REOLOGIA W TECHNOLOGII BETONU - Katedra Inżynierii ...

AIR-VOID STABILITY IN SELF COMPACTING CONCRETE
Summary
Ensuring an adequate stable air-void system in flowable concrete is essential to guarantee
proper resistance to freezing and thawing.
The results show that the air characteristic of SCC can be similar to those found for normalslump
concrete. In general, greater air-void system can be obtained when the SCC is proportioned
with a higher content of cementations materials and a lower water-cementations materials ratio
(w/cm). To prevent coalescence of small air bubbles during agitation, the plastic viscosity and yield
stress values should not exceed 10 Nms and 2 Nm respectively. Such limits are also shown to yield
greater air-void stability after 95 min occasional agitation.
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