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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: A Novel Type of PCE Possessing Silyl Functionalities
Author(s): Julia Witt and Johann Plank
Publication: Special Publication
Appears on pages(s): 1-14
Keywords: polycarboxylate, cement, silane, concrete
Abstract:A series of silylated PCE polymers was prepared by aqueous free radical copo¬lymerization using methacrylic acid, ω-methoxy poly(ethylene glycol) methacrylate ester and N-maleic γ-aminopropyl triethoxy silane (MAPS). The resulting copolymers possess silanol groups from alkaline hydrolysis of the triethoxy silane functionality in cement pore solution and thus can chemically interact with C-S-H phases. It was found that incorpora¬tion of MAPS significantly enhances the dispersing performance of ready mixed type PCEs possessing high grafting density while no improvement was observed for low grafted PCEs common in precast concrete. Adsorption tests revealed that MAPS increases adsorption of highly grafted PCEs, while adsorption of pre-cast type PCEs remains unaffected or even decreases.
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