Current status and issues of geomaterial testing in proficiency tests

摘要

The Japanese Geotechnical Society, has been continuously carrying out proficiency tests related to geomaterial tests. In this report, based on the proficiency test reports from 2012-2017, and the results of the questionnaire undertaken in accordance with this, we summarized the accuracy and dispersion in the geomaterial test, and the actual state of its execution. As a result, it was confirmed that 1) the number of test centers participating in the proficiency test transitioned between 50-70 test centers, and the number of participations from government and private research and test centers showed an upward trend, that 2) the check on purchase of test equipment, and execution rate of pre-usage inspections and calibrations / periodic inspections showed an improvement, whereas in regard to some of the test equipment, the calibration / periodic inspection execution rate was particularly low, and that 3) the test standards compliance rate generally showed an upward trend, whereas for some of the test standards, the compliance rate was below 30%.