JCE_V5_N3_RP3 Faezehossadat Khademi Mahmoud Akbari Sayed Mohammadmehdi Jamal Journal on Civil Engineering 2249 - 0779 5 3 23 30 Concrete, Ultrasonic Pulse Velocity (UPV), Compressive Strength, Microsilica Monitoring the relationship between compressive strength (fc) and ultrasonic pulse velocity (UPV) of concrete has been recently discussed by many researchers. In this paper, the compressive strength and Ultrasonic Pulse Velocity (UPV) of a wide range of structural concrete mixes are obtained experimentally. This study involves 90 different mixes tested for 28- day compressive strength and UPV. Firstly, the relation between the average velocity of ultrasonic waves and the Water- Cement ratio (W/C) is discussed. In addition, the relation between the average compressive strength and average ultrasonic pulse velocity is studied. Furthermore, the prediction of the concrete's compressive strength by using UPV test is investigated. Finally, the influence of using puzzolan, an additive material, on both concrete compressive strength and ultrasonic pulse velocity is discussed. June - August 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=3427