ANALYSIS AND DESIGN OF POROUS PAVEMENTS

Abstract

Permeable pavements typically consist of pervious concrete, porous asphalt, permeable interlocking concrete paving units or grid type systems over an open-graded base/sub base layers. Permeable pavements infiltrate storm water, reduce peak flows, filter and clean contaminants and promote groundwater recharge. They have gained substantial popularity in North America and now extent in India, have become an integral part of low impact design and best management practices for storm water management. In order to be effective, porous pavements must be designed to provide sufficient structural capacity to accommodate the anticipated vehicle loadings, manage storm water flowing into the surface and soil sub grade, as well water draining out of the base/sub base. This study focuses on successful application of permeable pavement design and performance with special emphasis on storm water management, water quality benefits, and identification of knowledge and data gaps. The study provides a summary of the current practice and design methods, discusses the potential application of permeable pavement for highway environment, summarizes the research progress documented in the literature related to mixed design, hydrologic performance, maintenance, water quality benefits, identifies knowledge gaps and unresolved issues, and explores the future direction in permeable pavement application. From design point of view, porous asphalt pavement (PAP) and porous concrete pavements (PCP) are designed in this dissertation work. Design of porous asphalt pavement was done using Marshall Mix design approach. The aim of this study was to find out the optimum binder content for open graded mix for wearing surface of PAP. Bitumen of grade VG 30 and polymer modified bitumen (PMB 40) are used to performing Marshall Mix design for OGFC mix. And comparison of results obtaining by Marshall Mix design are also shown in this dissertation work. Apart from the design of PAP, design of porous concrete pavement are also done in this dissertation work. In this work trial mixes were prepared using some guidelines obtaining from some research. And the target compressive strength was 20 MPa form these trial mixes. After that suitable mix design was chosen and the effect of glass fibers, on the strength of porous concrete mix were shown. Effect of class fiber are also checked for infiltration rate of porous concrete pavement. Apart from the design of porous pavements, reservoir layer thickness are also determined for different rainfall regions in India so that surface runoff from the pavements are avoided.