Physical and Mechanical Properties of Recycled Concrete Aggregates for Road Construction in Malaysia

The physical and mechanical aggregate are one of the important factors that determine
the asphalt-aggregate bond. In Malaysia, the common types of aggregates used for road
construction are granite and sandstone, but application of recycled concrete aggregates
(RCA) are less. As the RCA made up from construction & demolition waste (CDW),
and the waste are increasing by time. Thus, the re-use of RCA are one of the solutions.
The purpose of this study was to determine the suitability of using RCA in road
construction based on a better understanding of its physical and mechanical properties
such as strength, stiffness and durability of the aggregates. The RCA was collected
from difference construction site. Aggregates tests had been conducted to determine the
properties and characteristic of the recycled concrete aggregates. The aggregates tests
are specific gravity and water absorption test, flakiness and elongation test, LA abrasion
test, and impact value test. It was determined that the RCA are suitable to be used for
construction of road pavement structure.