石蜡对混凝土抗渗性能的影响

Effect of Paraffin on Permeability of Concrete

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%.