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It is of great significance for the optimization and performance improvement of aggregates to investigate the influence of aggregate chemical properties on the nucleation and growth of calcium silicate hydrate (C-S-H) and its mechanism. In this work, limestone, quartz and magnesite were used as aggregates. The interactions between different aggregates and ions in a simulated solution were determined via zeta potential measurement. Also, the nucleation and growth of C-S-H on the surface of these aggregates were analyzed by scanning electron microscopy. The hydration heat of cement pastes with the micro-aggregates was examined to investigate the effect of aggregate chemical properties on the early hydration of cement. The results show that limestone surface has a strong adsorption of Ca2+ (i.e., chemical adsorption), leading to a high density of C-S-H nuclei and directional growth of C-S-H, and thus greatly promoting the hydration of cement. The adsorption of Ca2+ on quartz surface is due to electrostatic force, which is weaker than that due to the chemical adsorption. The density of C-S-H nuclei on quartz surface is thus much lower than that on limestone surface. In the case of magnesite, its surface has a high affinity for SO42- rather than Ca2+, reducing the nucleation density of C-S-H on the surface of magnesite, and thus slowing down the early hydration of cement.

, authors=Xiaowei OUYANG1, Shida XU1, Yuwei MA1, Guang YE2, authorsList=Xiaowei OUYANG, Shida XU, Yuwei MA, Guang YE, authorCompany=null, correspAuthors=null, authorNote=

OUYANG Xiaowei (1987-), male, Ph.D., Associate Professor. E-mail:

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探究集料化学特性对水化硅酸钙(C-S-H)成核和生长的影响及其作用机理对集料优选和性能改善意义重大。选用石灰石、石英石和菱镁石为研究对象,通过测量3种集料的粉末颗粒在模拟溶液中的zeta电位,研究了集料表面与模拟溶液中离子间的相互作用;采用扫描电子显微镜观察了C-S-H在这些集料表面的成核和生长。采用水化热的方法,研究了集料的化学特性对水泥早期水化的影响。结果表明:石灰石表面对Ca2+有极强的吸附作用(化学吸附),这使得C-S-H在石灰石表面成核密度高且生长具有方向性,从而极大地促进了水泥的水化;石英石表面通过静电力作用吸附Ca2+,该作用弱于化学吸附作用,从而使得C-S-H在石英石表面成核密度低,且呈无序和稀疏分布;菱镁石对Ca2+的吸附作用最弱而对SO42-具有很强的吸附作用,这使得C-S-H在菱镁石表面成核密度最低,从而减缓了水泥的早期水化。

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欧阳小伟(1987—),男,博士,副教授。

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集料化学特性对C-S-H成核和生长的影响
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欧阳小伟 1 , 许世达 1 , 马玉玮 1 , 叶光 2
硅酸盐学报 | 研究论文 2021,49(5): 972-979
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硅酸盐学报 |研究论文 2021 , 49 (5) : 972 -979
集料化学特性对C-S-H成核和生长的影响
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欧阳小伟1 , 许世达1, 马玉玮1, 叶光2
作者信息
  • 1.广州大学,广州大学-淡江大学工程结构灾害与控制联合研究中心,广州 510006,中国
  • 2.Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
作者简介:

欧阳小伟(1987—),男,博士,副教授。

Effect of Aggregate Chemical Properties on Nucleation and Growth of Calciun Silicate Hydrate
Xiaowei OUYANG1 , Shida XU1, Yuwei MA1, Guang YE2
Affiliations
  • 1.Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou University, Guangzhou 510006, China
  • 2.Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
  • OUYANG Xiaowei (1987-), male, Ph.D., Associate Professor. E-mail:

出版时间: 2021-05-20 doi: 10.14062/j.issn.0454-5648.20200759
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探究集料化学特性对水化硅酸钙(C-S-H)成核和生长的影响及其作用机理对集料优选和性能改善意义重大。选用石灰石、石英石和菱镁石为研究对象,通过测量3种集料的粉末颗粒在模拟溶液中的zeta电位,研究了集料表面与模拟溶液中离子间的相互作用;采用扫描电子显微镜观察了C-S-H在这些集料表面的成核和生长。采用水化热的方法,研究了集料的化学特性对水泥早期水化的影响。结果表明:石灰石表面对Ca2+有极强的吸附作用(化学吸附),这使得C-S-H在石灰石表面成核密度高且生长具有方向性,从而极大地促进了水泥的水化;石英石表面通过静电力作用吸附Ca2+,该作用弱于化学吸附作用,从而使得C-S-H在石英石表面成核密度低,且呈无序和稀疏分布;菱镁石对Ca2+的吸附作用最弱而对SO42-具有很强的吸附作用,这使得C-S-H在菱镁石表面成核密度最低,从而减缓了水泥的早期水化。

石灰石  /  石英石  /  水化硅酸钙  /  zeta电位  /  水化  /  集料  /  水泥

It is of great significance for the optimization and performance improvement of aggregates to investigate the influence of aggregate chemical properties on the nucleation and growth of calcium silicate hydrate (C-S-H) and its mechanism. In this work, limestone, quartz and magnesite were used as aggregates. The interactions between different aggregates and ions in a simulated solution were determined via zeta potential measurement. Also, the nucleation and growth of C-S-H on the surface of these aggregates were analyzed by scanning electron microscopy. The hydration heat of cement pastes with the micro-aggregates was examined to investigate the effect of aggregate chemical properties on the early hydration of cement. The results show that limestone surface has a strong adsorption of Ca2+ (i.e., chemical adsorption), leading to a high density of C-S-H nuclei and directional growth of C-S-H, and thus greatly promoting the hydration of cement. The adsorption of Ca2+ on quartz surface is due to electrostatic force, which is weaker than that due to the chemical adsorption. The density of C-S-H nuclei on quartz surface is thus much lower than that on limestone surface. In the case of magnesite, its surface has a high affinity for SO42- rather than Ca2+, reducing the nucleation density of C-S-H on the surface of magnesite, and thus slowing down the early hydration of cement.

limestone  /  quartz  /  calcium silicate hydrate  /  zeta potential  /  hydration  /  aggregate  /  cement
欧阳小伟, 许世达, 马玉玮, 叶光. 集料化学特性对C-S-H成核和生长的影响. 硅酸盐学报, 2021 , 49 (5) : 972 -979 . DOI: 10.14062/j.issn.0454-5648.20200759
Xiaowei OUYANG, Shida XU, Yuwei MA, Guang YE. Effect of Aggregate Chemical Properties on Nucleation and Growth of Calciun Silicate Hydrate[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (5) : 972 -979 . DOI: 10.14062/j.issn.0454-5648.20200759
  • 中国工程院战略咨询重点项目(2021-XZ-37)
  • 国家自然科学基金项目(52008119)
  • 广东省自然科学基金(2019A1515110799; 2021A1515012624)
  • 广州市科技计划项目(201904010290)
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2021年第49卷第5期
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doi: 10.14062/j.issn.0454-5648.20200759
  • 接收时间:2020-10-09
  • 首发时间:2026-10-30
  • 出版时间:2021-05-20
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  • 收稿日期:2020-10-09
  • 修回日期:2020-10-27
基金
中国工程院战略咨询重点项目(2021-XZ-37)
国家自然科学基金项目(52008119)
广东省自然科学基金(2019A1515110799; 2021A1515012624)
广州市科技计划项目(201904010290)
作者信息
    1.广州大学,广州大学-淡江大学工程结构灾害与控制联合研究中心,广州 510006,中国
    2.Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
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2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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