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作者:

Liu, Xiao (Liu, Xiao.) (学者:刘晓) | Guan, Jianan (Guan, Jianan.) | Lai, Guanghong (Lai, Guanghong.) | Wang, Ziming (Wang, Ziming.) | Zhu, Jie (Zhu, Jie.) | Cui, Suping (Cui, Suping.) (学者:崔素萍) | Lan, Mingzhang (Lan, Mingzhang.) | Li, Huiqun (Li, Huiqun.)

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摘要:

A novel star-shaped polycarboxylate superplasticizer (SPCE) was synthesized through a simple two-step method. H-1 Nuclear Magnetic Resonance (H-1 NMR) and Infrared Spectroscopy (IR) measurements were used for structural characterization. SPCE and comb-shaped polycarboxylate superplasticizer (CPCE) with same molecular weights were designed and synthesized. The cement paste containing SPCE exhibited better fluidity, fluidity retention, water reduction, 25% lower saturated dosage of PCE, 10% longer setting time, lower hydration heat, more delayed hydration heat evolution and lower amount of hydration products at early ages. Furthermore, the adsorption behavior of SPCE and CPCE in cement pastes and the zeta potential were investigated, and then the working mechanism of SPCE was theoretically explained. It is interesting that changing topological structure from comb-shape to star-shape can achieve the optimization of dispersion effect, and further improve the working effectiveness. The aims of this study are to provide a new avenue to synthesize superplasticizer with novel structure achieving the chemical diversity of superplasticizer structure, and to verify the contribution of optimizing molecular shape. This new type of superplasticizer can be used as a rheology modifying agent in fresh cement-based materials. (C) 2017 Elsevier Inc. All rights reserved.

关键词:

Dispersion Polycarboxylate superplasticizer Structural characterization Topological structure Adsorption Cement Zeta potential

作者机构:

  • [ 1 ] [Liu, Xiao]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Guan, Jianan]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Lai, Guanghong]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Ziming]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Cui, Suping]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Lan, Mingzhang]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Li, Huiqun]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 8 ] [Zhu, Jie]Beijing BBMG Cement Energy Technol Co Ltd, Beijing 102403, Peoples R China

通讯作者信息:

  • 刘晓

    [Liu, Xiao]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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来源 :

JOURNAL OF COLLOID AND INTERFACE SCIENCE

ISSN: 0021-9797

年份: 2017

卷: 504

页码: 12-24

9 . 9 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:212

中科院分区:3

被引次数:

WoS核心集被引频次: 80

SCOPUS被引频次: 94

ESI高被引论文在榜: 0 展开所有

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