Structural performance of reinforced concrete beams repairing from spalling

Jumaat, M.Z. and Kabir, M.H. and Obaydullah, M. (2010) Structural performance of reinforced concrete beams repairing from spalling. European Journal of Scientific Research, 45 (1). pp. 89-102. ISSN 1450216X

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Abstract

The effectiveness of a repair work for the restoration of spalled reinforced concrete (r.c.) structures depends to a great extent, on their ability to restore the structural integrity of the r.c. element, to restore its serviceability and to protect the reinforcements from further deterioration. This paper presents results of a study concocted to investigate the structural performance of eight spalled r.c. beams repaired using two advanced repair materials in various zones for comparison purposes, namely a free flowing self compacting mortar (FFSCM) and a polymer Modified cementitious mortar (PMCM). The repair technique adopted was that for the repair of spalled concrete in which the bond between the concrete and steel was completely lost due to reinforcement corrosion or the effect of fire or impact. The beams used for the experiment were first cast, then hacked at various zones before they were repaired except for the control beam. The beam specimens were then loaded to failure under four point loadings. The structural response of each beam was evaluated in terms of first crack load, cracking behavior, crack pattern, deflection, variation of strains in the concrete and steel, collapse load and the modes of failure. The results of the test showed that, the repair materials applied on the various zones of the beams were able to restore more than 100 of the beams' capacity and that FFSCM gave a better overall performance.

Item Type: Article
Additional Information: Export Date: 6 January 2013 Source: Scopus Language of Original Document: English Correspondence Address: Jumaat, M.Z.B.; Dept. of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; email: zamin@um.edu.my References: Diagnosis of deterioration in concrete structures (2000) Concrete Repair Manual 2nd Edn, 1, pp. 988-1027. , Concrete Society and International Concrete Repair Institute. Published jointly by ACI International, Building Research Establishment; Tham, K.W., Durability of concrete structures (1992) Continuing Educational Workshop on Rehabilitation and Repair of Structures, IEB, Malaysia; Cambel - Allen, D., Roper, H., Concrete structures: Material, maintenance and repair (1991) Concrete Design and Construction Series, 102. , Longman Publishers (Pte) Ltd. Singapore. Structural Performance of Reinforced Concrete Beams Repairing from Spalling; Nounu, G., Chaudhary, Z.-U.-H., Reinforced concrete repairs in beams (1999) Construction and Building Materials, 13 (4), pp. 195-212. , DOI 10.1016/S0950-0618(99)00014-8; Choppola, L., Concrete durability and repair technology ENCO Engineering and Concrete Spresiano (TV); Guide to the maintenance, repair and monitoring of reinforced concrete structures (2003) Concrete Repair Manual, 1, pp. 691-736. , ACI International and BRE Concrete Society and ICRI, 2nd Edn; Rutenbeck, T., (1999) Repairing Concrete with Shotcrete, pp. 90-10. , Bureau of Reclamation, TSC, Civil Engineering Services, Metal Engineering and Research Laboratory, Denver, Colorado; Andrews, G., Sharma, A.K., Repaired reinforced beams (1998) Concrete International: Design and Construction; ACI, 10 (4), pp. 47-51; Almusallam, A.A., Al-Gahtani, A.S., Maslehuddin, M., Khan, M.M., Aziz, A.R., Evaluation of repair materials for functional improvement of slabs and beams with corroded reinforcement (1997) Proceedings of the Institution of Civil Engineers: Structures and Buildings, 122 (1), pp. 27-34; Almusallam, A.A., Al-Gahtani, A.S., Aziz, A.R., Rasheeduzzafar, Effect of reinforcement corrosion on bond strength (1996) Construction and Building Materials, 10 (2), pp. 123-129. , DOI 10.1016/0950-0618(95)00077-1; Emberson, N.K., Mays, G.C., Significance of property mismatch in the patch repair of structural concrete. Part 3: Reinforced concrete members in flexure (1996) Magazine of Concrete Research, 48 (1), pp. 45-57; Marrosszeky, M., Yu, J.G., Ng, C.M., Study of bond in concrete repairs (1991) Proceedings of the Second CANMET, ACI International Conference on Durability of Concrete, 126 (70), pp. 1331-1354. , Montreal, Canada, ACI-SP; Ong, B.G., (1993) Performance of Repaired Reinforced Concrete Slabs, , Master of Engineering Thesis, Department of Civil Engineering, National University of Singapore; Emberson, N.K., Mays, G.C., Significance of property mismatch in the patch repair of structural concrete. Part 3: Reinforced concrete members in flexure (1996) Magazine of Concrete Research, 48 (1), pp. 45-57; Guide for selecting and specifying for repair of concrete surfaces (1996) Concrete Repair Manual, 1, pp. 835-912. , International Concrete Repair Institute, 2nd edn., Published jointly by ACI International, Building Research Establishment, Concrete Society and International Concrete Repair Institute; Austin, S.A., Robins, P.J., Development of patch test to study behaviours of shallow concrete patch repairs (1993) Magazine of Concrete. Research, 45 (164), pp. 221-229; Cairns, J., Load relief during structural repairs to reinforced concrete beams (1993) Proceeding of the Institute of Civil Engineers, Structures and Building, 99, pp. 417-427; Marrosszeky, M., Yuan, Y., Major factors influencing the performance of structural repair (1991) Proceedings of ACI International Conference on Evaluation and Rehabilitation of Concrete Structures and Innovation in Design, 2, pp. 819-837. , Hong Kong, ACI-SP 128-50; (1985) Structural Use of Concrete, , British Standard Institution Part 1 and Part 2: London: BSI, BS 8110; (1999) Building Code Requirements for Structural Concrete, pp. 318-99. , American Concrete Institute MI 4833-9094, ACI; Broms, B.B., Lutz, L.A., Effects of arrangement of reinforcement on crack width and spacing of reinforced concrete members (1965) ACI Proceedings, ACI Journal, 62 (11), pp. 395-1409
Uncontrolled Keywords: Advanced repair materials, Bond, Reinforced concrete, Reinforcement corrosion, Repair, Spalling, Structural integrity.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 07 May 2013 01:56
Last Modified: 04 Oct 2017 07:34
URI: http://eprints.um.edu.my/id/eprint/6001

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