Experimental study on ultrasonic pulse velocity evaluation of the microstructure of cementitious material at early age

Journal article (2001)
Department
Mechanics, Materials and Structures (CEG) (TU Delft)
Copyright: © 2001 Guang Ye; Van Breugel, K; Fraaij, A.L.A.
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Published Date

01-01-2001

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Source:

HERON, vol. 46 (3), 2001

Faculty

Civil Engineering and Geosciences

Department

Mechanics, Materials and Structures

Abstract

This paper describes an ultrasonic experimental set-up to monitor the development of the microstructure of fresh concrete at different temperatures (isothermal curing at 10, 20, 30 and 50 °C) and water/cement ratios (0.40, 0.45 and 0.55). The Ultrasonic Pulse Velocity (UPV) is used as an indication for microstructure development of concrete at early age. The results indicate that the ultrasonic pulse velocity largely depends on the water/cement ratio and state of hydration during the first 24 hours. The numerical cement hydration simulation model HYMOSTRUC is used for investigating the relation between the change of microstructure and the evolution of ultrasonic pulse velocity. The relation between ultrasonic pulse velocity and compressive strength is almost linear at early stage. The ultrasonic pulse velocity method is proved to be applicable in the recording and monitoring the microstructure development and strength at early stage.