TY - JFULL AU - Erjola Reufi and Jozefita Marku and Thomas Bier PY - 2016/4/ TI - Ultrasonic Pulse Velocity Investigation of Polypropylene and Steel Fiber Reinforced Concrete T2 - International Journal of Civil and Environmental Engineering SP - 331 EP - 335 VL - 10 SN - 1307-6892 UR - https://publications.waset.org/pdf/10003932 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 111, 2016 N2 - Ultrasonic pulse velocity (UPV) method has been shown for some time to provide a reliable means of estimating properties and offers a unique opportunity for direct, quick and safe control of building damaged by earthquake, fatigue, conflagration and catastrophic scenarios. On this investigation hybrid reinforced concrete has been investigated by UPV method. Hooked end steel fiber of length 50 and 30 mm was added to concrete in different proportion 0, 0.25, 0.5, and 1 % by the volume of concrete. On the other hand, polypropylene fiber of length 12, 6, 3 mm was added to concrete of 0.1, 0.2, and 0.4 % by the volume of concrete. Fifteen different mixture has been prepared to investigate the relation between compressive strength and UPV values and also to investigate on the effect of volume and type of fiber on UPV values. ER -