贫混凝土透水基层材料渗透性能室内试验  

Indoor test on permeability property of permeable lean concrete

作　　者：田波[1] 牛开民[1] 穆占领[1] 谭华 

机构地区：[1]交通部公路科学研究院,北京100088 [2]广西交通科学研究所,广西南宁530001

出　　处：《长安大学学报（自然科学版）》2008年第1期14-17,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131878831)

摘　　要：渗透系数和孔隙率是表征贫混凝土透水基层渗透性能的主要指标。利用垂直和水平渗透仪分别测试了多孔贫混凝土的渗透系数,并分析了其满足达西定律的水头范围,得出孔隙率与渗透系数的关系。结果表明:多孔贫混凝土只要保证水力梯度小于0.04,就能满足达西定律的要求;有效空隙率和全孔隙率之间呈相关性良好的线性关系,有效孔隙率和渗透系数之间满足相关性良好的幂指数关系,贫混凝土透水基层的临界排水有效孔隙率为14.4%。Permeability coefficient and porosity are the main drainage characters of porous concrete, this paper adopted vertical and horizontal permeameters to test the permeability coefficients of porous lean concrete, analyzed the waterhead for meeting Darcy Law, and drew the relationships between porosity and permeability coefficient. The results show that porous lean concrete can meet the demand of Darcy Law when the hydraulic gradient is less than 0.04： there is a good liner relationship between effective porosity and whole porosity, and there is good power exponent relationship between effective porosity and permeability coefficient; the critical effective permeable porosity for porous lean concrete is 14.4%. 3 tabs, 7 figs, 10 refs.

关 键 词：道路工程 贫混凝土 透水基层 渗透系数 孔隙率 

分 类 号：U414[交通运输工程—道路与铁道工程] TU37[建筑科学—结构工程]