Author : Hrez Jessam, Salim
Use of Recycled Coarse Aggregate from Construction Waste Compared with Iraqi Natural Aggregate to Production of New Concrete
journal of kerbala university,
2017, Volume 13, Issue 4, Pages 111-118
The reuse of construction waste in the production of concrete achieves two goals; the first is the removal of large amounts of sources of environmental pollution resulting from these wastes and, the second objective is to provide cheap sources of concrete aggregate. This study included test properties for two types of concrete mixes: concrete made with natural aggregate (NAC) and, the other mixes was made with fine natural aggregate and recycled coarse aggregate (local waste). These wastes were used in the second mix after removing the large pieces of gravel and well washing and grading. The results showed that recycled aggregate has a lower specific gravity and higher water absorption compared to the natural aggregate. The results also revealed that the concrete produced using the recycled aggregate has acceptable compressive strength and water absorption ratio and it has a higher flexural strength and less density comparing with concrete made with natural aggregate. So it is appropriate to use the concrete made using recycled aggregate in the work of paving concrete roads, casting of cars carriages, casting sidewalks and road paths.