Abstract
The chloride‐induced corrosion of reinforcing steel is the major reason for the premature deterioration and degradation of field concrete structures built in a salt‐laden environment. The results of investigation of the bituminous addition effect on Portland cement concrete resistance to chloride ions penetration are presented in this paper. Chloride penetration was simulated by subjecting samples to cyclic loading with salt solution and drying. Concrete resistivity development was monitored during 12 months. The test results have been analysed to verify the effect of addition content, the time of exposure in aggressive environment, as well as the sort of cement on chloride ion permeability of Portland cement concrete. The statistical analysis showed that bituminous addition significantly improves the concrete resistance to chloride salt solution penetration.
Highlights
The ingress of chloride ions into concrete plays a crucial role in reinforcing bar corrosion and, in durability and life of structures
The present investigation was carried out with an objective to assess the concrete modified by bituminous addition resistance to chloride ions penetration
The influence of bituminous addition on the concrete permeability was evaluated on the ground of long-term monitoring of resistivity development of the material subjected to cyclic wetting and drying
Summary
The ingress of chloride ions into concrete plays a crucial role in reinforcing bar corrosion and, in durability and life of structures. In case of high-way structures and bridges, this can be caused by de-icing salts Another source of chloride ions is sea water in contact with concrete. The transport of chlorides in concrete is influenced strongly by the exact sequence of wetting and drying. This sequence varies from location to location, depending on the wind, exposure to the sun and the shape and usage of the construction. The present investigation was carried out with an objective to assess the concrete modified by bituminous addition resistance to chloride ions penetration. The influence of bituminous addition on the concrete permeability was evaluated on the ground of long-term monitoring of resistivity development of the material subjected to cyclic wetting and drying
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