ASTM D6023-16 PDF Download

The ASTM D6023-16 standard is a test method used to determine the density (unit weight), yield, cement content, and air content of Controlled Low-Strength Material (CLSM). It provides a procedure for measuring and calculating these properties to ensure compliance with specifications, determine mass/volume relationships or conversions, and perform quality control.

The standard emphasizes that it is not meant to predict the air content of hardened CLSM, as it may differ from the air content determined by this test method. It is part of a series of quality control tests that can be performed on CLSM during construction to monitor compliance with specification requirements. Other tests that can be used for construction control are Test Methods D4832, D6024/D6024M, and D6103.

The standard also includes guidelines for the competence of personnel performing the tests and the suitability of the equipment and facilities used. It notes that compliance with Practice D3740, which evaluates factors related to testing, sampling, and inspection, does not guarantee reliable results. The quality of results depends on various factors, and Practice D3740 only provides a means of evaluating some of those factors.

The test method is based on Test Method C138/C138M for concrete and provides formulas for calculating yield, cement content, and air content. It states that the previous terminology for the property determined by this test method was "Unit Weight," which is now referred to as "density."

Additionally, the standard discusses the guidelines for significant digits and rounding in line with Practice D6026. It notes that the procedures used for data collection, recording, and calculation in the standard represent industry standards for significant digits. However, these guidelines do not consider material variation, the purpose for obtaining the data, or any special considerations for the user's objectives.

Lastly, the standard provides clarification on the use of units. It states that the converted inch-pound units use the gravitational system of units, with pounds representing both a unit of mass (lbm) and force (lbf). Balances or scales recording pounds of mass or density in lbm/ft³ are considered acceptable within the standard.