On the mechanism of using carbon dioxide as a beneficial concrete admixture

The addition of carbon dioxide into fresh ready mixed concrete has been observed to produce a measurable increase in hydration and a significant compressive strength increase. An optimal dose introduced during batching and mixing of ready mixed concrete imparts physiochemical changes to the early hydration. The mechanistic basis for macroscopic performance changes was investigated through the study of a model tricalcium silicate system. A C3S …