Engineering Behavior of Concrete with Recycled Aggregate Afizah Ayob, Mohd. Ekhwan Razali, Salina Alias, Abdul Ghapar Ahmad and Dayang Siti Hazimmah Ali MATEC Web Conf., 87 (2017) 01002 Published online: 12 December 2016 DOI: 10.1051/matecconf/20178701002