This paper deals with the assessment of durability potential of concrete by measurement of it's absorption properties. The durability aspects covered were freeze-thaw, carbonation; chloride diffusion and abrasion. The test method for determining the absorptivity was the Initial Surface Absorption Test (ISAT), used essentially as defined in BS 1881, but with several modifications to enhance it's application as a laboratory test.

The results from accelerated carbonation, freeze-thaw attack, abrasion and chloride diffusion tests are plotted against those of the ISAT, and basic statistical analyses performed to ascertain the certainty with which these aspects of durability may be predicted from the absorption. The results obtained from different concrete types, including varying grade, workability and maximum aggregate sizes and the effect of curing are considered. In addition, the effect of PFA on co-efficient of chloride diffusion rate is discussed.