ULTRASONIC PULSE VELOCITY TEST(NDT on Hardened concrete)

BY BY:

AKSHAY R MANOHAR1 sem Mtech(Construction Technology) CIVIL ENGINEERING DEPT.

NMAMIT-NITTE.

ULTRASONIC PULSE VELOCITY TEST

• This test is done to assess the quality of concrete by ultrasonic pulse velocity method as per IS: 13311 (Part 1) – 1992.

PRINCIPLE OF TEST

The method consists of measuring the time of travel of an ultrasonic pulse passing through the concrete being tested.

Comparatively higher velocity is obtained when concrete quality is good in terms of density, uniformity, homogeneity etc.

Concrete quality accordingly to pulse velocity.

Significance and Use

• Uniformity and relative quality of concrete .

• To indicate the presence of voids and cracks, and to evaluate the effectiveness of crack repairs.

• When used to monitor changes in condition over time, test locations are to be marked on the structure to ensure that tests are repeated at the same positions.

• The degree of saturation of the concrete affects the pulse velocity

• The pulse velocity is independent of the dimensions of the test object provided reflected waves from boundaries

REFERENCE

• Ultrasonic Pulse Velocity in Concrete Using Direct and Indirect Transmission. by Ismail Ozgur Yaman, Gokhan Inei, Nazli Yesiller, and Haluk M.

• CONCRETE TECHNOLOGY – A text book- ML Gambhir.

THANK YOU