Novel typology of accelerated carbonation curing:using dry and pre-soaked biochar to tune carbon capture and mechanical properties of cementitious mortar

作     者：H.W.Kua S.M.H.Tan 

作者机构：Department of the Built EnvironmentCollege of Design and EngineeringNational University of SingaporeSingaporeSingapore 

出 版 物：《Biochar》 (生物炭（英文）)

年 卷 期：2023年第5卷第1期

页      面：621-640页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0401[教育学-教育学] 04[教育学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0706[理学-大气科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0901[农学-作物学] 

基　　金：Department of the Built Environment and College of Design and Engineering(E-471-00-0009-02) 

主　　题：Biochar Pre-soaked Carbonation effectiveness Carbonation efficiency Accelerated carbonation curing 

摘      要：One of the challenges of promoting accelerated carbonation curing(ACC)of concrete as a carbon sequestration strategy is ensuring that carbonation will not deteriorate mechanical *** study examined the mechanical strength,water sorptivity and carbonation efficiency of ten types of mortar containing dry or pre-soaked biochar subjected to internal and/or external *** results obtained enabled a typology of ACC to be proposed,in which the carbon dioxide absorption of mortar containing various types of CO_(2)-dosed biochar ranged between 0.022%and 0.068%per unit dosage *** particular,the mortar containing dry biochar dosed with carbon dioxide was the top candidate for concurrently increasing both compressive strength(54.9 MPa)and carbon dioxide absorption(0.055%per unit dosage hour).Mortar containing pre-soaked biochar dosed with carbon dioxide was identified as a strategy that achieved the highest carbonation efficiency(0.068%per unit dosage hour),but it also reduced compressive strength(45.1 MPa).Collectively,the proposed typology offers a useful overview of the different ways by which biochar can be used to tune ACC in mortar,according to any technical constraints and/or intended functions of the carbonated concrete components.