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Influence of Hydrolysis Rate of Carboxylates on Dispersion Performance of Slow-release PolycarboxylateSuperplasticizer
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Huiqun LI1, Yan YAO1, 2, Ziming WANG1, 3, Suping CUI1, 3
Journal of the Chinese Ceramic Society | 2020, 48(2) : 246 - 252
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Journal of the Chinese Ceramic Society | 2020, 48(2): 246-252
Influence of Hydrolysis Rate of Carboxylates on Dispersion Performance of Slow-release PolycarboxylateSuperplasticizer
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Huiqun LI1, Yan YAO1, 2, Ziming WANG1, 3, Suping CUI1, 3
Affiliations
  • 1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
  • 2.China Building Materials Academy, Beijing 100024, China
  • 3.National Engineering Labaratory for Industrial Big-data Application Technology, Beijing 100124, China

    • LI Huiqun (1986-), female, Ph.D. E-mail:

About Author:

LI Huiqun (1986-), female, Ph.D. E-mail:

Published: 2020-02-20 doi: 10.14062/j.issn.0454-5648.20190432
Outline
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To study the influence of unsaturated carboxylate on the dispersing and flow releasing ability of slow-release polycarboxylate superplasticizer(PCE), the hydrolysis behaviors of carboxylates in sodium hydroxide solution at pH value of 12.0 was investigated, and the constants of hydrolysis rate were derived via a linear fitting. Mini slump was used to examine the variation of flow of cement pastes containing the synthesized slow releasing PCE over time, and the results were compared and analyzed to coordinate the relationship of hydrolysis behaviors of carboxylates and slow-release effectiveness of PCE. The results indicate that PCE with the substitution of acrylic acid with 33.3% methyl acrylate and 25.0% dimethyl itaconite showed significant slow-release effect, the initial fluidity of cement paste was 149 mm and 104 mm afterwards increased to 223 mm and 212 mm after 2 h respectively. PCE with carboxylate monomer of faster hydrolysis rate exhibited quicker flow releasing property, and PCE with carboxylate monomer containing more ester grouped manifested stronger flow releasing ability, but need longer time. The flow releasing property of PCE not only depended on the hydrolysis rate and ester group amount of monomer, but also related to its reactivity of monomer to match the copolymerization system.

polycarboxylate superplasticizer  /  slow-release  /  unsaturated carboxylate  /  hydrolysis rate  /  cement fluidity
李慧群, 姚燕, 王子明, 崔素萍. 羧酸酯水解速率对缓释型聚羧酸超塑化剂分散性能的影响. 硅酸盐学报, 2020 , 48 (2) : 246 -252 . DOI: 10.14062/j.issn.0454-5648.20190432
Huiqun LI, Yan YAO, Ziming WANG, Suping CUI. Influence of Hydrolysis Rate of Carboxylates on Dispersion Performance of Slow-release PolycarboxylateSuperplasticizer[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (2) : 246 -252 . DOI: 10.14062/j.issn.0454-5648.20190432
Appendix
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Year 2020 volume 48 Issue 2
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Article Info
doi: 10.14062/j.issn.0454-5648.20190432
  • Receive Date：2019-04-18
  • Online Date：2026-10-29
  • Published：2020-02-20
Article Data
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History
  • Received：2019-04-18
  • Revised：2019-09-27
Funding
Affiliations
    1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
    2.China Building Materials Academy, Beijing 100024, China
    3.National Engineering Labaratory for Industrial Big-data Application Technology, Beijing 100124, China

Corresponding:

WANG Ziming (1963-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
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Family		 属数
Number of
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Number of
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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