Many U.S. states and Canadian provinces require the performance of a salt scaling test as one of the conditions for approval of a sound-absorptive product. This test, ASTM C672 or CSA A23.2, is performed to determine the resistance of concrete exposed to freeze-thaw cycles in the presence of various de-icing road salts. When applied to a porous material, such as SoftSound, samples are submerged in a salt solution and subjected to 50 freeze-thaw cycles, after which a visual evaluation of ...This story is related to the following:Sound Absorbing Materials