Chemical compositions of RG Chemical compositionMixed

It can be seen that adding up to 50% RG to SCAM caused a significant reduction in the compressive strength, and beyond this level, the adverse effect became less obvious. Similar results had been widely reported in other previous studies (Seung et?al., 2004, Adnan and Rodger, 2012 and Ling et?al., 2012). It can be broadly perceived that the weak bonding between the smooth surface of the RG aggregates and the cement hydration products accounted for the reduced compressive strength.