Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering)

Abstract : The focus on utilizing reclaimed construction materials arises from the surge in construction and demolition waste caused by rehabilitation, natural disasters, and technological disasters. The measures taken to create recycled concrete adhere to three primary criteria: conservation of natural resources, utilization of increasing waste, and savings in energy and finances. This research paper examines the durability properties of concrete produced by partially replacing Recycled Coarse aggregate and seashore sand. The properties investigated include water absorption test, porosity, Alkalinity, Sorptivity, acid resistance test, and Rapid chloride penetration test. The compressive strength test determined that the optimal replacement level for recycled coarse aggregate (RCA) in concrete is 40%. The study on durability properties involved testing concrete with a constant 40% recycled coarse aggregate and varying replacement levels for river sand with both untreated and treated seashore sand (0%, 10%, 20%, 30%, 40%, 50%, and 100%). The results were compared to those of conventional concrete, revealing that recycled coarse aggregate concrete combined with seashore sand yields durability properties comparable to conventional concrete.