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- W3026420977 abstract "Air-void characteristics in self-consolidating concrete (SCC) depend on the efficiency of air-entraining agent (AEA) used to stabilize the air-bubbles in the presence of other admixtures, such as high-range water reducer (HRWR) and viscosity-modifying admixture (VMA). An experimental investigation was carried out to evaluate the effect of HRWR-VMA-AEA combinations and shear mode on stability of air-void system (AVS) in SCC. The obtained test results showed that the AVS characteristics are highly affected by the HRWR-AEA combination, presence of VMA, and shear regimes. Under dynamic shear mode (5.7 s−1), the use of polycarboxylate HRWR (PC) type resulted in relatively higher air loss and spacing factor than polynaphthalene sulfonate type. A reduction of air content of up to 3.0% can be observed. However, the use of PC in combination with VMA resulted in better stability of AVS. Good correlation between the spacing factors determined using the air-void analyzer (AVA) and SAM test methods are established. Typical SAM numbers to achieve a spacing factor lower than 200 μm are proposed." @default.
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- W3026420977 date "2020-08-01" @default.
- W3026420977 modified "2023-10-18" @default.
- W3026420977 title "Effect of HRWR-VMA-AEA combinations and shear on air-void characteristics in self-consolidating concrete" @default.
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- W3026420977 doi "https://doi.org/10.1016/j.conbuildmat.2020.119192" @default.
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