Abstract
The ultrasonic wave reflection method, which measures the reflection coefficient (or reflection loss) of high frequency shear waves at an interface between a steel plate and a cementitious material, was used to monitor the early hydration process of Portland cement mortars with water-cement ratios of 0.35, 0.5 and 0.6. To obtain independent measures of cement hydration, chemical shrinkage and calcium hydroxide content of cement pastes with the same water-cement ratios were determined. The obtained results show that, at ages up to three days, the reflection loss measured on the mortars has a strong linear relationship to the chemical shrinkage and the calcium hydroxide content of the appropriate cement paste.
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Voigt, T., Shah, S.P. (2006). CHEMICAL SHRINKAGE AND CALCIUM HYDROXIDE CONTENT OF EARLY AGE PORTLAND CEMENT MONITORED WITH ULTRASONIC SHEAR WAVE REFLECTIONS. In: KONSTA-GDOUTOS, M.S. (eds) Measuring, Monitoring and Modeling Concrete Properties. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5104-3_39
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DOI: https://doi.org/10.1007/978-1-4020-5104-3_39
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