Study On The Carbonation And The Air Permeability Of Concrete

For the importance of concrete structure durability, this paper analyses such factors as carbonation performance and air permeability performance of concrete that reduce concrete durability. Based on the summary of forefathers work, this paper increases content scope of compound material and W/C, studies in different ages the relation between concrete carbonation and such factors as W/C(0.4,0.45,0.5,0.55) , fly-ash (0, 20%, 30%, 40%, 50%) .cement (525#P.O and 425#P. S) ; this paper studies the influence on concrete permeability of W/C(0.4,0.45,0.5,0.55) , fly-ash (0, 20%, 30%, 40%, 50%) , cement (525#P.O and 425#P. S) ; this paper studies reasonable content of fly-ash and optimal content of fly-ash satisfying work need; this paper searches for the relation among 28d compressive strength, carbonation and air permeability; this paper validates applied formula X=atb which estimates carbonation depth domestic; this'paper searches for the relation between concrete carbonation and air permeability.