Effect of Siliceous Surface Protective Agents on frost Resistance og High-strength Concrete to which Pressurization and Out-door Exposure Were Done

Abstract

Although the high-strength concrete are evaluated as having excellent frost resistance is researched that there are some high-strength concrete those frost resistance damage fell steeply,if the same freezing and thawing tests is done after doing out-door and in-door exposure.Thus,the occurrence of minute cracck is thought as a cause in concrete.On the oter hand,it is developed to siliceous surface protevtive aggents with an effect of the filling and a watwe-repellent effect of the craack,and it is expevted that frost resistance improve.In this research,the freezing and thawing tests is done to concrete that causes the crack because of dynamic and the out-of-door exposure,and the effect of the siliceous surfacce protevtive is examined.