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- W131021886 abstract "This paper reviews three abrasion-resistance tests for concrete paving blocks which are most commonly used in South Africa. For each test, there are descriptions or discussions of: (1) the test method; (2) the test's abrasive action; (3) the test's main advantages; (4) the test's main disadvantages; (5) the test's repeatability; and (6) the test's reproducibility. The MA20 test was introduced as a standard test in Australia in 1986. It involves abrasion of the paver surface by a rapidly rotating ball race, which leaves a circular groove on the concrete paving block. One of its further developments is the CMA20 test, which aims to address several factors that are alleged to result in the MA test's high variability. The PCI wire brush abrasion test was developed from an NBRI abrasion test and the principles of the Boehme test. The wire brush rotates at 450rpm on the surface of a concrete paver under a constant load of 145N. The ASTM C418 sand-blast abrasion test is prescribed in Specification ASTM C936 for checking the abrasion resistance of solid concrete interlocking units. The South African Bureau of Standards has used it to investigate wear-related problems in concrete paving blocks. The author concludes that no test should be adopted as a National Standard until it has been properly evaluated." @default.
- W131021886 created "2016-06-24" @default.
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- W131021886 date "1995-08-01" @default.
- W131021886 modified "2023-09-27" @default.
- W131021886 title "REVIEW OF THREE ABRASION-RESISTANCE TESTS FOR CONCRETE PAVING BLOCKS" @default.
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