赤泥改性低品质粉煤灰混凝土性能的研究

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。

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

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.