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Determination of Water-to-Binder Ratios on the Equivalent Compressive Strength of Concrete with Supplementary Cementitious Materials
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 Title & Authors
Determination of Water-to-Binder Ratios on the Equivalent Compressive Strength of Concrete with Supplementary Cementitious Materials
Yoon, Hyun-Sub; Yang, Keun-Hyeok;
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 Abstract
The present study proposed a k-value to determine the water-to-binder ratio of concrete using fly ash (FA) or ground granulated blast-furnace slag (GGBS) as a partial replacement of ordinary portland cement (OPC) with regard to an equivalent strength of OPC concrete. From the regression analysis using an extensive database including 7076 concrete mixes, k-values were determined for various water-to-binder ratios when the replacement ratio of OPC by the addition of FA or GGBS were below 50%. For deriving an equation to identify k-value, the relationship of concrete compressive strength and water-to-binder ratio was generalized by an exponential function. In general, k-values decreased with the increases in the addition of FA or GGBS for replacement of OPC and water-to-binder ratio. The rate in decreasing k-value against water-to-binder ratio was marginally affected by the addition of FA or GGBS, although a higher k-value was commonly obtained for GGBS concrete than for FA concrete at the same water-to-binder ratio. Consequently, the determined k-values were simplified as a function of water-to-binder ratio and the addition ratio of FA or GGBS as replacement of OPC.
 Keywords
equivalent compressive strength;k-value;water-to-binder ratio;fly ash;slag;
 Language
Korean
 Cited by
 References
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