Solid State Science and Technology, Vol. 11, No 1 (2003) 83-88
EFFECTIVENESS OF ULTRASONIC METHOD IN DETECTION OF CONCRETE DETERIORATION
Norsuzailina Mohamed Sutan, Sinin Hamdan, Mugilan Meganathan
Faculty of Engineering, Universiti Malaysia Sarawak,
94300 Kota Samarahan, Sarawak, Malaysia
Tests were performed to evaluate the feasibility of using Ultrasonic Pulse Velocity Method (UPVM) in detecting defect and determining its depth during the early age concrete. Five reinforced concrete (RC) slabs grade 30 and 40 specimens at day 3, 7, 14 and 28 with a fabricated void at a known location were used. The results obtained were compared to determine the accuracy of the method hence the effectiveness of the method with different strength and as the concrete matures. This method detects defects in specimens during the early age. The accuracy varies with concrete strength and as the concrete mature. The test results indicate the method can be used to assess the in-situ properties of concrete or for quality control on site. The method showed better accuracy with stronger concrete detects defects with the accuracy ranging from 55.75-99.05% from day 3-28 (full strength) respectively.
Keywords: non-destructive testing, concrete, Ultrasonic Pulse Velocity Method, defects detection and accuracy
 Bungey J.H. (1980). "The Validity of Ultrasonic Pulse Velocity Testing In- place Concrete for Strength, ”N.D.T.International IPC Press, December pp. 296-
 Bungey J.H. (1982). "The Testing of Concrete in Structures,” Surrey University
Press pp. 35-59.
 BS 4408: pt.5 (1970). "Non-destructive Methods of Test for Concrete- Measurement of the Ultrasonic Pulses Velocity in Concrete,” British Standard Institution, London.
 ELE PUNDIT 6, Portable Ultrasonic Non-Destructive Digital Indicating Tester,
 Neville A.M. (1987). "Concrete Technology", Longman Group UK Limited, pp282, 631-633.
 Strurrup, V. R.; Vecchio, F. J.; and Caratin, H. (1984).“Pulse Velocity as a
Measure of Concrete Compressive Strength, ” In-Situ Non-Destructive Testing of Concrete, 82, American Concrete Institute, Detroit, pp. 201-227.