2024-03-29T12:12:11Z
https://kitami-it.repo.nii.ac.jp/oai
oai:kitami-it.repo.nii.ac.jp:00006703
2022-12-13T02:20:01Z
7:15:46
The service life prediction of concrete in cold region by model specimen and reliability theory.
Hiroshi, SAKURAI
33814
Koichi, AYUTA
33815
Noboru, SAEKI
33816
Kaneyoshi, OKADA
33817
Hiroaki, ARAI
33818
Hiroshi, SAKURAI
33819
Koichi, AYUTA
33820
Noboru, SAEKI
33821
Kaneyoshi, OKADA
33822
Hiroaki, ARAI
33823
application/pdf
The purpose of this study is to examine how durability can be evaluated and deterioration estimated for reinforced concrete structual members in a cold environment. Under such conditions, concrete components suffer frost damage and steel corrosion. Model specimens of size 10×10×40 cm were developed ; these are suitable for rapid freez-thaw tests according to ASTM C 666, exposure testing, and load testing. Case studies were carried out in which many external factors. From the data obtained, an evaluation of the durability of concrete was induced by using a reliability function (R(t)). In the case of a water-cement ratio of 45 %,the reliability in the case of set-up ratio to initial ultimate strength becomes unreliable ? that is,the reliability falls below the assumed set-up ratio of 0.95 by neary 0.85%?at about 300 cycles. In the case of a water-cement ratio of 45 %,the reliability in the case of set-up ratio to initial ultrasonic velocity becomes unreliable?that is, the reliability falls below the assumed set-up ratio of 0.90 by neary 70%?at about 300 cycles. Thus,the durability of cocrete is influenced by the number of freeze-thaw cycles.
departmental bulletin paper
北見工業大学
1993-09
application/pdf
北見工業大学研究報告
1
25
71
79
https://kitami-it.repo.nii.ac.jp/record/6703/files/25-1-8.pdf
eng