圧縮荷重を受ける鋼繊維補強モルタルのAE特性

概要

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The acoustic emission characteristics of the steel fibre reinforced cement mortar under uniaxial compression and creep load have been studied experimentally using the cylindrical specimens with 5cm in diameter and 10cm in height. The tests of uniaxial compression and creep were conducted along with the AE measurements. The relationships between the AE count detected from the specimen during loading process and the stress-strain behaviour of it were investigated to clarify the fracture mechanism of the specimen. The results obtained are summarized as follows : 1) The creep strain of the steel fibre reinforced cement mortar specimen is taken to be the same size as that found for the plain mortar specimen. 2) The cumulative curves of AE detected from the both specimens indicate the same type curve. 3) The AE event count rate of the specimen is in proportion to the volumetric strain rate of it. 4) In the process of creep, sometimes, the large amounts of AE are detected from the specimen and the abrupt increasing of the creep strain is observed after a short time from that. The creep strain curve of the specimen under compressive load does not indicate a smooth line and the detected AE is closely connected with the creep strain.
神戸大学の論文
1983-01-30