Abstract
It is well recognized that the frost deterioration of concrete is affected by its pore structure, but there is little information available with respect to the effective range size of the pore structure in the concrete body. In this paper an experimental program was conducted in order to study the frost resistance of both paste and concrete in order to clarify the range sizes of pore structure which are effective to frost deterioration. Statistics was used to analyze the experimental data. As a result the range of pore structure and its effective level on the frost deterioration were defined and given in this paper.