粉煤灰和炉渣对碱激发镍渣胶凝材料流动度和强度的影响

Effect of Fly Ash and Incineration Slag on the Fluidity and Strength of Alkali-activated Nickel Slag Cementitious Material

在NaOH及水玻璃(WG)两种碱激发剂下,研究了粉煤灰及炉渣对碱激发镍渣-粉煤灰-炉渣胶凝材料(ANC-FI)流动度及强度的影响,并通过XRD和IR揭示其机理。结果表明,当粉煤灰及炉渣总掺量为30%(等质量取代镍渣)时,随着炉渣掺量的增加(即粉煤灰掺量降低),ANC-FI的标准稠度用水量增加,凝结时间延长,砂浆流动度降低;ANC-FI抗折强度和抗压强度均随着炉渣掺量的增加呈先增大后减小的趋势,最佳掺量为粉煤灰和炉渣各取代15%的镍渣。

The effects of fly ash and incineration slag on the fluidity and strength of alkali-activated nickel slag-fly ash-incineration slag cementitious material(ANC-FI)with NaOH or water glass(WG)as activators were studied,and the mechanism was revealed by XRD and IR.The results show that when the nickel slag is replaced by 30%of fly ash and incineration slag,with the increase of the incineration slag content(i.e.,the amount of fly ash is reduced),the standard consistency water consumption of ANC-FI is increased,the setting time is prolonged and the fluidity of ANC-FI is reduced.The flexural strength and compressive strength of ANC-FI increase first and then decrease with the increase of incineration slag content,and when the nickel slag is replaced by 15%fly ash and 15%incineration slag respectively,the optimum ANC-FI can be obtained.