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2019

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Compressive strength

Civil Engineering

Graduate Theses and Dissertations

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Air Void Clustering In Retempering Concrete And Its Contribution To Compressive Strength, Wen Sun Jan 2019

Air Void Clustering In Retempering Concrete And Its Contribution To Compressive Strength, Wen Sun

Graduate Theses and Dissertations

Air void clustering is a phenomenon in concrete in which air bubbles accumulate around the coarse aggregate. It is considered as a major cause of reduction of concrete strength.

This thesis focuses on the effect of different variables on air void clustering and its contribution to the performance of concrete. Six variables were considered in the study, including cement type (low alkali cement and TIL cement), fly ash (fly ash A and B), coarse aggregate type (lime stone and river gravel), chemical admixture type (admixture 1 and 2) , mixing water temperature (70℉ and 90℉), and retempering (with and without). A ...