摘要
为了实现建材行业的“碳达峰、碳中和”目标,使用工业钙质原料和硅质原料在1350℃制备了一种低钙固碳胶凝材料,研究了不同CO_(2)浓度养护对低钙固碳胶凝材料碳化程度和碳化后性能的影响,并通过X射线衍射(XRD)、傅里叶红外光谱分析(FT-IR)、热重分析(TG)、扫描电子显微镜(SEM)、电子探针(EPMA)等测试手段进行了低钙固碳胶凝材料碳化后的产物分析、微观分析和机理分析。结果表明,随着CO_(2)浓度的提高,低钙固碳胶凝材料的碳化程度和抗压强度显著提高,当CO_(2)浓度为99.99%(体积分数)时,低钙固碳胶凝材料碳化8 h后的抗压强度为132.2 MPa,与CO_(2)浓度为25%时相比,抗压强度提高了260%。
In order to achieve the national strategic goals of“peak carbon dioxide emission and carbon neutrality”in the building materials industry,a type of low-calcium carbon sequestration cementitious materials(LC-CSCM)was prepared by calcining industrial calcareous and siliceous raw materials at 1350℃.The influences of different concentrations of CO_(2) on the carbonation degree and the carbonation hardening performance of LC-CSCM were investigated.XRD,FT-IR,TG,SEM and EPMA were used for the evolution of product analysis,microanalysis and mechanism analysis of carbonated LC-CSCM.The results show that with the increase of CO_(2) concentration,the carbonation degree and the carbonation hardening performance of LC-CSCM increase significantly.When the CO_(2) concentration is 99.99%(volume fraction),the compressive strength reaches 132.2 MPa after 8 h of LC-CSCM carbonation curing;compared with the concentration CO_(2) of 25%,the compressive strength increases by 260%.
作者
黎帅
周凤娇
谭新宇
张宾
林永权
陶从喜
黄明俊
LI Shuai;ZHOU Fengjiao;TAN Xinyu;ZHANG Bin;LIN Yongquan;TAO Congxi;HUANG Mingjun(School of Emergent Soft Matter,South China University of Technology,Guangzhou 510000,China;China Resources Cement Technology R&D Co.,Ltd.,Guangzhou 510000,China)
出处
《硅酸盐通报》
CAS
北大核心
2023年第9期3109-3116,共8页
Bulletin of the Chinese Ceramic Society
基金
中国科学技术协会青年托举人才工程项目(CRC-2022-K-17)
“十四五”国家重点研发计划(2021YFB3802001)。
关键词
低钙固碳胶凝材料
CO_(2)浓度
碳酸钙
碳化程度
抗压强度
low-calcium carbon sequestration cementitious material
carbon dioxide concentration
calcium carbonate
carbonation degree
compressive strength
