花岗岩石粉对水工混凝土抗碳化性能的影响  

The Effect of Granite Powder on the Carbonation Resistance of Hydraulic Concrete

作　　者：范华峰 段光林 翟盛通 刘福胜[1] 张坤强[1] FAN Hua-feng;DUAN Guang-lin;ZHAI Sheng-tong;LIU Fu-sheng;ZHANG Kun-qiang(College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian 271000, Shandong Province, China;Taian Construction Engineering Quality Supervision Station, Taian 271000, Shandong Province, China)

机构地区：[1]山东农业大学水利土木工程学院,山东泰安271000 [2]泰安市建筑工程质量监督站,山东泰安271000

出　　处：《中国农村水利水电》2020年第9期236-241,247,共7页China Rural Water and Hydropower

基　　金：山东省自然基金项目(ZR2018PEE027);国家科技支撑计划项目(2015BA07B05)。

摘　　要：通过快速碳化试验、压汞试验,研究花岗岩石粉不同掺加方式、掺量及细度对水工混凝土抗碳化性能的影响规律,分析水工混凝土孔隙特征。结果表明:水工混凝土抗碳化性能随花岗岩石粉外掺掺量增加呈先升后降趋势,掺量为20%左右时最优;内掺掺量超过5%时,水工混凝土抗碳化性能逐渐劣化;花岗岩石粉细度较掺加方式及掺量对水工混凝土抗碳化性能的影响较小;掺加适量花岗岩石粉可改善水工混凝土孔隙结构,降低有害孔及多害孔贡献孔隙率。建议花岗岩石粉最佳掺量为外掺20%(细度0~150μm)、内掺5%(细度0~45μm)。The accelerated carbonation test and mercury intrusion porosimetry test are carried out to investigate the effect of different mixing methods,content and fineness of granite powder on the carbonation resistance of hydraulic concrete and analyze the pore characteristic of hydraulic concrete.The results show that the carbonation resistance of hydraulic concrete increases at first and then decreases with the increase in granite powder.And the carbonation resistance of hydraulic concrete is the best when 20%of granite powder is added.When the content of replacing cement with granite powder exceeds 5%,the carbonation resistance of hydraulic concrete will deteriorate gradually.Compared with the mixing method and content,the fineness of granite powder is not the main factor of affecting the carbonation resistance of hydraulic concrete.Externally adding or replacing cement with appropriate amount of granite powder can improve the pore structure of hydraulic concrete and reduce the contribution porosity of harmful pores.It is suggested that the best content of adding granite powder(fitness 0~150μm)is 20%and the best content of replacing cement with granite powder(fitness 0~45μm)is 5%.

关 键 词：花岗岩石粉 水工混凝土 抗碳化性能 掺量 孔隙特征 

分 类 号：TV431[水利工程—水工结构工程]