为了提高混凝土的抗渗性能,将石蜡按水泥质量比例的0%、2%、4%、6%以外掺的方式掺入到混凝土中,研究了石蜡对混凝土工作性能、抗压强度和抗渗性能的影响。试验结果表明:掺入石蜡使混凝土的坍落度增大,当石蜡掺量为4%时较好;在掺量不大于4%时,混凝土7d、28d抗压强度有小幅减小;石蜡使混凝土的吸水率和相对渗透系数均减小,当石蜡掺量大于4%时,可使二者的减小幅度达到50%以上。
To improve the permeability of concrete, paraffin was mixed into concrete at 0%, 2 %, 4 %, and 6 of cement by weight with external method, and effects of paraffin on workability, compressive strength and permeability of concrete were studied. The experimental results show: the slump of concrete is improved by paraffin, and it is optimal when the content of paraffin is 4%. The reduction ratios of compressive strength of concrete are less at 7 days and 28 days when the content of paraffin is less than 4%. The water absorption and the water-pressure relative permeability coefficient both decrease when paraffin is mixed, and those reduction ratios are more than 50% when the content of paraffin is more than 4%.