Magnesium cements and their carbonation curing:a state-of-the-art review  

作　　者：M.Aminul Haque Jian‑Guo Dai Xiao-Ling Zhao 

机构地区：[1]Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong,China

出　　处：《Low-carbon Materials and Green Construction》2024年第1期465-491,共27页低碳材料与绿色建造(英文)

基　　金：supported by The Hong Kong Polytechnic University through a University Financial Support for Awardees of Major Renowned Funding and Award Schemes awarded to the corresponding author.

摘　　要：The Portland cement(PC)production industry is a key contributor of CO_(2)emission.The demand of cement is mounting day by day due to the rapid infrastructure development in the world.Consequently,CO_(2)discharge from the construction sector is continuously increasing and accounts for about 8%of the total CO_(2)emission,which becomes a global concern nowadays.Wide applications of eco-friendly cements can significantly reduce the CO_(2)release.Therefore,use of magnesium cements(MCs)might be a promising solution to ease such concern.As a rapid hardening cement,MCs can be characterized as low-carbon due to their lower embodied energy and carbon storage ability during the service.This review mainly summarizes the findings of previous studies related to the carbonation performances of PC blended with magnesia and MCs products,and particularly,the influence of Accelerated carbonation curing(ACC)process on the properties of MCs and corresponding CO_(2)sequestration performance.The effects of ACC on mechanical strength,hydration and mineral carbonation mechanisms,pore structures,pore solution pH and thermal properties are discussed.The limitations of existing research are also discussed,which may provide the directions for future research and development of MC material products.波特兰水泥(PC)生产行业是二氧化碳排放的主要贡献者。由于基础设施的快速发展,水泥的需求日益增加。因此,建筑业的二氧化碳排放量持续增加,约占二氧化碳排放总量的8%,成为当今全球关注的问题。环保水泥的广泛应用显着减少CO_(2)排放。因此,使用镁水泥(MCs)可能是缓解这种担忧的一个有希望的解决方案。作为一种快硬水泥,MC因其较低的内含能源和使用期间的碳储存能力而具有低碳特征。本次综述主要总结了PC与氧化镁和MCs共混后的碳酸化性能,特别是加速碳酸化固化(ACC)过程对MC性能和相应CO_(2)封存的影响。讨论了ACC对机械强度、水合作用和矿物质碳化机制、孔隙结构、孔隙溶液pH值和热性能的影响。还指出了现有研究的局限性,这可能提供MC材料产品未来的研发方向。

关 键 词：CO_(2)emission Magnesium cement Accelerated carbonation Microstructural changes CO_(2)sequestration 

分 类 号：F42[经济管理—产业经济]