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Effects of Parameters of Air-Avid Structure on the Salt-Frost Durability of Hardened Concrete

1
College of Civilaviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2
Jiangsu SinoRoad Engineering Research Institute, Nanjing 211806, China
3
School of Transportation, Southeast University, Nanjing 211189, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(2), 632; https://doi.org/10.3390/app10020632
Received: 25 November 2019 / Revised: 1 January 2020 / Accepted: 9 January 2020 / Published: 16 January 2020
Through laboratory testing, this research studied the connection between air-void structures of hardened concrete and fresh concrete and discussed the effects of the air-void structure on the salt-frost durability of the concrete. The results demonstrate that, in comparison with fresh concrete, the air-void spacing factor shows a close correlation with hardened concrete air-content and decreases in the form of a power function as the air-content increases. When the fresh concrete air-content is more than 6% and the hardened concrete air-void spacing factor is less than 0.18 mm, the influence of parameters of air-void structure on the salt-frost resistance of the concrete reduces. The air-void spacing factor more significantly affects the salt-frost resistance of the concrete compared with air content and the correlation reaches 0.93. Therefore, air-content and air-void spacing factor are recommended for dual control. View Full-Text
Keywords: air-content; air-void structure; air-void spacing factor; salt-frost scaling air-content; air-void structure; air-void spacing factor; salt-frost scaling
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MDPI and ACS Style

Zhang, H.; Gao, P.; Zhang, Z.; Pan, Y.; Zhang, W. Effects of Parameters of Air-Avid Structure on the Salt-Frost Durability of Hardened Concrete. Appl. Sci. 2020, 10, 632.

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