ABSTRACT
Recently, the use of recycled crushed concrete aggregates (RCA) as a substitution of natural aggregates (NA) in unbound granular layers has become more popular, and can contribute for an economic and environmental sustainability of road and highway construction. Generally, the unhydrated cement in the adhered mortar of the RCA can lead to a growth in stiffness and strength in unbound layers, which is known as the self-cementing properties. However, this mechanism has not been thoroughly studied. In this study, samples of two different RCAs (old and fresh crushed concrete aggregates) after different curing time (1 day, 28 days and 180 days) are tested to study the self-cementing properties using the laboratory monotonic triaxial test and repeated load triaxial test (RLTT) which is used for the study of short-term and long-term mechanical behaviours of these recycled crushed concrete aggregates.
