2/Al2O3 content, CH content, and pH values throughout the reaction process. Leveraging these experimental and statistical analysis results, a novel quantitative study on the kinetics of alkali activation process and the impact of milling on one-part AAM was conducted through thermodynamic modeling. CH dissolution-controlled reaction kinetics was revealed through experimental and modeling equilibrium comparisons. It demonstrates that the co-milling of CMC and CH can facilitate the alkali activation by synergistically improving the reacted CaO, SiO2, and Al2O3 content via accelerated dissolution of CH and CMC. This research advances understanding for one-part AAM design by optimization of precursor/activator content and mechanical activation time via experimental and modeling approaches.
期刊介绍:
Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.