• ackground:#FFCC00;">ackground:#FFCC00;">assessment ackground:#FFCC00;">of ackground:#FFCC00;">recycled ackground:#FFCC00;">concrete ackground:#FFCC00;">aggregates ackground:#FFCC00;">as a pavement material. Shiran Jayakody, Chaminda Gallage and Arun Kumar
  Geomechanics and Engineering, An Int'l Journal Vol. 6 No. 3, 2014
  Abstract; Full Text (970K)

Abstract
Population increase and economic developments can lead to construction as well as demolition of infrastructures such as buildings, bridges, roads, etc resulting in used concrete as a primary waste product. Recycling of waste concrete to obtain the recycled concrete aggregates (RCA) for base and/or sub-base materials in road construction is a foremost application to be promoted to gain economical and sustainability benefits. As the mortar, bricks, glass and reclaimed asphalt pavement (RAP) present as constituents in RCA, it exhibits inconsistent properties and performance. In this study, six different types of RCA samples were subjected classification tests such as particle size distribution, plasticity, compaction test, unconfined compressive strength (UCS) and California bearing ratio (CBR) tests. Results were compared with those of the standard road materials used in Queensland, Australia. It was found that material type 'RM1-100/RM3-0' and 'RM1-80/RM3-20' samples are in the margin of the minimum required specifications of base materials used for high volume unbound granular roads while others are lower than that the minimum requirement.

Key Words
recycling; waste concrete; road materials; classification tests

Address
Shiran Jayakody, Chaminda Gallage and Arun KumarSchool of Urban Development, Science and Engineering Faculty, Queensland University of Technology, Brisbane, Australia.