任双倩1,赵世冉1,宋 心2,王 欢2,袁倩男1
任双倩,赵世冉,宋心,等.粉煤灰和矿粉对OPC-SAC基路面修补材料性能的影响[J].混凝土与水泥制品,2023(8):93-96,104.
REN S Q,ZHAO S R,SONG X,et al.Effect of fly ash and mineral powder on performance of OPC-SAC based pavement repair materials[J].China Concrete and Cement Products,2023(8):93-96,104.
粉煤灰和矿粉对OPC-SAC基路面修补材料性能的影响
任双倩1,赵世冉1,宋 心2,王 欢2,袁倩男1
任双倩,赵世冉,宋心,等.粉煤灰和矿粉对OPC-SAC基路面修补材料性能的影响[J].混凝土与水泥制品,2023(8):93-96,104.
REN S Q,ZHAO S R,SONG X,et al.Effect of fly ash and mineral powder on performance of OPC-SAC based pavement repair materials[J].China Concrete and Cement Products,2023(8):93-96,104.
摘 要:研究了m粉煤灰∶m矿粉(1∶0、2∶1、1∶1、1∶2、0∶1)对普通硅酸盐水泥-硫铝酸盐水泥(OPC-SAC)基路面修补材料凝结时间、流动度、抗压强度、拉伸黏结强度和水化放热行为的影响。结果表明:掺入粉煤灰和矿粉会降低OPC-SAC基路面修补材料的水化放热量和水化放热速率,延长凝结时间,增大流动度,降低抗压强度,提高拉伸黏结强度;随着矿物掺合料中矿粉占比的增大,OPC-SAC基路面修补材料的凝结时间延长,流动度、抗压强度和拉伸黏结强度均先增大后减小,最佳m粉煤灰∶m矿粉为1∶2。
Abstract: The effects of mfly ash∶mmineral powder (1∶0, 2∶1, 1∶1, 1∶2, 0∶1) on the setting time, fluidity, compressive strength, tensile bond strength and hydration exothermic behavior of ordinary Portland cement-sulphoaluminate cement(OPC-SAC) based pavement repair materials were studied. The results show that adding fly ash and mineral powder can reduce the hydration heat release and hydration heat release rate of OPC-SAC based pavement repair materials, extend the setting time, increase fluidity, reduce compressive strength, and improve tensile bond strength. As the content of mineral powder in the admixture increases, the setting time of OPC-SAC based pavement repair materials is prolonged, and the fluidity, compressive strength, and tensile bond strength first increase and then decrease. The optimal ratio of mfly ash∶mmineral powder is 1∶2.
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