Abstract A natural deterioration attenuation equation was derived by analyzing the mechanism of sulfate corrosion, and a model for predicting concrete durability under sulfate corrosion was established considering the definition of concrete durability set forth in specification, i.e. the concrete life is expired if the corrosion-resistance coefficient of the concrete strength is less than 75%. The functions of such influence coefficients as the sulfate mass concentration, water-cement ratio, mineral admixture species and dosages, as well as different curing methods, were set up by choosing some key reference points. Finally, an equation of concrete durability prediction under sulfate corrosion was obtained, and the durability of concrete prepared by various cementitious materials was predicted. The results show that the composite cementitious material has a positive effect in terms of sulfate corrosion resistance. This concrete durability prediction model, which takes various factors into consideration, is easy and practical.
Abstract��
A natural deterioration attenuation equation was derived by analyzing the mechanism of sulfate corrosion, and a model for predicting concrete durability under sulfate corrosion was established considering the definition of concrete durability set forth in specification, i.e. the concrete life is expired if the corrosion-resistance coefficient of the concrete strength is less than 75%. The functions of such influence coefficients as the sulfate mass concentration, water-cement ratio, mineral admixture species and dosages, as well as different curing methods, were set up by choosing some key reference points. Finally, an equation of concrete durability prediction under sulfate corrosion was obtained, and the durability of concrete prepared by various cementitious materials was predicted. The results show that the composite cementitious material has a positive effect in terms of sulfate corrosion resistance. This concrete durability prediction model, which takes various factors into consideration, is easy and practical.
WANG Hai-Yan-1,
Chou-Wen-Ge-2,
Du-Li-Feng-1 etc
.Durability Prediction Model for Tunnel Lining Concrete Under Sulfate Corrosion[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(3): 91-94
2014, Vol. 51 