Abstract
Longitudinal wave velocity was measured and related to the physical properties of hardened cement paste. Longitudinal wave, generated by pulse oscillator were propagated to the sample under compressed state from 0 to 15 kb at from room temperature to about 230°C.The samples of cement paste, composed by normal portland cement and fine quartz sand, were hydrated and cured, in water or, autoclaved by different steam pressures.The major factors, effecting the longitudinal wave velocity, are thought to be caused by the crystal structure of hydrated products, pore size distribution, and grain contacts.The results of graphic from represents that the compressional longitudinal wave velocity appears to increase linearly with decrease in porosity and seems to approach to the original value of the calcium silicate hydrates.
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