Abstract
High strength concrete (HSC) is vulnerable to early-age cracking owing to a low water-to-cement (w/c) ratio. Barchip fibers have been utilized to reduce the autogenous shrinkage of concrete. The relationship between autogenous shrinkage and ultrasonic velocity of HSC reinforced with Barchip fibers was studied utilizing the non-contact shrinkage test. Results indicated that the autogenous shrinkage and ultrasonic velocity of concrete decreased with the volume percentage of Barchip fibers increasing. Besides, models for predicting early-age autogenous shrinkage strain were proposed considering the fiber volume percentage and age based on the results of ultrasonic velocity.
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