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Adsorption of Superplasticizer and its Effect on Viscosity of Cement-Silica Fume Paste
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Qianqian ZHANG1, Xin SHU1, Yong YANG1, Qianping RAN1, 2
Journal of the Chinese Ceramic Society | 2020, 48(11) : 1716 - 1721
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Journal of the Chinese Ceramic Society | 2020, 48(11): 1716-1721
• Special Issue for Ultra-high Performance Concrete Ⅱ •
Adsorption of Superplasticizer and its Effect on Viscosity of Cement-Silica Fume Paste
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Qianqian ZHANG1, Xin SHU1, Yong YANG1, Qianping RAN1, 2
Affiliations
  • 1.State Key Laboratory of High-Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 210008, China
  • 2.School of Materials Science and Engineering, Southeast University, Nanjing 210096, China

    • ZHANG Qianqian (1986—), female, Master, Senior Engineer. E-mail:

About Author:

ZHANG Qianqian (1986—), female, Master, Senior Engineer. E-mail:

Published: 2020-11-20 doi: 10.14062/j.issn.0454-5648.20200237
Outline
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To improve the workability of ultra-high performance concrete (UHPC), the effect of superplasticizers (i.e., carboxylic-superplasticizer and phosphonic-superplasticsizer) on the rheological properties of cement/silica fume pastes with a low water-binder ratio was investigated, and the adsorption behavior of the superplasticizers in paste, the packing density and the viscosity of interstitial solution were analyzed. The results show that the superplasticizers have a preferential adsorption behavior on different particle surfaces, and carboxylic-superplasticizer has a superior adsorption ability on cement particle surfaces, and phosphonic-superplasticsizer has a stronger adsorption ability on silica fume particle surfaces. It is indicated that for a cement paste with the similar flow spread, a lower viscosity of the interstitial solutions is the main reason for a lower viscosity of paste with carboxylic-superplasticizer rather than that with phosphonic-superplasticsizer. However, the well- dispersion of silica fume particles with phosphonic-superplasticizer can result in an increased packing density, thus leading to a lower viscosity of cement-silica paste, compared to that of paste with carboxylic-superplasticizer.

ultra-high performance concrete  /  silica fume  /  superplasticizer  /  preferential adsorption  /  packing density  /  viscosity of the interstitial solution
张倩倩, 舒鑫, 杨勇, 冉千平. 减水剂吸附行为对水泥-硅灰浆体黏度的影响. 硅酸盐学报, 2020 , 48 (11) : 1716 -1721 . DOI: 10.14062/j.issn.0454-5648.20200237
Qianqian ZHANG, Xin SHU, Yong YANG, Qianping RAN. Adsorption of Superplasticizer and its Effect on Viscosity of Cement-Silica Fume Paste[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (11) : 1716 -1721 . DOI: 10.14062/j.issn.0454-5648.20200237
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Year 2020 volume 48 Issue 11
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Article Info
doi: 10.14062/j.issn.0454-5648.20200237
  • Receive Date：2020-03-31
  • Online Date：2026-10-29
  • Published：2020-11-20
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  • Received：2020-03-31
Funding
Affiliations
    1.State Key Laboratory of High-Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 210008, China
    2.School of Materials Science and Engineering, Southeast University, Nanjing 210096, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
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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