摘要
对比研究了复合前／后透水砖的外观及其主要性能的变化，在此基础上，固定表层配合比，研究了底层配合比设计参数（水灰比、集灰比、集料粒径以及级配等）对复合结构透水砖的有效孔隙率、透水系数与抗压强度等性能的影响。确定了复合结构透水砖的最佳水灰比为0．24～0．26，集灰比为3，粒径为2．36～4．75mm的集料在粒径为2。36～4．75mm和4．75～9．5mm的石灰石混合料中的最佳质量百分比范围为60％～100％。根据以上参数所配制的复合结构透水砖7d抗压强度大于30MPa，透水系数满足JC／T945-2005《透水砖》标准；当钢渣粉与矿渣粉复合掺合料等体积取代50％的水泥时，钢渣粉与矿渣粉存在一个最佳体积比25％：25％，在此比例下透水砖7d和28d抗压强度最高，分别为29．9MPa和35．8MPa，透水系数达2．83mm／s。
The variations of appearance and main properties of permeable brick were contrastively studied before and after compounded. On the basis of the fixed surface mix, the effects of underlying mix design parameters（such as mass ratio of water to cement, mass ratio of aggregate to cement, gradation and particle size of aggregate） on the properties of permeable brick including effective porosity, permeable coefficient and compressive strength were investigated. The optimum mass ratio of water to cement is 0.24-0. 26, mass ratio of aggregate to cement is 3, and the optimum percentage range is 60%-100% when aggregates with 2.36-4. 75 mm particle size were compounded in the limestone aggregate with 2. 36-4. 75 mm and 4. 75-9.5 mm particle size. According to the above parameters the permeable bricks with com- pound structure were prepared and cured for 7 d, whose compressive strength is higher than 30 MPa and permeable coefficient meets the standard of JC/T 945--2005. The optimum volume ratio of steel slag powder to blast furnace slag powder is 25%; 25% based on the mineral admixtures replacing cement by 50% with equal volume. Under this optimum ratio the compressive strengthes of permeable brick cured for 7 d and 28 d reach 29. 9 MPa and 35.8 MPa respectively, and its permeable coefficient reaches 2.83 mm/s.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2014年第1期34-38,共5页
Journal of Wuhan University of Technology
基金
韶关市科技计划项目(韶财教2009-78号)
韶关学院大学生创新创业训练计划(sycxcy2012-103)
