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Hydration of Reactive Powder Concrete Matrix under Long-Term Hydrothermal Condition
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Qinyi ZHAO1, Bing HE1, Xiaoyu CUI2, Jianqiao HOU1, Chong CUI1, Hailong MA3
Journal of the Chinese Ceramic Society | 2020, 48(5) : 665 - 674
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Journal of the Chinese Ceramic Society | 2020, 48(5): 665-674
Hydration of Reactive Powder Concrete Matrix under Long-Term Hydrothermal Condition
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Qinyi ZHAO1, Bing HE1, Xiaoyu CUI2, Jianqiao HOU1, Chong CUI1, Hailong MA3
Affiliations
  • 1.Nanjing University of Science and Technology, Materials Science and Engineering, Nanjing 210094, China
  • 2.Suzhou Concrete and Cement Products Research Institute Co. Ltd, Suzhou 215004, Jiangsu, China
  • 3.Ningxia University National Preparatory School of Education, Yinchuan 750002, China

    • ZHAO Qinyi (1992-), male, Doctoral candidate. E-mail:

About Author:

ZHAO Qinyi (1992-), male, Doctoral candidate. E-mail:

Published: 2020-05-20 doi: 10.14062/j.issn.0454-5648.20190504
Outline
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A reactive powder concrete (RPC) matrix with a low water to cement ratio of 0.21 was prepared. The hydration of the RPC matrixes under long-term hydrothermal condition was investigated. The insoluble matter of the RPC matrix was examined to characterize its hydration level. The structural property of the RPC matrix was characterized using the Vickers hardness meter. The phase composition and morphology of the RPC matrix were characterized using X-ray powder diffraction and scanning electron microscopy/energy dispersive spectrometry. Under the hydrothermal condition, the hydration level of the RPC matrix increases during the autoclaved curing for 0-96 h, and the Vickers hardness of the RPC matrix also increases. The hydration rate of the RPC matrix is rather low, and the hydration of the clinker in the matrix becomes stopped during the long-term autoclaved curing (i.e., 168-312 h). In addition, there are a few crystalline hydrates in the RPC matrix cured for long-term, and the flocculent calcium silicate hydrates gel cannot be transferred to their crystalline forms due to the lack of space for the crystallization. The RPC matrix with a low water to cement ratio has a great stability under the long-term hydrothermal condition and a promising potential to be used as nuclear waste keeping materials.

low water to cement ratio  /  reactive powder concrete  /  long-term hydrothermal condition  /  hydration level  /  calcium silicate hydrates gel
赵秦仪, 何兵, 崔晓昱, 侯剑桥, 崔崇, 马海龙. 长期高温水热条件下活性粉末混凝土的水化规律. 硅酸盐学报, 2020 , 48 (5) : 665 -674 . DOI: 10.14062/j.issn.0454-5648.20190504
Qinyi ZHAO, Bing HE, Xiaoyu CUI, Jianqiao HOU, Chong CUI, Hailong MA. Hydration of Reactive Powder Concrete Matrix under Long-Term Hydrothermal Condition[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (5) : 665 -674 . DOI: 10.14062/j.issn.0454-5648.20190504
Appendix
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Year 2020 volume 48 Issue 5
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Article Info
doi: 10.14062/j.issn.0454-5648.20190504
  • Receive Date：2019-07-15
  • Online Date：2026-10-29
  • Published：2020-05-20
Article Data
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History
  • Received：2019-07-15
  • Revised：2019-09-20
Funding
Affiliations
    1.Nanjing University of Science and Technology, Materials Science and Engineering, Nanjing 210094, China
    2.Suzhou Concrete and Cement Products Research Institute Co. Ltd, Suzhou 215004, Jiangsu, China
    3.Ningxia University National Preparatory School of Education, Yinchuan 750002, China

Corresponding:

CUI Chong (1957-), male, Master, Professor. E-mail:
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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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