摘要
为了研究石灰石粉和含铝相辅助性胶凝材料的协同作用对混凝土抗碳化性能的影响,选取了两种含铝相辅助性胶凝材料和石灰石粉以不同比例取代水泥,并采用差热分析、XRD和压汞法测试了其水化产物和微观结构。研究结果表明,单掺石灰石粉降低了混凝土的抗碳化性能,当石灰石粉掺量约为10%时,混凝土的碳化深度最低。当复掺石灰石粉和含铝相辅助性胶凝材料时,两者反应生成了碳铝酸钙,增大了固相体积,优化了孔结构,它们的协同作用提高了混凝土的抗碳化性能。当石灰石粉掺量为5%~15%,粉煤灰掺量小于10%,或者矿粉掺量为10%~30%时,混凝土的碳化深度最低。
To investigate the impact of synergistic effect between limestone powder and supplementary cementitious materials containing aluminate phase on carbonation resistance of concrete,two kinds of supplementary cementitious materials containing aluminate phase and limestone powder were selected to replace cement in different proportion,and the hydration products and microstructure were measured by thermogravimetric analysis,XRD and mercury intrusion porosimetry.The results showed that incorporation of limestone powder reduce the carbonation resistance of concrete.The carbonation depth of concrete was minimal when the content of limestone powder was approximately 10%.However,when limestone powder and supplementary cementitious materials containing aluminate phase were mixed,they reacted to form calcium carboaluminate,which increase the volume of solid phase,optimize the pore structure,and their synergistic effect improved the carbonation resistance of concrete.When the limestone powder amount was 5%-15%,and the fly ash amount was less than 10%or the slag amount was 10%-30%,the carbonation depth of concrete was lowest.
作者
王德辉
史才军
贾煌飞
WANG Dehui;SHI Caijun;JIA Huangfei(College of Civil Engineering,Fuzhou University,Fuzhou 350116;College of Civil Engineering,Hunan University,Changsha 410082)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2018年第17期2986-2991,共6页
Materials Reports
基金
国家自然科学基金青年科学基金(51608187)
博士后基金(2017M612551)
关键词
石灰石粉
粉煤灰
矿粉
协同作用
抗碳化性能
limestone powder
fly ash
slag
synergistic effect
carbonation resistance
