砂率对透水混凝土性能的影响  

The Effect of Sand Percentage on Performance of Permeable Concrete

作　　者：王耀峰 WANG Yao-feng(Shanxi Transportation Survey&Design Institute Co.,Ltd.,Taiyuan,Shanxi 030032,China)

机构地区：[1]山西省交通规划勘察设计院有限公司,山西太原030032

出　　处：《山西交通科技》2019年第5期26-29,共4页Shanxi Science & Technology of Transportation

摘　　要：以含砂透水混凝土为研究对象,分析了砂率(0%、5%、10%、15%)对透水混凝土抗压强度、有效孔隙率、透水系数及耐酸雨性能的影响。结果表明:砂率在0~15%范围内时,随着砂率的增加,透水混凝土的抗压强度先增大后减小,有效孔隙率和透水系数先减小后增大;含砂透水混凝土在经受酸雨侵蚀时,其质量前期损失速率较快,而后期损失速率减缓,与普通混凝土中的规律相反;掺入少量细砂可以提高透水混凝土强度和抗酸雨侵蚀性能而不影响透水性能,建议透水混凝土最佳砂率为5%左右。Selecting sand permeable concrete as the object, this paper analyzed the effect of different sand percentage(0%, 5%, 10%, 15%) on compressive strength, effective porosity, permeability coefficient and acid rain resistance of permeable concrete. The results showed that, when the sand percentage is in the range of 0% to 15%,with the increase of the sand percentage, the compressive strength of permeable concrete increases first and then decreases, and effective porosity and permeability coefficient decrease first and then increase. During the acid rain erosion, the mass loss rate of sand permeable concrete in the early stage is faster, while in the later stage is slower,which is contrary to the regularity of ordinary concrete. Adding a small amount of fine sand can improve the strength and acid rain resistance of permeable concrete without affecting the permeability performance, the best recommended permeable concrete sand percentage is about 5%.

关 键 词：砂率 透水混凝土 抗压强度 透水性能 耐酸雨侵蚀性能 

分 类 号：U414[交通运输工程—道路与铁道工程]