This section specifies the test methods and calculations for the Los Angeles wear rate of railway gravel ballast. This section is applicable to the test of Los Angeles wear rate of railway gravel ballast, and also applies to the test of Los Angeles wear rate of gravel ballast and graded gravel.
TB/T 2328.1-2008 history
2018TB/T 2140.2-2018 Railway gravel ballast Part 2: Test methods