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- W2022341377 abstract "It is well-established that a competitive adsorption exists between polycarboxylate superplasticizers (SP) and sulfate ions solubilized in the interstitial solution of cement paste, which may cause a loss of the dispersing properties. This has been explained by competitive weak ionic interactions between functional carboxyl groups and sulfate ions with cement grains. In this study, SPs including trialkoxysilane functional groups have been synthesized. Adsorption and dispersing properties of these SPs were evaluated in the presence of different concentrations of Na2SO4 added in aqueous solution. It appeared that a partial substitution of carboxyl groups by trialkoxysilane in the polymer makes them more resistant to sulfate ions. We suggested that the high adsorption capacity of these SPs results from the formation of strong bonds between hydroxysilane groups and calcium silicate hydrate phases. The improved compatibility of these new silylated SPs has been demonstrated through the formulation of two different concrete equivalent mortars." @default.
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- W2022341377 date "2012-01-01" @default.
- W2022341377 modified "2023-10-17" @default.
- W2022341377 title "A new class of organosilane-modified polycarboxylate superplasticizers with low sulfate sensitivity" @default.
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- W2022341377 doi "https://doi.org/10.1016/j.cemconres.2011.09.006" @default.
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