engleski

Influence of slag on durability of calcium aluminate cement concrete

The durability of calcium aluminate cement (CAC) in aggressive environments is often correctly cited as one of the greatest advantages of this material. An inevitable phenomenon in the hydration of calcium aluminate cement is the conversion process that increases the porosity of the cement matrix and impairs the durability of the calcium aluminate cement-based concrete. The addition of slag reduces the negative impact of the conversion process, and thus no significant change in the porosity of the cement matrix should be expected. The aim of this preliminary study is to provide an insight into the basic durability properties of calcium aluminate cement with and without slag addition. For this purpose, a set of durability properties of calcium aluminate cement concrete with 30% cement replacement by granulated blast furnace slag were tested and compared with those of a pure calcium aluminate cement concrete. The studied properties were water permeability, chloride diffusion, carbonation, gas permeability and freeze-thaw The results presented in the study serve to further focus on specific applications of such a material.

calcium aluminate cement, slag, durability, porosity, conversion process

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