AASHTO T 219-22

This test procedure is intended to serve as a reasonably accurate, fairly rapid means of determining the chemical limits of Type I hydrated lime and the particle size requirements of Types I and II hydrated lime on a routine basis (see Note).

Note—The chemical limits of Type II lime shall be determined in accordance with ASTM C25.

The entire procedure and the calculations it involves are based on certain hypothetical assumptions. Lime products by their very nature contain many ingredients other than those mentioned or considered in the test procedure. For our purposes, only the principal constituents usually present are considered. This aids greatly in the simplification of the test procedure to the obvious loss of some degree of accuracy. All test values to be reported shall be rounded off to the first decimal place. Example: percent Ca(OH)2 = 95.5 percent (rather than the 95.53 percent shown on the sample calculation sheets). The inherent accuracy obtainable through the use of this procedure is believed to be adequate for the purpose intended. The limitations of this test procedure, along with the object and intent of this same procedure, should be fully realized so that it may be evaluated as merely one approach to the problem of routine quality control.