TRANSACTIONS OF THE JAPANESE SOCIETY OF IRRIGATION, DRAINAGE AND RECLAMATION ENGINEERING, Volume 199, Page 83-88 (1999)

Effect of Curing and Compaction, Development of Strength in Various Kinds of Concrete Test Pieces
-Estimation of concrete strength by non-destructive methods (III)-

SATO SHUSHI*, HATTORI KUNIO**, OGATA HIDEHIKO** and RYUUICHI TAKADA***

* Graduate School of Agriculture, Tottori University
(101-4 Minami Koyama-cho, Tottori, 680-8553, JAPAN)
** Faculty of Agriculture, Tottori University
(101-4 Minami Koyama-cho, Tottori, 680-8553, JAPAN)
*** Shimane Prefectural Government
(1741-1 Hrgashi Tuda-cho, Matue, 690-0011, JAPAN)

Abstract

　In this research, concrete test pieces with different, sizes and shapes, and standard cured specimens were made by the same mix proportion of concrete at the same time, and the influences of the development of strength, the effect of curing, and the effect of compaction were compared based on the method of ultrasonic pulse velocity.
　As a result, the effect of curing decreased by becoming a massive concrete specimen. The strength development in the center part of a specimen is delayed because of this curing effect. Also, at the upper part of a mass concrete specimen, the disorder of compaction is not residual by becoming massive.
　On the other hand, ultrasonic pulse velocity decreases as the length of the mass concrete specimen becomes longer, and the section size larger. As for the degree of length and section size of a specimen to the ultrasonic pulse velocity, section size was more influence able than length.