Correlating Water Permeability with Ultra-Sonic Pulse Velocity in Cementitious Mortars Subjected to Compressive Stress
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Water permeability and ultrasonic pulse velocity measurements were carried out on hollow cylinders made of cement based mortars simultaneously subjected to compressive stress. The level of stress was varied from 0-90% of the compressive strength. The role of fibre reinforcement was investigated through polypropylene microfibres incorporated at 0.25% volume fraction. It was found that the coefficient of permeability and the pulse velocity are sensitive to a threshold stress value. Fibres delayed the onset of this threshold for both these parameters. Based on the experimental results, an empirical correlation is made between the water permeability and ultrasonic pulse velocity.
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