This is a continuation for requirements for wash water for using in ready-mixed concrete(P-1). For better understanding reader are required to read previous post. Now we will go to the point.
Regarding testing frequency ASTM specifies that throughout the first 4 weeks the test should be conducted in a interval of a week. After that a monthly interval of testing can be accepted frequency. In each test the results must not exceed the limit stated in table-1(See last post).
The purchaser can specify the testing frequencies for chemical limits or the frequencies specified before can be used for these tests.
The chemical limit test is specified as option in this standard. But purchaser can specify to test for these limits.
Table-2: optional limits for chemical content in wash water