Relationship Between Ultrasonic Pulse Velocity and Compressive Strength of Concrete Made with Recycled Brick Aggregate

Abstract

For quite a few years, many attempts are made in order to find a suitable relationship between ultrasonic pulse velocity (UPV) and compressive strength of concrete. Such relations, if properly established, can promote a sustainable structural health monitoring system. Therefore, in this study, recycle brick aggregates that are commonly available in Bangladesh are tested in order to find a working relationship between UPV and compressive strength of concrete. Tests have been carried out on 28 days. Three volumetric sand to total aggregate ratios (s/a) 0.36, 0.40, 0.44 are considered to study the effect of variation of s/a. And, three W/C ratio are chosen as 0.45, 0.50, and 0.55. The cement paste occupies 32% of the total concrete volume (VPaste =32%). Here, the compressive strength of concrete is related with UPV on the basis of s/a ratio variation. Some relationships are proposed between UPV and compressive strength. Some comparison is also done between recycle brick aggregates and virgin brick aggregates for UPV and Compressive Strength. Finally, an elaborate and comprehensive analysis is made in order to compare between concrete made with recycle brick aggregates to have a final view about the relationship between ultrasonic pulse velocity (UPV) and compressive strength of concrete