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Pore Structure Evolution of Water-Saturated Mortar Under Freeze-Thaw Cycles
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Bingyuan XING1, Pengyu CHENG2, Jipeng TANG3, Enhui XIE2, Qiang ZENG4, Chunsheng ZHOU2
Journal of the Chinese Ceramic Society | 2021, 49(2) : 331 - 339
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Journal of the Chinese Ceramic Society | 2021, 49(2): 331-339
• Research Article •
Pore Structure Evolution of Water-Saturated Mortar Under Freeze-Thaw Cycles
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Bingyuan XING1, Pengyu CHENG2, Jipeng TANG3, Enhui XIE2, Qiang ZENG4, Chunsheng ZHOU2
Affiliations
  • 1.Economic Technology Research Institute of State Grid Tianjin Electric Power Company, Tianjin 300171, China
  • 2.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
  • 3.State Grid Tianjin Electric Power Company, Tianjin 300151, China
  • 4.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

    • XING Bingyuan (1992-), male, Master. E-mail:

About Author:

XING Bingyuan (1992-), male, Master. E-mail:

Published: 2021-02-20 doi: 10.14062/j.issn.0454-5648.20200398
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To reveal the evolution of pore structure damage of cement-based materials under cyclic freeze-thaw (F-T) loads, a typical white cement mortar was used as a research object, and the pore structure of the mortar saturated with water under certain F-T cycles was characterized by the low-field magnetic resonance (LF-NMR) spectroscopy. Mortar specimens were cured at 20℃ and 80℃ to yield the different initial pore structures, and suffered from fast and low F-T loads. The results show that the F-T resistance of mortar decreases, the distributions of the gel pores and the macro-capillary pores increase, but those of the meso-capillary pores maintain when curing in hot water at 80℃. By contrast, F-T load has a slight impact on the gel pores and macro-capillary pores, and enhances the distribution of micro-cracks. The rate of rising the micro-cracks under F-T loads for the mortar specimens cured at 80℃ is greater than that for the mortar specimens cured at 20℃. F-T rate has little influence on the pore structure evolution of the mortar. The micro-crack ratio is bi-linearly related to the mass loss ratio. The internal deterioration and surface spalling of the mortar under F-T loads are mainly induced by the generation and development of the micro-cracks in the mortar matrix, showing no direct association with the gel pores and macro-capillary pores.

cement  /  mortar  /  pore structure  /  freeze-thaw resistance  /  low-field nuclear magnetic resonance
邢秉元, 程鹏宇, 唐继朋, 谢恩慧, 曾强, 周春圣. 冻融循环作用下饱水砂浆孔结构的演变规律. 硅酸盐学报, 2021 , 49 (2) : 331 -339 . DOI: 10.14062/j.issn.0454-5648.20200398
Bingyuan XING, Pengyu CHENG, Jipeng TANG, Enhui XIE, Qiang ZENG, Chunsheng ZHOU. Pore Structure Evolution of Water-Saturated Mortar Under Freeze-Thaw Cycles[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (2) : 331 -339 . DOI: 10.14062/j.issn.0454-5648.20200398
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Year 2021 volume 49 Issue 2
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Article Info
doi: 10.14062/j.issn.0454-5648.20200398
  • Receive Date：2020-06-08
  • Online Date：2026-10-30
  • Published：2021-02-20
Article Data
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History
  • Received：2020-06-08
  • Revised：2020-07-07
Funding
Affiliations
    1.Economic Technology Research Institute of State Grid Tianjin Electric Power Company, Tianjin 300171, China
    2.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
    3.State Grid Tianjin Electric Power Company, Tianjin 300151, China
    4.College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

Corresponding:

ZENG Qiang(1983-), male, Ph.D., Associate 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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