ISSN 2063-5346
For urgent queries please contact : +918130348310

Bond strength between the recycled coarse aggregate concrete and rebar

Main Article Content

» doi: 10.48047/ecb/2023.12.12.156


During the past few years, sustainable resource management and development have been at the forefront of crucial concerns affecting the construction sector. Concrete, one of the most widely used building materials in the world, is made of aggregate, sand, cement, and water, and it can be recycled and used again in a variety of ways. The use of recycled concrete aggregates (RCA) in the production of concrete has a number of benefits, including the possibility of a significant reduction in the demand placed on non-renewable aggregate resources, an extension of the useful life and capacity of landfill and waste management facilities, and a decrease in the carbon dioxide emissions and traffic congestion connected with the transportation of virgin aggregates from distant sites. In this study, the interactions between aggregate characteristics, concrete characteristics, and bond characteristics between reinforcing steel and RCA concrete are examined. Pullout tests were run to examine the binding behavior between steel rebar’s and recycled coarse aggregate concrete. Four recycled coarse aggregate (RCA) replacement percentages 0%, 30%, 60%, and 90% are taken into consideration together with water-cement ratios of 0.42, 0.45, 0.48, 0.51, and 0.55. Based on the test results, the effects of the water-cement ratio and the replacement percentages of recycled coarse aggregate on the binding strength between the concrete and steel rebars were examined. It was found that under the equivalent mix proportion (i.e., the mix proportions are the same, except for different recycled coarse aggregate replacement percentages), the bond strength between the recycled coarse aggregate concrete and rebar initially decreases with an increase of the recycled coarse aggregate replacement percentage, whereas afterwards the bond strength increases with increase in replacement level of coarse aggregate.

Article Details