Study on Shear Behavior of Concrete-polymer Cement Mortar at Elevated Temperature

Khuram Rashid, Tamon Ueda, Dawei Zhang




Abstract


In this experimental and analytical work, interfacial shear strengths were evaluated at material and member level. Bi-surface shear strength was performed at material level and three-point bending test was conducted at member level. Beams were strengthened by adding steel reinforcement at soffit level and covered by spraying polymer cement mortar (PCM). After curing, strengthened RC beams were exposed to 60 ℃ for 24 hours and tested in three point loading test. Flexural capacity, load deflection relationship and failure modes were observed and compared with the strengthened beams tested at 20 ℃. Reduction in flexural capacity was observed with temperature, failure mode was also shifted from flexural mode to debonding mode of failure at elevated temperature. Ultimate shear load and failure modes were predicted by truss analogy approach. Debonding model was proposed by incorporating bi-surface interfacial shear strength, close agreement were observed between experimental and predicted values.


Keywords


Bi-Surface interfacial shear strength; debonding model; failure modes; strengthened beams; temperature

References


  1. Fowler, D.W., Polymers in Concrete: A Vision for the 21st Century, Cement and Concrete Composites, 21(5–6), 1999, pp. 449-452. [CrossRef]
  2. Santos, P.M.D. and Júlio, E.N.B.S., A State of the art Review on Roughness Quantification Methods for Concrete Surfaces, Construction and Building Materials, 38, 2013, pp. 912-923. [CrossRef]
  3. Espeche, A.D. and León, J., Estimation of Bond Strength Envelopes for Old to new Concrete Interfaces based on a Cylinder Splitting Test, Construction and Building Materials, 25(3), 2011, pp. 1222-1235. [CrossRef]
  4. Rashid, K., Ueda, T., Zhang, D., Miyaguchi, K., and Nakai, H., Experimental and Analytical Investigations on the Behavior of Interface between Concrete and Polymer Cement Mortar under Hygrothermal Conditions, Construction and Building Materials, 94, 2015, pp. 414-425. [CrossRef]
  5. Momayez, A., Ehsani, M.R., Ramezanianpour, A.A., and Rajaie, H., Comparison of Methods for Evaluating Bond Strength between Concrete Substrate and Repair Materials, Cement and Concrete Research, 35(4), 2005, pp. 748-757. [CrossRef]
  6. Smith, S.T. and Teng, J. FRP strengthened RC Beams I: Review of Debonding Strength Models, Engineering Structures, 24(4), 2002, pp. 385-395. [CrossRef]
  7. Smith, S.T. and Teng, J., FRP strengthened RC Beams II: Assessment of Debonding Strength Models, Engineering Structures, 24(4), 2002, pp. 397-417. [CrossRef]
  8. Zhang, D., Ueda, T., and Furuuchi, H., Intermediate Crack Debonding of Polymer Cement Mortar Overlay-Strengthened RC Beam, Journal of Materials in Civil Engineering, 23(6), 2011, 857-865. [CrossRef]
  9. Satoh, K. and Kodama, K., Central Peeling Failure Behavior of Polymer Cement Mortar Retrofitting of Reinforced Concrete Beams, Journal of Materials in Civil Engineering, 17(2), 2005, pp. 126-136. [CrossRef]
  10. Colotti, V. and Spadea, G., Shear Strength of RC Beams Strengthened with Bonded Steel or FRP Plates, Journal of Structural Engineering, 127(4), 2001, pp. 367-373. [CrossRef]
  11. Colotti, V., Spadea, G., and Swamy, R.N., Structural Model to Predict the Failure Behavior of Plated Reinforced Concrete Beams, Journal of Composites for Construction, 8(2), 2004, pp. 104-22. [CrossRef]
  12. Rashid, K., Ueda, T., and Zhang, D., Study on Strengthening of RC Beam by Overlaying with Polymer Cement Mortar at Elevated Temperature, Proceeding of Symposium on Reliability of Engineering System, Hangzhou, P.R. China, 2015. [CrossRef]
  13. Rashid, K., Ueda, T., Zhang, D., and Fujima, S., Study on Behavior of Polymer Cement Mortar in Severe Environmental Conditions, Proceedings of 37th Annual Convention of Japan Concrete Institute (JCI), Chiba, Japan, 2015, pp. 1338-1345. [CrossRef]
  14. Ohama, Y., Handbook of Polymermodified Concrete and Mortars Properties and Process Technology, New Jersy: Noyes Publications, 1995. [CrossRef]
  15. Bazant,Z.P. and Kaplan, M.F., Concrete at High Temperature Material Properties and Mathematical Methods, Harlow: Longman, 1996. [CrossRef]
  16. Zhang, D., Ueda, T., and Furuuchi, H., Concrete Cover Separation Failure of Overlay-strengthened Reinforced Concrete Beams, Construction and Building Materials, 26(1), 2012, pp. 735-745. [CrossRef]
  17. Tounsi, A. and Benyoucef, S., Interfacial Stresses in Externally FRPplated Concrete Beams, International Journal of Adhesion and Adhesives, 27(3), 2007, pp. 207-215. [CrossRef]
  18. Smith, S.T. and Teng, J., Interfacial Stresses in Plated Beams, Engineering Structures, 23(7), 2001, pp. 857-871. [CrossRef]


Full Text: PDF

Instructions for Preparing Papers for CED.docx
The Journal is published by The Institute of Research & Community Outreach - Petra Christian University.

©All right reserved 2016.Civil Engineering Dimension, ISSN: 1410-9530, e-ISSN: 1979-570X

 

View My Stats


Copyright © Research Center Web-Dev Team