免振捣多孔混凝土配合比设计方法  

Mix design method of porous concrete with non-vibration molding

作　　者：盛燕萍[1] 陈拴发[1] 郑木莲[1] 张登良[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《交通运输工程学报》2009年第1期44-49,共6页Journal of Traffic and Transportation Engineering

基　　金：国家西部交通建设科技项目(200631800005);"十一五"国家科技支撑计划重点项目(2006BAF02A00)

摘　　要：为保证多孔混凝土排水基层的平整度,通过体积法对免振捣多孔混凝土排水基层进行了配合比设计,计算得到各配合比参数、稀释系数、合理的水灰比及用水量,提出了免振捣多孔混凝土工作性评价方法——富余浆量法和评价指标——富余浆量比,通过正交试验设计,得到了富余浆量比的回归关系式、7d抗压强度和有效空隙率之间的相关关系式,最后提出了基于经验公式的免振捣多孔混凝土配合比设计方法。性能试验表明:该方法设计的混合料7d抗压强度在3～5MPa(重交通)和5～8MPa(特重交通)之间,空隙率在20%～30%之间,均达到设计标准,因此,该设计方法可行。In order to ensure the smoothness of porous permeable concrete base, volume method was used for the mix design of non-vibration porous permeable concrete base, mix proportion parameters, dilution coefficience, reasonable water cement ratio and water consumption were calculated, the evaluating method and index for the workability of non-vibration porous permeable concrete base were given, such as margin cement mortars method and margin cement mortars ratio. Through orthogonality design, the regression equation of margin cement mortars ratio and the relationship between 7 d compression strength and effective porosity were obtained, and the mix design method of porous concrete with non-vibration molding was indicated on the basis of empirical formulas. Analysis result shows that the mixture designed by the method can satisfy the design standard that 7 d compression strength is 345 MPa for heavy traffic and 5-8 MPa for special heavy traffic, effective porosity is 20%-30%, so the design method is feasible. 10 tabs, 13 refs.

关 键 词：路面材料 免振捣多孔混凝土 工作性 空隙率 配合比设计 

分 类 号：U414.18[交通运输工程—道路与铁道工程]