Materials and Construction
SURVEY ON THE HISTORY OF TEST METHODS RELATING TO DELETERIOUS SUBSTANCES IN GRAVEL AND SAND FOR CONCRETE
2023 Volume 29 Issue 72 Pages 573-578
Details
2023 Volume 29 Issue 72 Pages 573-578
Percentage of gravel and sand to all aggregates for concrete is decreasing, but yet large amount of them has been used in Japan. In this report, the history of test methods for fines, organic impurities, lightweight particles, clay lumps and soft pebbles as deleterious substances in gravel and sand was investigated. As the result of survey, it was confirmed that above test methods of Japan were established on the basis of ASTM test methods and then they developed in their own way in detail. The test methods for lightweight particles and soft pebbles in JIS were discontinued in 2015.
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