ASTM C70-20 PDF Download

The ASTM C70-20 standard provides a procedure for determining the amount of surface moisture in fine aggregate through displacement in water. This test method is particularly useful in situations where drying facilities are not available and accurate information on the bulk specific gravity of the material in a saturated surface-dry condition is known.

The test method has several applications, including adjusting the aggregate mass for moisture content and determining the contribution of surface moisture to the mixing water in portland cement concrete. This means that it can be used to ensure that the moisture content of the fine aggregate is accounted for in concrete production.

It is important to note that while this test method provides a convenient means for on-site or plant determination of moisture content, it is not widely used and its accuracy depends on the accuracy of the information on the bulk specific gravity of the material.