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- W3045277291 endingPage "120097" @default.
- W3045277291 startingPage "120097" @default.
- W3045277291 abstract "This work aimed to improve the setting behavior and strengths of cement paste/mortar with ethylene and vinyl acetate copolymer redispersible powder (EVA-DP) using C-S-H seeds and polycarboxylate superplasticizer (C-S-Hs-PCE) and meanwhile explore the reasons for these two improvements by means of the heat flow, water requirement, air content, apparent density and pore size distribution. The experimental results show that C-S-Hs-PCE used in this work notably cuts down the setting behavior and increases the strengths at 3d of mortars with EVA-DP; however, less than 2% C-S-Hs-PCE hardly increases their strengths at 28d. C-S-Hs-PCE promotes the hydration of paste with EVA-DP in several manners; it enhances heat flow in the first deceleration period, the initial several hours in the acceleration period and at the main exothermic peaks/merged peak, or advances the onset of the acceleration period, or shifts the maximum of the hydration rate to earlier time. This promotion in the hydration at different levels is the reason for the shortened setting behavior of paste with EVA-DP in the presence of C-S-Hs-PCE. Except for the promoted hydration, the increased apparent density resulted from lowered water requirement, as well as the less pores, especially the middle and large capillary pores, are the other main contributors to the increment in the strengths of mortar with EVA-DP and C-S-Hs-PCE, especially the strengths at 28d of the mortars with 6% and 10% EVA-DP and 2% C-S-Hs-PCE." @default.
- W3045277291 created "2020-07-29" @default.
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- W3045277291 date "2020-11-01" @default.
- W3045277291 modified "2023-10-10" @default.
- W3045277291 title "Improvements in setting behavior and strengths of cement paste/mortar with EVA redispersible powder using C-S-Hs-PCE" @default.
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- W3045277291 doi "https://doi.org/10.1016/j.conbuildmat.2020.120097" @default.
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