Abstract
Due to the increasing use of rapid construction methods and the challenges of maintaining construction schedules, a growing demand exists for procedures that can assure quality of work without sacrificing the pace of construction. The quality control of construction materials specifically, the mechanical properties of concrete are among the most important concerns in today’s construction industry. In the present study, the correlation between fiber-reinforced concrete’s compressive strength and dynamic modulus to its ultrasonic pulse velocity is investigated at early ages up to 7 days after mixing. An experimental program involving 189 FRC specimens were designed containing different types of structural fibers, fiber volume fractions, and water-to-cement ratios. Mathematical equations were developed to predict the early-age compressive strength and dynamic modulus of four different types of fiber-reinforced concrete based on ultrasonic pulse velocity. The predicted compressive strength and dynamic modulus from the proposed equations showed good agreement with the measured ones.
Highlights
Due to the increasing use of rapid construction methods and the challenges of maintaining construction schedules, a growing demand exists for procedures that can assure quality of work without sacrificing the pace of construction
Citation/Citar como: Castillo, D.; Hedjazi, S. (2021) Early-age compressive strength and dynamic modulus of Fiber-reinforced concrete (FRC) based on ultrasonic pulse velocity
Most of these studies focus on predicting plain concrete’s compressive strength and dynamic modulus based on ultrasonic pulse velocity (UPV) after 28 days, while considering mixture parameters such as cement type, cement content, aggregate size, aggregate content, and w/c ratio
Summary
An experimental program was designed and conducted to establish a correlation between FRC’s early-age UPV and its early-age compressive strength and dynamic modulus. This program involved 189 specimens of 100 mm × 200 mm FRC cylinders with different mixture proportions. The UPV, dynamic modulus, and compressive strength were measured using an ultrasonic concrete tester, a resonance test gauge, and a compression test machine, respectively.
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