DEVELOPMENT OF A PERMEABLE INTERLOCKING PAVEMENT
SYSTEM USING RECYCLED PLASTICS
OUR WORLD IN CONCRETE & STRUCTURES - 2012
S.F. Wong, X. Zhao, B.K. Tay, S. Ghosh and S.K. Ting
Recycled plastics, pavement, strength, water absorption, infrastructural applications
This paper reports the relevance, impact and sustainability of a permeable
interlocking pavement system using recycled plastics through the development and
construction of a prototype. The benefits of such pavement systems were identified
in areas of storm-water management and meeting a number of environmental
needs, as well as increased structural performance, productivity and sustainability.
Design considerations based on pavement material, type and layout were described.
From this study, a mix with 25% polystyrene (PS) by volume of total aggregates
was found to fulfil the strength and water absorption requirements for the permeable interlocking pavement system. The ease of preparation, mix homogeneity and low density of PS enhanced the technical properties of conventional pavement blocks. The low-density polyethylene (LDPE) of size 1-5 mm made it ideal for use in the sand bedding course; while a combination of larger-sized high-density polyethylene (HDPE) of 1-50 mm and polypropylene (PP) of 1-30 mm were suitable for the gravel base material.
A simple production method was employed to fabricate pavement blocks
incorporating recycled plastics for infrastructural applications. The potential uses of
recycled plastics for applications in green buildings and protective structures were