Comb-typed polycarboxylate superplasticizer equiped with hyperbranched polyamide teeth
Autor: | Jianhui Li, Qiu-Hui Zhu, Yong-Xin Yu, Min Xuemei, Zhao Xiufeng, Zhang Lizhong |
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Rok vydání: | 2018 |
Předmět: |
Cement
Materials science 0211 other engineering and technologies Superplasticizer 02 engineering and technology 021001 nanoscience & nanotechnology Cement paste Polyester Colloid and Surface Chemistry Compressive strength 021105 building & construction Polyamide Composite material 0210 nano-technology |
Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 553:272-277 |
ISSN: | 0927-7757 |
Popis: | The well designed comb-typed polycarboxylate superplasticizer has been proved as an efficient water reducing agent to improve the concrete’s workability. However, the reliability of such an architecture is still challenged due to delay of cement hydration and the resulting weak early-age compressive strength of the concrete. Building on this, we report the discovery of a novel comb-type polycarboxylate with hyperbranched polyamide in the side chains. Compared to the original polycarboxylate, the designed “poly(amide-ester)” one shows significantly enhanced early strength of the concrete and better retarding performance. The introduction of hyperbranched polyamides in the polyester comb favors obvious steric hindrance, accelerated fluidity of cement paste and improved compressive strength, which further opens a new line of inquiry in superplasticizer material design. |
Databáze: | OpenAIRE |
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