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Freeze-Thaw Damage Characteristics of Concrete Based on Compressive Mechanical Properties and Acoustic Parameters.

Authors
  • Lv, Dongye1
  • Liu, Hanbing1
  • He, Feng1
  • Wang, Wensheng1
  • Miao, Qiang1
  • Li, Hanjun2
  • Wang, Fuen2
  • Zhao, Jing2
  • Shi, Chengwei3
  • 1 College of Transportation, Jilin University, Changchun 130025, China. , (China)
  • 2 Jilin China Railway Expressway Co., Ltd., Changchun 130052, China. , (China)
  • 3 Jilin Traffic Planning and Design Institute, Changchun 130021, China. , (China)
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Feb 22, 2024
Volume
17
Issue
5
Identifiers
DOI: 10.3390/ma17051010
PMID: 38473482
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Concrete is a versatile material widely used in modern construction. However, concrete is also subject to freeze-thaw damage, which can significantly reduce its mechanical properties and lead to premature failure. Therefore, the objective of this study was to assess the laboratory performance and freeze-thaw damage characteristics of a common mix proportion of concrete based on compressive mechanical tests and acoustic technologies. Freeze-thaw damage characteristics of the concrete were evaluated via compressive mechanical testing, mass loss analysis, and ultrasonic pulse velocity testing. Acoustic emission (AE) technology was utilized to assess the damage development status of the concrete. The outcomes indicated that the relationships between cumulative mass loss, compressive strength, and ultrasonic wave velocity and freeze-thaw cycles during the freezing-thawing process follow a parabola fitting pattern. As the freeze-thaw damage degree increased, the surface presented a trend of "smooth intact surface" to "surface with dense pores" to "cement mortar peeling" to "coarse aggregates exposed on a large area". Therefore, there was a rapid decrease in the mass loss after a certain number of freeze-thaw cycles. According to the three stages divided by the stress-AE parameter curve, the linear growth stage shortens, the damage accumulation stage increases, and the failure stage appears earlier with the increase in freeze-thaw cycles. In conclusion, the application of a comprehensive understanding of freeze-thaw damage characteristics of concrete based on compressive properties and acoustic parameters would enhance the evaluation of the performance degradation and damage status for concrete structures.

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