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1H low-field nuclear magnetic resonance instrument was used to continuously monitor the changes in the transverse relaxation time of white cement with silica nanoparticles with different sizes (i.e., 15 nm, 50 nm and 100 nm) from adding water to hydration for 72 h. The effect of silica nanoparticles with different sizes on the hydration process of cement was investigated. The setting time of cement paste was measured using the Vicat apparatus. The results show that the crystal nucleation of silica nanoparticles can affect the early hydration process of cement, thus breaking the flocculation structure of cement paste due to the physical adsorption and pozzolanic reaction, reducing the number of macropores, and improving the uniformity of cement paste. In addition, the smaller the silica nano particles is, the less the free water content in hydration process and the shorter the setting time will be.

, authors=Ai ZHANG, Yong GE, authorsList=Ai ZHANG, Yong GE, authorCompany=null, correspAuthors=Yong GE, authorNote=

ZHANG Ai (1992-), female, Doctoral candidate. E-mail:

, correspAuthorsNote=
GE Yong (1962-), male, Ph. D., Professor. E-mail:
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采用1H低场核磁共振仪连续监测不同粒径(15,50 nm和100 nm)纳米氧化硅对白水泥从加水到水化72 h横向弛豫时间的变化,研究不同粒径氧化硅对水泥水化过程的影响程度,最后结合维卡仪测定水泥浆的凝结时间。结果表明:纳米氧化硅的晶核作用会影响水泥的早期水化过程,还可以通过物理吸附和火山灰反应打破早期水泥浆体的絮凝结构,减少大孔隙的数量,提高水泥浆体的均质性。此外,纳米氧化硅粒径越小,水化过程中自由水含量消耗越快,表现出的凝结时间越短。

, authors=张爱, 葛勇, authorsList=张爱, 葛勇, authorCompany=null, correspAuthors=葛勇, authorNote=

张爱(1992—),女,博士研究生。

, correspAuthorsNote=
葛勇(1962—),男,博士,教授,博士生导师。
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不同粒径纳米氧化硅改性白水泥水化过程的1H低场核磁弛豫特征
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张爱 , 葛勇
硅酸盐学报 | 研究论文 2021,49(8): 1662-1669
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硅酸盐学报 |研究论文 2021 , 49 (8) : 1662 -1669
不同粒径纳米氧化硅改性白水泥水化过程的1H低场核磁弛豫特征
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张爱 , 葛勇
作者信息
  • 哈尔滨工业大学交通科学与工程学院,哈尔滨 150000
通讯作者:
葛勇(1962—),男,博士,教授,博士生导师。
作者简介:

张爱(1992—),女,博士研究生。

1H Low-Field NMR Relaxation Characteristics of Hydration Process of White Cement Modified with Silica Nanoparticles
Ai ZHANG , Yong GE
Affiliations
  • School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150000, China
  • Corresponding Author:
    GE Yong (1962-), male, Ph. D., Professor. E-mail:

    ZHANG Ai (1992-), female, Doctoral candidate. E-mail:

出版时间: 2021-08-20 doi: 10.14062/j.issn.0454-5648.20200878
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采用1H低场核磁共振仪连续监测不同粒径(15,50 nm和100 nm)纳米氧化硅对白水泥从加水到水化72 h横向弛豫时间的变化,研究不同粒径氧化硅对水泥水化过程的影响程度,最后结合维卡仪测定水泥浆的凝结时间。结果表明:纳米氧化硅的晶核作用会影响水泥的早期水化过程,还可以通过物理吸附和火山灰反应打破早期水泥浆体的絮凝结构,减少大孔隙的数量,提高水泥浆体的均质性。此外,纳米氧化硅粒径越小,水化过程中自由水含量消耗越快,表现出的凝结时间越短。

纳米氧化硅  /  白水泥  /  低场核磁共振  /  横向弛豫时间  /  水化过程

1H low-field nuclear magnetic resonance instrument was used to continuously monitor the changes in the transverse relaxation time of white cement with silica nanoparticles with different sizes (i.e., 15 nm, 50 nm and 100 nm) from adding water to hydration for 72 h. The effect of silica nanoparticles with different sizes on the hydration process of cement was investigated. The setting time of cement paste was measured using the Vicat apparatus. The results show that the crystal nucleation of silica nanoparticles can affect the early hydration process of cement, thus breaking the flocculation structure of cement paste due to the physical adsorption and pozzolanic reaction, reducing the number of macropores, and improving the uniformity of cement paste. In addition, the smaller the silica nano particles is, the less the free water content in hydration process and the shorter the setting time will be.

nano-silica  /  white cement  /  low-field nuclear magnetic resonance  /  transverse relaxation  /  hydration
张爱, 葛勇. 不同粒径纳米氧化硅改性白水泥水化过程的1H低场核磁弛豫特征. 硅酸盐学报, 2021 , 49 (8) : 1662 -1669 . DOI: 10.14062/j.issn.0454-5648.20200878
Ai ZHANG, Yong GE. 1H Low-Field NMR Relaxation Characteristics of Hydration Process of White Cement Modified with Silica Nanoparticles[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (8) : 1662 -1669 . DOI: 10.14062/j.issn.0454-5648.20200878
  • 国家自然科学基金项目(51278157)
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doi: 10.14062/j.issn.0454-5648.20200878
  • 接收时间:2020-11-24
  • 首发时间:2026-10-30
  • 出版时间:2021-08-20
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  • 收稿日期:2020-11-24
  • 修回日期:2021-01-29
基金
国家自然科学基金项目(51278157)
作者信息
    哈尔滨工业大学交通科学与工程学院,哈尔滨 150000

通讯作者:

葛勇(1962—),男,博士,教授,博士生导师。
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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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