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- Title
冻融循环条件下路面粉煤灰混凝土损伤检测研究.
- Authors
袁茂林
- Abstract
Aiming at the problem of low detection accuracy of the existing damage detection methods, the optimization design of the damage detection method of fly ash concrete on pavement is realized on the premise of fully considering the freeze-thaw cycle. According to the principle of freeze-thaw cycle, the damage process of fly ash concrete is simulated. The acoustic data of concrete are measured by ultrasonic pulse wave at the position where concrete may be damaged. The mechanical strength attenuation damage of concrete is calculated from three aspects; elastic modulus, shear modulus and fracture energy, and the damage of concrete is measured according to ultrasonic acoustic data. By locating the damage fault position, the damage detection results of fly ash concrete on pavement are obtained. The results show that the detection errors of the damage detection method in both mechanical damage and structural damage are lower than the preset values, and the detection accuracy meets the design and application requirements.
- Subjects
CONCRETE pavements; FLY ash; MODULUS of rigidity; ULTRASONIC waves; FREEZE-thaw cycles; ELASTIC modulus
- Publication
Fly Ash Comprehensive Utilization, 2023, Vol 37, Issue 4, p74
- ISSN
1005-8249
- Publication type
Article
- DOI
10.19860/j.cnki.issn1005-8249.2023.04.013