Evaluation of hydraulic conductivity on pervious concrete for urban drainage application

Abstract

Impervious pavement leads to depletion of groundwater recharge and generate excessive surface runoff. In order to mitigate the flash flood problem, pervious surfaces were introduced to allows the passage of water to the ground through small openings, establishing a natural hydrologic balance which minimizes or delayed peak flow rate of precipitation. The research focused on determine hydraulic conductivity of pervious concrete unit, the product of existing drainage system developed by Majlis Bandaraya Shah Alam, MBSA to overcome flash flood problem in urban area. Other than that the study also will determine the appropriates size of aggregate (proposed 8 mm and 16 mm in cube) used as variables in hydraulic conductivity in experimental work, obtain porosity value from sieve analysis and compared with 7 established empirical equations. The experimental result shows 11.41 mm/s and 20.71 mm/s of hydraulic conductivity, while Alyamani and Sen give the nearest results of 7.0948 mm/s for 8mm cube and 21.3408 mm/s 16 mm cube. These new sustainable construction initiatives believed may become the answer for best management practice to control flash flood occurrence in urban development area.