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Mechanism of Influence of Low Atmosphere Pressure on Pore Structure of Air-Entraining Mortar in Plateau Region
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Zhenxing DU1, Wei SHE1, Wenqiang ZUO1, Penggang WANG2
Journal of the Chinese Ceramic Society | 2023, 51(5) : 1174 - 1180
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Journal of the Chinese Ceramic Society | 2023, 51(5): 1174-1180
• Research Articles •
Mechanism of Influence of Low Atmosphere Pressure on Pore Structure of Air-Entraining Mortar in Plateau Region
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Zhenxing DU1, Wei SHE1, Wenqiang ZUO1, Penggang WANG2
Affiliations
  • 1.Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
  • 2.Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China

    • DU Zhenxing (1991-), male, Doctoral candidate. E-mail:

About Author:

DU Zhenxing (1991-), male, Doctoral candidate. E-mail:

Published: 2023-05-20 doi: 10.14062/j.issn.0454-5648.20220808
Outline
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The low atmosphere-pressure in plateau regions will affect the bubble stability, thus affecting the air-void structure and frost resistance of air-entrained concrete. The effect of atmosphere pressure on the pore structure of freshly mixed air-entraining mortar was investigated via constructing a self-built low atmosphere pressure mixing device. The results show that the decrease of atmosphere pressure can decrease the initial air content of air-entrained mortar, increase the bubble spacing coefficient as well as air content loss through time, and deteriorate the pore structure. The mechanism of low atmosphere pressure effect on the pore structure of air-entrained mortar is mainly since the reduced atmosphere pressure accelerates the Ostwald ripening process of the bubble system, which makes the small bubbles smaller until they disappear and the large bubbles larger until they break, and the average pore size of the bubble system increases, thus accelerating the destabilization rate of the bubble system. These findings have important implications for understanding the mechanism of bubble destabilization under a low atmosphere pressure and developing the corresponding bubble stabilization techniques.

low atmosphere pressure  /  air-entraining mortar  /  bubble stability  /  air-void structure
杜振兴, 佘伟, 左文强, 王鹏刚. 高原低气压环境对引气砂浆孔结构的影响机理. 硅酸盐学报, 2023 , 51 (5) : 1174 -1180 . DOI: 10.14062/j.issn.0454-5648.20220808
Zhenxing DU, Wei SHE, Wenqiang ZUO, Penggang WANG. Mechanism of Influence of Low Atmosphere Pressure on Pore Structure of Air-Entraining Mortar in Plateau Region[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (5) : 1174 -1180 . DOI: 10.14062/j.issn.0454-5648.20220808
Appendix
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Year 2023 volume 51 Issue 5
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Article Info
doi: 10.14062/j.issn.0454-5648.20220808
  • Receive Date：2022-09-30
  • Online Date：2026-10-20
  • Published：2023-05-20
Article Data
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History
  • Received：2022-09-30
  • Revised：2022-10-14
Funding
Affiliations
    1.Jiangsu Key Laboratory of Construction Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
    2.Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China

Corresponding:

SHE Wei (1986-), male, Ph.D., Professor. E-mail:
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表12种不同金属材料的力学参数
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Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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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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