PERFORMANCE EVALUATION OF PERVIOUS CONCRETE WITH AND WITHOUT RESERVOIR LAYER

Abstract

Pervious Concrete Pavement (PCP) is a new paving technology that is gaining popularity among academics due to its benefits in reducing storm water runoff and reducing urban heat islands. The type of aggregate gradation as well as the water-to-cement (w/c) ratio are crucial factors to consider while creating PCP mixtures. The goal of this research is to learn more about the performance of pervious concrete with and without a reservoir layer. In this investigation, ternary aggregate gradations of 12.5mm, 20mm and 40mm were used. A 5m long portion with a 3m width by 0.25m was casted with PCP having 350mm of reservoir layer. The reservoir layer was well graded mix of 12.5mm, 20mm and 40mm. At w/c ratios of 0.38, the porosity, density, permeability, compressive strength, flexural strength, and were investigated. The core samples taken out for the testing purposes and above mentioned PCP properties were tested. The mechanical properties of the PCP mixes were tested along with its relationship with determined permeability and desired porosity. The reduction of surface runoff and prevention of water stagnation on the pavement surface are indicators of PCP's effectiveness. The numerous layers of PCP play a major role in this. All loads from the top layers should be able to sustain the subgrade layer. Similarly, the reservoir layer should be able to contain water and either drain it through the under drain system or allow subgrade percolation to occur. Subgrade layer was constructed with compaction aiming at 92 to 93 percent, and reservoir layer was prepared with aggregate sizes ranging from 12.5 mm to 40 mm to make the present study more definitive. The permeability of the soil will be determined using a falling head permeameter that will be put on site. This tests will be carried out during rainfall to check its efficacy and deduce results.