A study on the Evaluation Method of Frost Resistance of Siding Materials Using the Critical Degree of Saturation Method

Abstract

At present,degaration of materials by frost damage is serious ploblem.Siding boards are also damaged by frost deterioration.In order to presume frost resistance of materials,it is necessary to take account of the property change of materials in actual environment.The critical degree of saturation method,which evaluates the frost resistance of materials from a comparison of the crtical degree of saturation(Scr) and water absorption(Scap) of materials,has the merit to evaluate the property change of materials easily.This study researches the influence of alternating immersion to Scr and Scap,shows a moist state under a real environment through the outdoor exposure test,and compares it with critical degree of saturtion.