混凝土砂基透水路面砖制备及物理性能测试

发布时间：2018-11-03 15:39

【摘要】：推广砂基透水砖是实现沙漠沙资源化的有效途径.以烘干砂为主要骨料、高标号水泥为粘结剂并采用静压成型工艺,研制出一种预制透水孔的混凝土砂基透水路面砖,并对所研制的透水砖进行了物理性能测试和造价分析.结果表明:(1)所研制的混凝土砂基透水砖抗压强度超出我国建筑材料行业标准Cc60透水砖的要求,抗压强度可达100 MPa.(2)预设的透水孔使混凝土透水砖的透水性超过行业标准,而且透水孔上小下大,不易堵塞,不影响人行步道的舒适性.(3)根据透水砖的抗压强度、透水性、保水性、造价等方面综合考虑,选取细砂率70%、水灰比0.34、孔隙率2%、添加水性氯丁胶(AN)的第20组作为高强透水砖优选方案,选取细砂率85%、水灰比0.30、孔隙率1%、无添加剂的第22组作为常用广场透水砖优选方案,用于后续产业化开发研究.(4)增加粗骨料可显著提高透水砖的抗压强度,透水砖的细砂率可控制在70%~85%.(5)添加合适类型和剂量的添加剂可提高透水砖的抗压强度.(6)除了第7、11、12、19组造价偏高以外,其余组次造价都在60~100元/m2,与常规无砂混凝土透水砖价格接近,远小于市场上已有同类砂基透水砖的价格.
[Abstract]:Spreading sand-based permeable brick is an effective way to realize desert sand resource. Using dry sand as main aggregate, high grade cement as binder and hydrostatic forming technology, a kind of concrete sand based permeable road brick with prefabricated water permeable hole is developed. The physical properties and cost of the developed permeable brick are tested and analyzed. The results show that: (1) the compressive strength of concrete sand based permeable brick exceeds the requirement of Cc60 permeable brick, which is the standard of construction material industry in China. The compressive strength can reach 100 MPa. (2) the preset permeable hole makes the permeability of the concrete permeable brick exceed the industry standard, and the permeability of the permeable brick is large and small up and down, so it is not easy to jam. (3) according to the compressive strength of the permeable brick, it does not affect the comfort of the pedestrian walkway. (3) according to the compressive strength of the permeable brick, Considering the water permeability, water retention, cost and so on, select the fine sand ratio 70, water cement ratio 0.34, porosity 2, add water chloroprene (AN) as the best selection scheme of high strength permeable brick, select fine sand ratio 85. The water cement ratio of 0.30, porosity of 1 and no additive in group 22 were used as the optimum selection scheme for the common plaza permeable brick. (4) the compressive strength of the permeable brick could be significantly improved by increasing coarse aggregate. The ratio of fine sand in permeable brick can be controlled at 70%. (5) the compressive strength of permeable brick can be improved by adding additives of appropriate type and dosage. (6) except for group 71111219, the cost of other groups is on the high side, and the cost of other groups is 60 ~ 100 yuan / m ~ 2. It is close to the price of conventional sand-free concrete permeable brick and is far less than the price of similar sand-based permeable brick in the market.
【作者单位】：大连理工大学水利工程学院;天津大学水利工程仿真与安全国家重点实验室;浙江省慈溪市水利局;
【基金】：国家自然科学基金资助项目(51079016) 辽宁省教育厅科学技术研究资助项目(LS2010034) 2012年研究生教学改革与研究基金资助项目(JGXM201228)
【分类号】：U416.2;TU522.1

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