[This article belongs to Volume - 54, Issue - 02]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-10-11-2022-423

Title : ASSESSMENT OF SELF HEALING ABILITY OF RECYCLED AGGREGATE CONCRETE
Dr Depaa RA B

Abstract :

The effect of self-healing has been studied on Normal Concrete (NC) with Ordinary Portland Cement (OPC) and by replacing Recycled Aggregates (RA) for coarse aggregates. For this purpose, recycled aggregate replacement percentage of 50% has been adopted and studied. To provide workability, the adopted water cement ratio was preserved at 0.45. The samples were examined for split tensile strength, compressive strength, flexural strength, and UPVT (Ultrasonic Pulse Velocity Test) at the beginning, after micro cracks were made, and after they had healed. Water absorption tests and Rapid Chloride Permeability Tests (RCPT) were performed initially, 70 percent preloading, and then after healing to investigate the durability features of self healing concrete. Chemical examination of the chemicals responsible for the healing effect was performed using FESEM (Field Emission Scanning Electron Microscope), X-ray powder diffraction (XRD) analysis and EDAX (Energy-dispersive X-ray spectroscopy). The test results indicated that recycled aggregates, upto 50% replacement for coarse aggregates can effectively be used as a self healing agent without compromising on strength and durability aspects.