Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Setting time and compressive strength prediction model of concrete by nondestructive ultrasonic pulse velocity testing at early age
Highlights The nature change in concrete at early ages was examined using the ultrasonic pulse velocity. W/C ratio, curing conditions, aggregate, and ultrasonic pulse velocity of concrete was analyzed. The relationship among the abovementioned parameters were examined. Setting times and initial compressive strength development were related to the ultrasonic pulse velocity. An exponential function prediction model was proposed for modeling the condition change.
Abstract This study proposes a new model for estimating the setting and compressive strength development times, which involve changes in the concrete condition at early ages, using the ultrasonic pulse velocity testing. To this end, various effects, such as the effects of the water-to-cement (W/C) ratio, curing conditions (air-dry curing and curing at constant temperature and humidity), and aggregate, were experimentally examined to meet the specified concrete strength, i.e., 18–45 MPa. We found that varied as the W/C ratio of concrete decreased, which are affected by the hydration reaction, and that the ultrasonic pulse velocity was somewhat higher in concrete than in mortar. The samples cured under constant temperature and humidity exhibited a smaller error range than those that underwent air-dry curing. In addition, the relationships among parameters in different concrete samples were found to be linear during the initial and final setting periods and parabolic after the final set at early ages; subsequently, an exponential function prediction model was proposed for modeling the relationships.
Setting time and compressive strength prediction model of concrete by nondestructive ultrasonic pulse velocity testing at early age
Highlights The nature change in concrete at early ages was examined using the ultrasonic pulse velocity. W/C ratio, curing conditions, aggregate, and ultrasonic pulse velocity of concrete was analyzed. The relationship among the abovementioned parameters were examined. Setting times and initial compressive strength development were related to the ultrasonic pulse velocity. An exponential function prediction model was proposed for modeling the condition change.
Abstract This study proposes a new model for estimating the setting and compressive strength development times, which involve changes in the concrete condition at early ages, using the ultrasonic pulse velocity testing. To this end, various effects, such as the effects of the water-to-cement (W/C) ratio, curing conditions (air-dry curing and curing at constant temperature and humidity), and aggregate, were experimentally examined to meet the specified concrete strength, i.e., 18–45 MPa. We found that varied as the W/C ratio of concrete decreased, which are affected by the hydration reaction, and that the ultrasonic pulse velocity was somewhat higher in concrete than in mortar. The samples cured under constant temperature and humidity exhibited a smaller error range than those that underwent air-dry curing. In addition, the relationships among parameters in different concrete samples were found to be linear during the initial and final setting periods and parabolic after the final set at early ages; subsequently, an exponential function prediction model was proposed for modeling the relationships.
Setting time and compressive strength prediction model of concrete by nondestructive ultrasonic pulse velocity testing at early age
Lee, Taegyu (Autor:in) / Lee, Jaehyun (Autor:in)
05.04.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2006
Compressive strength and ultrasonic pulse velocity relationships for concrete in columns
| Engineering Index Backfile | 1958
Predicting Concrete Compressive Strength Using Ultrasonic Pulse Velocity and Rebound Number
| British Library Online Contents | 2011