赤泥改性低品质粉煤灰混凝土性能的研究  

Study on properties of modified low-quality fly ash concrete with red mud

作　　者：温超凯 祝云 刘其彬 徐国栋 陈景 WEN Chaokai;ZHU Yun;LIU Qibin;XU Guodong;CHEN Jing(China West Construction Southwest Group Co. Ltd.,Chengdu 610052,China)

机构地区：[1]中建西部建设西南有限公司,四川成都610052

出　　处：《新型建筑材料》2019年第1期53-55,共3页New Building Materials

摘　　要：通过引入赤泥作为低品质粉煤灰改性剂,对低品质粉煤灰在混凝土中的应用进行了研究。试验结果表明:赤泥作为改性剂取代50%低品质粉煤灰时,C30和C60混凝土相对未掺入赤泥时混凝土的28 d抗压强度分别提高了10.6%和6.4%,基本不影响混凝土的静压弹性模量;相对未掺入赤泥的C30和C60混凝土28 d氯离子渗透系数分别降低了10.8%和11.8%,56 d氯离子渗透系数分别降低了12.8%和19.8%,并可以提高混凝土的抗碳化性能。The application of low-quality fly ash in concrete was studied by introducing red mud as a low-quality fly ash modifier. The test results show that when red mud is used as a modifier to replace 50% of low-quality fly ash,the 28 d compressive strength of C30 and C60 concrete increased by 10.6% and 6.4% compared with that of C30 and C60 concrete without red mud,and it without affecting the static modulus of elasticity. The chloride ion permeability coefficient of C30 and C60 concrete mixed with red mud decreased by 10.8% and 11.8% respectively after 28 d,and decreased by 12.8% and 19.8% respectively after 56 d compared with that of C30 and C60 concrete without red mud,and the carbonization performance of concrete could be improved.

关 键 词：赤泥 低品质粉煤灰 抗渗性能 碳化性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]