Ultrasonic Propagation Characteristics and Damage Evolution of Recycled Concrete under Dynamic Loading

Abstract:

Four types of recycled concrete specimens were made for dynamic loading tests in laboratory, in order to research the ultrasonic propagation characteristics and damage evolution of recycled concrete under dynamic loading. Ultrasonic propagation parameters such as ultrasonic propagation wave time, ultrasonic velocity and ultrasonic amplitude of recycled concrete were tested synchronously while recycled concrete were loaded. Tests results show that ultrasonic propagation wave time increased with the rise of cyclic times, while ultrasonic amplitude decreased in the same time. Damage variable evolution of recycled concrete lived through obvious three stages during the loading process. The development of inner cracks of recycled concrete in loading process accordingly were the stage of the growing of original cracks, the stage of the expansion of cracks and the stage of the linkage of cracks.

• Periodical: Advanced Materials Research (Volumes 163-167)
• Pages: 956-960
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.163-167.956
• Online since: December 2010
• Authors: Xing Wen Luo, Hai Lin Yao
• Keywords: Damage Evolution, Dynamic Load, Recycled Concrete (RC), Ultrasonic Propagation

References

[1] Wan Huiwen, Shui Zhonghe, Lin Zhongshou and Xiao Kaitao: Journal of Wuhan University of Technology. 25(4)(2003), pp.17-21. (in Chinese).

[2] Ryu J S: Magazine of Concrete Research. 54(1) (2002), pp.7-12.

[3] Cao Wei: Experimental and theoretical reseach on fatigue properties of plain concrete under trial cyclic loading with constant lateral pressure. (Dalian University of Technology, Da Lian2004). (in Chinese).

[4] K.K. Phoone tal: ACI Materials Journal. 96(5)(1999), pp.568-573.

[5] Chen Yungang, Sun Zhenping and Xiao Jianzhuang: Concrete. 2(2004), pp.10-13. (in Chinese).

[6] Fan Hualin and Jin Fengnian: Chinese Journal of Rock Mechanics and Engineering. 19(4) (2000), pp.432-435. (in Chinese).

[7] Dhir R K, Limbachiya M C and Leelawat: Structures and Buildings. 134(3)(1999), p.257–274.

[8] LI Chaoyang, Song Yupu and Zhao Guofan: Journal of Dalian University of Technology. 41(3) (2001), pp.355-358. (in Chinese).

[9] Popovics s: J Amer Concrete Inst. 67(3)(1970), pp.243-248.

[10] Otsuki Nobuaki, Miyazato Shin-Ichi and Yodsudjai Wanchai: Journal of Materials in Civil Engineering. 15 (5)(2003), pp.443-451.

[11] Fatigue of materials. (Translatd by Wang Guangzhong. National Defence Industry Pros, Beijing 1999). (in Chinese).

[12] Ramsamooj D V: Innernational Journal of Fatigue. 30(4)(2002), pp.340-349.