Among the many strategies presently used for stormwater management, pervious concrete is of great interest since its high porosity increases groundwater regeneration. Despite its popularity, pervious concrete is not currently being used or studied in Lebanon. This study used local materials to determine an optimum mix design for pervious concrete for a sidewalk project in Jdeideh, Lebanon. Samples were prepared with various water to cement (w/c) and aggregate to cement ratios (A/C). A cement by-product (cement kiln dust) was also used in the mix design. Cylindrical samples of each mix were prepared and cured for 28 days then subjected to permeability and strength tests. Results showed the optimum mix design was A/C=4.5 and w/c=0.36. Several laboratory specimens were then prepared using the optimum mix design. Clogging tests were performed by placing sediments on the surface of selected samples prior to permeability testing. Findings showed permeability decreased as the amount of sediment increased. The optimum mix was used to build a 500 m test section in Jdeideh, a major city north of Beirut. Field testing (i.e., percolation test) is being conducted and core samples taken for lab testing. The test section's performance will be monitored over the coming year.
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机译：在目前用于雨水管理的许多策略中，透水混凝土引起了极大的兴趣，因为它的高孔隙率促进了地下水的再生。尽管它很受欢迎，但黎巴嫩目前尚未使用或研究透水性混凝土。这项研究使用当地材料为黎巴嫩Jdeideh的人行道项目确定了透水混凝土的最佳配合比设计。用各种水与水泥（w / c）和骨料与水泥的比例（A / C）制备样品。混合设计中还使用了水泥副产品（水泥窑粉尘）。制备每种混合物的圆柱形样品并固化28天，然后进行渗透性和强度测试。结果表明，最佳混合设计为A / C = 4.5和w / c = 0.36。然后使用最佳混合设计制备了几个实验室标本。通过在渗透性测试之前将沉积物放置在所选样品的表面上来进行堵塞测试。研究结果表明，渗透率随沉积物数量的增加而降低。最佳混合料用于在贝鲁特以北的主要城市Jdeideh建立500 m的试验段。正在进行现场测试（即渗滤测试），并抽取了核心样品进行实验室测试。在接下来的一年中，将对测试部分的性能进行监控。
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