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Dr. KANG YANG
School of Civil Engineering, Chongqing Jiaotong University

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0 Acoustic Emission
0 Civil Engineering
0 nondestructive testing
0 asphalt concrete
0 source location

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Journal article
Published: 23 July 2021 in Materials
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In this study, the semicircle three-point bending tests of ordinary asphalt concrete and basalt fiber asphalt concrete were carried out and acoustic emission parameters were collected during the test. The differences of the characteristics of acoustic emission parameters between basalt fiber asphalt concrete and ordinary asphalt concrete were analyzed, and the damage stages were divided based on the variation of acoustic emission parameters; Rise Angle and Average Frequency were introduced to study the cracking mode and crack resistance mechanism of asphalt concrete with basalt fiber. The results show that the acoustic emission parameters can well represent the toughening and crack resistance effect of basalt fiber in asphalt concrete, and the damage stages can be divided into three stages: microcrack initiation stage, fracture stage, and residual stage. The duration of the fracture stage and the load resistance time of the specimen were greatly prolonged. The proportion of shear events in the whole failure process increased greatly after the basalt fibers were added, especially in the fracture stage, which reduced the tensile failure tendency of the specimens, and thus improved the bending and tensile performance of the specimens and played a toughening and crack resistance role in the fracture stage.

ACS Style

Kang Yang; Zhaoyi He; Dongxue Li; Hao Xu; Lin Kong. Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission. Materials 2021, 14, 4096 .

AMA Style

Kang Yang, Zhaoyi He, Dongxue Li, Hao Xu, Lin Kong. Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission. Materials. 2021; 14 (15):4096.

Chicago/Turabian Style

Kang Yang; Zhaoyi He; Dongxue Li; Hao Xu; Lin Kong. 2021. "Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission." Materials 14, no. 15: 4096.

Journal article
Published: 09 September 2020 in Sustainability
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The accurate localization of an acoustic emission (AE) source is a vital aspect of AE nondestructive testing technology. A model of wave velocity attenuation caused by the extension of transmission distance is established to analyze the attenuation of AE wave velocities in concrete and thus improve the acoustic source localization accuracy from the perspective of modified velocity. In combination with the exhaustive and region localization methods, a region exhaustive localization method is established based on the modified wave velocity. The results indicate that the smaller the water–cement ratio, the larger the reference wave velocity, and the spatially dependent attenuation of wave velocity increase. Moreover, the larger the aggregate particle size, the larger the reference wave velocity, and the greater the attenuation of wave velocity with distance. For a propagation distance of 1000 mm, the AE wave velocity attenuation exceeds 50% compared with the AE velocity. The optimized localization method reduces the number of nodes calculated, thus improving the method’s accuracy when used for localization.

ACS Style

Dongxue Li; Kang Yang; Zhaoyi He; Hanlin Zhou; Jiaqi Li. Acoustic Emission Wave Velocity Attenuation of Concrete and Its Application in Crack Localization. Sustainability 2020, 12, 7405 .

AMA Style

Dongxue Li, Kang Yang, Zhaoyi He, Hanlin Zhou, Jiaqi Li. Acoustic Emission Wave Velocity Attenuation of Concrete and Its Application in Crack Localization. Sustainability. 2020; 12 (18):7405.

Chicago/Turabian Style

Dongxue Li; Kang Yang; Zhaoyi He; Hanlin Zhou; Jiaqi Li. 2020. "Acoustic Emission Wave Velocity Attenuation of Concrete and Its Application in Crack Localization." Sustainability 12, no. 18: 7405.