Experimental Research for Flexibility Properties of RC Beams Strengthened with Steel Wire-Polymer Mortar

Abstract:

This paper presents the results of the experimental investigation on the flexural performance of beams strengthened with steel wire-polymer mortar. A total of five rectangular doubly RC beams were constructed and tested to failure. The test variables were numbers of reinforcement layers and configuration. A new accurate method to measure elongation of steel wire was proposed. Then the interfacial bond strength between concrete and polymer mortar was tested. The failures of the specimens were all bending failures and polymer mortar layer debonded from beam was not occurred. Only a few wires were pulled off in failure. The polymer mortar and concrete has a better bonding effect. Steel wires play the more effective tensile roles of themselves. After strengthened, the RC beams improve their bending bearing capacity and bending stiffness, delay the cracks occur and crack development.

• Periodical: Applied Mechanics and Materials (Volume 238)
• Pages: 185-189
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.238.185
• Online since: November 2012
• Authors: Chi Yun Zhao, Shi Min Huang, Qiu Lai Yao, Ya Jing Chen
• Keywords: Experiment, Flexural Performance, Interfacial Bond Strength, Polymer Mortar, Reinforced Concrete (RC) Beam, Strengthening

References

[1] J. Nie, H. Wang, T. Zhang et al: Experimental study on flexural behavior of RC beams strengthened with stainless steel wire mesh and permeability polymer mortar, Journal of Building Structures, 26 (2005) 1-9.

[2] J. Nie, Q. Cai, T. Zhang, H. Wang et al: Experimental study on shear behavior of RC beams strengthened with stainless steel wire mesh and permeability polymer mortar, Journal of Building Structures, 26 (2005) 10-14.

[3] Z. Cao, A. Li and Y. Wang: Experimental study on beam-column connections strengthened with high-strength steel wire mesh and polymer mortar, Journal of Building Structures, 27 (2006) 10-15.

[4] Z. Cao, A. Li and Y. Wang: Experimental study on beam-column joints with floor slab and transverse beams strengthened with high strength steel wire mesh and polymer mortar, Journal of Building Structures, 28 (2007) 130-136.

[5] B. Liu, G. Xing and T. Zhu: Experimental investigation and finite element simulation about RC T-beams strengthened with wire cable mesh and polymer mortar, Journal of Xi'an University of Architecture & Technology, 38 (2006) 103-108.

[6] D. Logan and S. P. Shah: Moment capacity and cracking behaviour of ferrocement in flexure, Journal of the American Concrete Institute, 70 (1973) 799-804.

[7] I. A. Basaunbul, A. Gubati, Al-Sulaimani et al: Repaired reinforced concrete beams, ACI Material Journal, 87 (1990) 345-354.