ABSTRACT Pervious concrete is widely recognized as a sustainable building material, as it reduces storm water runoff, improves storm water quality, may recharge groundwater supplies, and can reduce the impact of the urban heat island effect. The term pervious concrete typically describes a near-zero-slump, open-graded material consisting of Portland cement, coarse aggregate, little or no fine aggregate, admixtures, and water. The combination of these ingredients will produce a hardened material with connected pores, ranging in size from 0.08 to 0.32 in. (2 to 8 mm), that allow water to pass through easily. The void content can range from 15 to 35%, with typical compressive strengths of 400 to 4000 psi (2.8 to 28 MPa). The compressive strength is determined at 7, 14 and 28 days of curing. The drainage rate of pervious concrete pavement will vary with aggregate size and density of the mixture, but will generally fall into the range of 2 to 18 gal./ min/ft (81 to 730 L/min/m ). The permeability is determined by falling head permeability test. Our objective is to use this pervious concrete in footpaths, so that the ground water level would be increased during rainy times, instead it gets diverted to sea and getting wasted.
展开▼
机译：摘要透水混凝土被公认为可持续的建筑材料，因为它可以减少雨水径流，改善雨水水质，可以补充地下水供应，并可以减少城市热岛效应的影响。透水混凝土一词通常表示坍落度接近零，开放级的材料，该材料由波特兰水泥，粗骨料，很少或没有细骨料，外加剂和水组成。这些成分的结合将产生具有连接孔的硬化材料，这些孔的大小范围为0.08到0.32英寸（2到8毫米），使水容易通过。空隙含量可在15％至35％之间，典型的抗压强度为400至4000 psi（2.8至28 MPa）。在固化的7、14和28天确定抗压强度。透水混凝土路面的排水速率将随混合物的总尺寸和密度而变化，但通常会落在2至18 gal./min/ft（81至730 L / min / m）的范围内。渗透率通过落头渗透率测试确定。我们的目标是在人行道上使用这种透水的混凝土，以便在雨天增加地下水位，而不是转入大海浪费。
展开▼
