矿化养护FRCC碳吸收能力和抗折性能评价  

Evaluation of carbon absorption capacity and fracture resistance of FRCC in mineralization curing

作　　者：林丽君 薛昕[1] 傅爱 LIN Lijun;XUE Xin;FU Ai(School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学建筑与土木工程学院,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2024年第6期1142-1150,共9页Journal of Xiamen University：Natural Science

基　　金：福建省自然科学基金(2022J01010);厦门市交通基础设施智能管养工程技术研究中心开放基金(TCIMI201804)。

摘　　要：[目的]研究CO_(2)矿化养护技术在纤维增强水泥基复合材料(FRCC)中的应用,探讨不同矿化养护时间和试件厚度对FRCC的碳吸收能力及力学性能的影响.[方法]通过改进的质量增益法评估了FRCC试件的碳吸收能力,并利用抗折试验分析了其力学性能的发展趋势.[结果]研究结果表明,矿化养护不仅显著提高了FRCC的早期强度,还实现了有效的碳吸收,且对后期强度无负面影响.碳吸收量随着养护时间的增加而提升,但综合考虑强度影响,成型18 h后进行4 h矿化的养护效果最佳.[结论]CO_(2)矿化养护技术在降低碳排放和提高FRCC的早期强度方面表现出显著优势,具备广泛的应用前景.[Objective]Investigating the application of CO_(2)mineralization curing technology in fiber reinforced cement-based composites(FRCC),we aim to explore impacts of various mineralization curing durations and specimen thicknesses on the carbon absorption capacity and mechanical properties of FRCC.[Methods]The carbon absorption capacity of FRCC specimens was evaluated by using the improved mass gain method,and the development trend of mechanical properties of FRCC specimens was analyzed by performing bending tests.[Results]Results show that CO_(2)mineralization curing significantly enhances the early strength of FRCC and effectively promotes carbon absorption without negatively impacting the following later strength.The carbon sequestration capacity increases with the duration of mineralization curing.However,in consideration of the impact on strength comprehensively,the curing regimen is optimized as 4 hours of mineralization curing after 18 hours of specimen formation.[Conclusion]The CO_(2) mineralization curing technology provides significant advantages in reducing carbon emissions and improving the early strength of FRCC.This technology demonstrates its substantial potential for widespread application.

关 键 词：碳捕集 碳利用 碳封存 矿化养护 纤维增强水泥基复合材料(FRCC) 碳吸收 抗折性能 

分 类 号：TU528[建筑科学—建筑技术科学] X51[环境科学与工程—环境工程]