EFFECT OF APPLYING ULTRASONIC WAVES IN MIXING WORKS ON COMPRESSIVE STRENGTH OF CONCRETE

Abstract

This report studied effects of applying ultrasonic waves on concrete in mixing works, by measuring compressive strength, slump, and air content, and by investigating the microstructure of the hardened concrete. The results showed the increase in compressive strength, but little influence on slump and air content. It was also observed that the microstructure became more dense, especially in the interfacial zone between aggregate and cement paste.