摘要：为了研究砒砂岩对硅酸盐水泥和硫铝酸盐水泥物理性能的影响,采用单因素多水平梯度实验,通过不同砒砂岩掺量的对比,测定硅酸盐水泥和硫铝酸盐水泥的凝结时间、标准稠度用水量和胶砂强度等性能。结果表明:砒砂岩对硅酸盐水泥和硫铝酸盐水泥皆有促凝作用,当砒砂岩掺量质量分数为5%时硅酸盐水泥的初凝时间会缩短30%,硫铝酸盐水泥初凝时间缩短47%,硅酸盐水泥和硫铝酸盐水泥的标准稠度用水量分别增加6.6%和21.7%;砒砂岩掺量质量分数为10%时,硅酸盐水泥的3 d和28 d的强度分别增加7.2%和6%,对其力学性能有较大影响;掺入砒砂岩后,硫铝酸盐水泥强度降低,且随掺量增加,抗压强度降幅增大。

关键词：硅酸盐水泥；硫铝酸盐水泥；粉煤灰；砒砂岩

Abstract：The one-single and multi-level gradient test were selected to investigate the influence of feldspathic stone on the physical properties of Portland cement and sulphoaluminate cement, with the comparison of different feldspathic stone substitution, setting time, standard consistency water consumption and mechanical performance of Portland cement and sulphoaluminate cement were tested. The results show that the certain amount of feldspathic stone shortens the setting time of Portland cement and sulphoaluminate cement. The initial setting time of Portland cement and sulphoaluminate cement are shortened by 30% and 47%, and the water requirement for normal consistency of Portland cement and sulphoaluminate cement are increased by 6.6% and 21.7%, separately, when the substitution of feldspathic stone powders is 5%. Mechanical performance of Portland cement is positive with 10% mass fraction substitution of feldspathic stone, and the compressive strength of 3 d and 28 d are increased by 7.2% and 6%, respectively. The compressive strength of sulphoaluminate cement is decreased with the increasing of feldspathic stone.

Keywords: Portland cement；sulphoaluminate cement；fly ash；feldspathic stone