Deformation and Acoustics Parameters Feature of Recycled Concrete under Cyclic Loading

Abstract:

Concrete demolition waste has been proved to be an excellent source of aggregates for new concrete production. Four types of recycled concrete specimens were made for cyclic loading tests in laboratory, in order to research the acoustics parameters and deformation feature of recycled concrete under cyclic loading. Acoustics parameters such as ultrasonic wave time, ultrasonic velocity and ultrasonic amplitude of recycled concrete were tested synchronously while recycled concrete were loaded. Test results show the evolution of fatigue total strain of recycled concrete undergoes three stages. The cycle times in the three stages accounted for 10%, 80% and 10% of the fatigue life respectively. These stages can be simulated by power function equations, first-order linear equations and exponential functions accordingly. Tests results show that wave time increased with the rise of cyclic times, while wave amplitude decreased in the same time.

• Periodical: Applied Mechanics and Materials (Volumes 80-81)
• Pages: 213-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.80-81.213
• Online since: July 2011
• Authors: Xing Wen Luo, Hai Lin Yao
• Keywords: Acoustics Parameter, Cyclic Loading, Deformation Feature, Recycled Concrete (RC)

References

[1] Valeria Corinaldesi, Mechanical and elastic behaviour of concretes made of recycled-concrete coarse aggregates , Construction and Building Materials. 24(2010)1616-1620.

DOI: 10.1016/j.conbuildmat.2010.02.031

[2] V.W.Y. Tam, K. Wang, C.M. Tam J, Assessing relationships among properties of demolished concrete, recycled aggregate and recycled aggregate concrete using regression analysis , Hazard Mater. 152(2008)703-714.

DOI: 10.1016/j.jhazmat.2007.07.061

[3] K. Rahal, Mechanical properties of concrete with recycled coarse aggregate, Build Environ. 42 (2007) 407-415.

DOI: 10.1016/j.buildenv.2005.07.033

[4] M.C. Limbachiya, E Marrocchino, A. Koulouris, Chemical–mineralogical characterisation of coarse recycled concrete aggregate, Waste Manage. 27(2007)201-208.

DOI: 10.1016/j.wasman.2006.01.005

[5] A.K. Padmini, K. Ramamurthy M.S. Mathews, Influence of parent concrete on the properties of recycled aggregate concrete, Constr Build Mater. 23(2009)829-836.

DOI: 10.1016/j.conbuildmat.2008.03.006

[6] Wan Huiwen, Shui Zhonghe, Lin Zhongshou, Xiao Kaitao, Environmental assessment for regenerated concrete Journal of Wuhan University of Technology. 25(2003)17-21. (in Chinese).

[7] J.M. Khatib, Properties of concrete incorporating fine recycled aggregate, Cem Concr Res. 35 (2005)763-769.

DOI: 10.1016/j.cemconres.2004.06.017

[8] T.C. Hansen, S.E. Hedegard, Properties of recycled aggregate concrete affected by admixtures in original concretes, ACI Journal. 81(1984)21-26.

DOI: 10.14359/10636

[9] M. Tavakoli, P. Soroushian, Strengths of recycled aggregate concrete made using field- demolished concrete as aggregate, ACI Materials Journals. 93(1996)182-190.

DOI: 10.14359/9802

[10] M.S. Rashwan, S. AbouRizk, The properties of recycled concrete, Concrete International. 19 (1997)56-60.