将普通硅酸盐水泥(Ordinary Portland Cement,简称为P.O)和快硬硫铝酸盐水泥(Rapid Hardening Sul-phoaluminate Cement,简称为R.SAC)以不同比例混合,并掺入一定量的减水剂配制成自流平砂浆,通过测定砂浆在不同龄期的抗压强度和1440min内的电阻率,研究了这两种水泥的复合使用效果。结果表明,当快硬硫铝酸盐水泥的掺量从10%增加到90%时,砂浆抗压强度表现出明显的先降低后增大的变化趋势。随着掺量的增大,砂浆的初始电阻率也逐渐增大,水泥的早期水化逐渐加快;当掺量从60%增加到90%时,电阻率曲线开始出现峰值,并且峰值的出现时间也逐渐提前,此时砂浆的抗压强度也逐渐增大。 Ordinary Portland Cement (PO) and Rapid Hardening Sul-phoaluminate Cement (R.SAC) are mixed in different proportions and mixed with a certain amount of water reducing The agent was formulated as a self-leveling mortar. The compressive strength of the mortar at different ages and the resistivity within 1440 min were measured to study the composite effect of the two cements. The results show that the compressive strength of mortar shows a trend of first decreasing and then increasing when the content of fast hardened sulphoaluminate cement increases from 10% to 90%. With the increase of content, the initial resistivity of mortar increases gradually, and the early hydration of cement gradually accelerates. When the content increases from 60% to 90%, the resistivity curve begins to peak, and the peak appearance time Also gradually advance, at this time the compressive strength of mortar is also gradually increased.