Concrete pumping and its effect on the air void system

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  • Research - Concrete Pumping Effects on Entrained Air-Voids ...

    Jul 02 1994 · The actual effect of pumping on the air content measured for the concrete is not consistent; in some cases air content has increased while in others it has decreased. Previous work has shown that pumping causes pressure in the concrete and this pressure can alter the air-void system.

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  • Concrete pumping and its effect on the air void system ...

    Jul 05 2018 · The particular effect of pumping on changes in the concrete air void system has been investigated in the past [ 5 6 7 8 9 10 ]. The general belief within the North American concrete industry is that pumping reduces air content by two or three percent [ 11 ].

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