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UndergroundStructuralDetermination of Early-Age Compressive Strength of Shotcrete

Roland Here and Dudley R. Morgan

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Tere has long been a need for a reliable, simple-to-use means of determining the early-age rate of strength gain in shotcrete.During approximately the first 24 hours after shotcrete has been placed, its compressive strength is typically too low to measure using standard core-extraction and testing