{"title":"Enhanced carbonation performance of rice husk ash blended cement-based composites through in-situ CO2 mixing","authors":"Donggue Lee , Won Kyung Kim , Juhyuk Moon","doi":"10.1016/j.cemconcomp.2025.106040","DOIUrl":null,"url":null,"abstract":"<div><div>The carbon capture, utilization, and storage (CCUS) technology has garnered significant attention in achieving carbon neutrality including construction sector. This study investigates the hydration and carbonation mechanisms of cement-based samples subjected to early mineral carbonation in a CO<sub>2</sub>-rich environment, especially by incorporating rice husk ash (RHA). The in-situ CO<sub>2</sub> mixing of cement samples was conducted under sealed conditions for 60 min at a CO<sub>2</sub> concentration of 10 vol%. The effects of various RHA addition ratios on the early-stage carbonation reaction were examined. The results demonstrated that increasing the RHA content enhanced CO<sub>2</sub> sequestration within the porous structure of RHA, facilitating the formation of various carbonates. This carbonate formation contributed to the improvements in initial strength development and CO<sub>2</sub> sequestration. Meanwhile, during the sealed curing period, a significant transformation of CaCO<sub>3</sub> into monocarboaluminate was observed. These findings suggest the potential for adopting RHA and in-situ CO<sub>2</sub> mixing as an environmentally sustainable and efficient strategy for CO<sub>2</sub> sequestration using cement-based materials.</div></div>","PeriodicalId":9865,"journal":{"name":"Cement & concrete composites","volume":"160 ","pages":"Article 106040"},"PeriodicalIF":10.8000,"publicationDate":"2025-03-12","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/S0958946525001222","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: 0
Abstract
The carbon capture, utilization, and storage (CCUS) technology has garnered significant attention in achieving carbon neutrality including construction sector. This study investigates the hydration and carbonation mechanisms of cement-based samples subjected to early mineral carbonation in a CO2-rich environment, especially by incorporating rice husk ash (RHA). The in-situ CO2 mixing of cement samples was conducted under sealed conditions for 60 min at a CO2 concentration of 10 vol%. The effects of various RHA addition ratios on the early-stage carbonation reaction were examined. The results demonstrated that increasing the RHA content enhanced CO2 sequestration within the porous structure of RHA, facilitating the formation of various carbonates. This carbonate formation contributed to the improvements in initial strength development and CO2 sequestration. Meanwhile, during the sealed curing period, a significant transformation of CaCO3 into monocarboaluminate was observed. These findings suggest the potential for adopting RHA and in-situ CO2 mixing as an environmentally sustainable and efficient strategy for CO2 sequestration using cement-based materials.
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.