Durability and reinforcing steel corrosion of high performance self-consolidating concrete

Abouhussien, Ahmed Abdallah (2013) Durability and reinforcing steel corrosion of high performance self-consolidating concrete. Masters thesis, Memorial University of Newfoundland.

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Abstract

This study investigated the strength and durability of high performance self-consolidating concrete (HPSCC) incorporating metakaolin. The statistical design of experiments was utilized to study the effects of mixture proportions and curing conditions on the performance of HPSCC. A total of 9 mortar, 26 concrete mixtures, and 80 prism samples were tested. The first stage compared the strength and durability of mortars containing metakaolin to other supplementary cementitious materials (SCM’s). The second stage tested 20 HPSCC mixtures to optimize the fresh, hardened, and durability properties, and the service life time of the HPSCC mixtures. The optimum HPSCC mixture with metakaolin was then compared to an additional three HPSCC mixtures containing different SCM’s and to two normal concrete (NC) mixtures. Finally, the third stage involved testing 80 prism samples using an accelerated corrosion test method under ten alternative curing techniques. The results of this investigation yielded an optimum HPSCC mixture with a total binder of 490 kg/m³, a water-to-binder ratio of 9.39, and a 19.9% replacement proved to be the most significant variable affecting the chloride permeability, decline of permeability over time, ad the service life time of the structure.

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