Abstract
The acceleration ratio of the abrasion tester using water jet with sand was investigated to enable the progress estimation of abrasion which is needed to the asset management. The abrasion test was executed by using specimens taken from the sound part of concrete canals, and the results are compared with the abraded specimens from submerged part of the identical canals. Then, the acceleration ratio was calculated from the service period and the test duration needed to achieve the similar abrasion on the sound specimen. As a result, the acceleration ratio was 1.05-1.72y/h in the case assessing with the abrasion depth, and 0.50-8.85y/h in the case with the unevenness. The progress of abrasion could be estimated by using the calculated acceleration ratio. Moreover, it was confirmed that the unevenness converged at constant value while the abrasion depth kept increasing with service period.
