Influence Factors Of Frost Resistance On Pervious Concrete

Pervious concrete pavement as a kind of environmental protection pavementconcrete, has been widely used in city parks and non-maneuvering sidewalks.High-strength and high-performance pervious concrete has also been used in urbantrunk road, but the reserches on frost resistance of pervious concrete is stillinsufficient. In the winter season of north area China, with De-icing salt water flowson both sides’ concrete material, making concrete’s freezing damage with saltwater’s effect. So it is very necessary research on the pervious concrete’s frozenresistant performance with salt participate.This paper researched on concrete strength and permeability coefficient ofpervious concrete, analysed concrete performance and quality loss of perviousconcrete in salt freezing environment, acquired the methods of evaluation of thedestruction in salt freezing environment. Researched on the influencing factors andregular pattern of pervious concrete’s antifreezing (salt frozen) ability; Usestatistical methods to analyzes the regular pattern between parameter andperformance of pervious concrete’s antifreezing ability.The research shows that the key factors on frost resistance ability of perviousconcrete are water cement ratio, aggregate size, quality ratio of paste to aggregate,sand ratio, mineral admixtures, and air-entraining agent etc. Effective way toanalysis the antifreezing ability of pervious concrete is to use the methods in GB/T50082-2009with evaluation of quality loss; Statistical analysis is helpful to analysisthe performance of permeable concrete, which helps to design pervious concretewith good antifreezing ability.