The procedure described in this test method is intended to determine the effects of freezing and thawing on concrete units in the presence of water or saline solution.

The procedure is not intended to provide a quantitative measure to determine an expected length of service for a specific type of concrete unit.

Note 2—The testing laboratory performing this test method should be evaluated in accordance with Practice C 1093.

Note 3—Compressive strength and absorption tests should be performed on different but representative specimens. While compressive strength and absorption values by themselves have been shown by research to not be reliable indicators of durability, they have been shown to be good reference values for units manufactured from a given set of materials.

1.1 This test method covers the resistance to freezing and thawing manufactured concrete masonry and related concrete units. Units are tested in a test solution that is either water or 3 % saline solution depending on the intended use of the units in actual service. Note 1 - Concrete masonry and related concrete units include units such as hollow and solid concrete masonry units, concrete brick, segmental retaining wall units, concrete pavers, and concrete roof pavers.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.