A Multi-factors Model for Predicting the Resistance of Chloride Penetration of Concrete with Mineral Admixtures

A high-order multi-factors model for predicting the resistance of chloride penetration of concrete with mineral admixtures was developed in this paper. The concrete specimens with different water-binder ratios, replacement of mineral admixtures, replacement of manufactured sand and replacement of coarse aggregates were prepared by orthogonal test design, whose 6h electric fluxes were tested after curing 28d. According to the influence of different factors on the electric flux of concrete, some multi-factors models for predicting the resistance of chloride penetration of concrete with mineral admixtures were proposed. The results show that the resistance of chloride penetration of concrete could be improved by increasing the replacement of fly ash and decreasing the replacement of GGBS, and the highorder multi-factors model proposed is better than the models without high-order terms in predicting the resistance of chloride penetration of concrete with mineral admixtures.