Authors : Moslem J. Shamiah, Maad S. Madlaji and Abdullah G. Nassour
Abstract: This study aims at exploring the way of decreasing effects of impurities (such as clay and dust) of recycled aggregates on concrete quality in the Eastern area, Syria by excluding the detrimental materials retained on the pan. After that, properties of concrete have been investigated to test its conformity to structural requirements. For that, about 30 specimens collected from different mixesof recycled aggregates were casted and tested. Portland cement (290-510) kg/m3, water/cement ratio (0.33-0.66) and tap water were used. The compressive strength values of concrete cubes varied between 25-5 MPa, noting that strength development was monitored under continuous curing in tap water , up to 91 days. Within 28 days, modulus of elasticity of the specimens varied from 25-40 GPa which refers to good quality concrete. The flexural strength of these concretes was around 6 MPa. Also, the workability of concrete batches was good because of using plasticizers. Based on results, the properties of recycled aggregate concreteare able to produce concrete which meets construction standards after discarding the impurities through the pan.
Moslem J. Shamiah, Maad S. Madlaji and Abdullah G. Nassour, 2018. Improving the Quality of Recycled Aggregate Concrete to Meet Construction Standards: A Case Study in Euphrates Basin in the Eastern Region of Syria. Research Journal of Applied Sciences, 13: 491-498.