Influence of Coatings on Bar-Concrete Bond
Publication: Journal of Materials in Civil Engineering
Volume 8, Issue 4
Abstract
This technical note presents results of an experimental program carried out to analyze the influence of protective coatings on the bar-concrete bond. The value of the bar-friction coefficient is obtained by testing a concrete tension strut reinforced with only one steel bar. The proposed experimental technique is described in detail, and typical results for smooth and ribbed bars are given. The experimental program compared manually applied epoxy and zinc coatings, and 72 tension strut tests were carried out. Statistical analysis shows a significant influence of the type of coating on the steel-concrete bond.
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References
1.
Associação Brasileira de Normas Técnicas. (1980). “Ensaio de compressão em corpos-de-prova cilindricos de concreto.”NBR 5739, Rio de Janeiro, Brazil.
2.
Associação Brasileira de Normas Técnicas. (1982a). “Determinação do coeficiente de conformação superficial de barras e fios de aço destinados a armaduras para concreto armado.”NBR 7477, Rio de Janeiro, Brazil.
3.
Associação Brasileira de Normas Técnicas. (1982b). “Barras e fios destinados a armadura para concreto armado.”NBR 7480, Rio de Janeiro, Brazil.
4.
Bajpai, A. C., Calus, I. M., and Fairley, J. A. (1985.) Statistical methods for engineers and scientists.” John Wiley and Sons, Chichester, England.
5.
Cairns, J., and Abdullah, R.(1994a). “Fundamental tests on the effect of an epoxy coating on bond strength.”ACI Mat. J., 91(4), 331–338.
6.
Cairns, J., and Abdullah, R.(1995). “Influence of rib geometry on strength of epoxy coated reinforcement.”ACI Struct. J., 92(1), 23–27.
7.
Castro, P. F., and Moura, W. A. (1991). “Aderência aço-concreto: um estudo da influência em inibidores de corrosão.”Proc., of REIBRAC (Brazilian Concrete Inst. Meeting), IBRACON, São Paulo, Brazil, 141–152.
8.
Choi, O. C., Hadje-Ghaffari, H., Darwin, D., and McCabe, S. L.(1991). “Bond of epoxy-coated reinforcement: bar parameters.”ACI Mat. J., 88(2), 207–217.
9.
Cleary, D. B., and Ramirez, J. A.(1993). “Epoxy-coated reinforcement under repeated loading.”ACI Struct. J., 90(4), 451–459.
10.
Cusens, A. R., and Yu, Z. (1993). “Bond strength and flexural behaviour of RC beams with epoxy-coated reinforcing bars.”Struct. Engr., April, London, England, 117–124.
11.
Goto, Y.(1971). “Cracks formed in concrete around deformed tension bars.”J. Am. Concrete Inst., Proc., 68(4), 241–251.
12.
Gustafson, D. P. (1988). “Epoxy update.”Civ. Engrg., ASCE, Oct., 38–41.
13.
Hamad, B. S., Jirsa, J. O., and D'Abreu de Paulo, N. I.(1993). “Anchorage strength of epoxy-coated hooked bars.”ACI Struct. J., 90(2), 210–217.
14.
Leon, R., Grundhoffer, T., and French, C. W. (1992). “Bond of coated and uncoated reinforcement in normal and high strength concrete.”Proc., Int. Conf. on Bond in Concrete, Riga, Latvia, Comite Euro-International du Beton, 5-71–5-80.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 8 • Issue 4 • November 1996
Pages: 212 - 214
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Nov 1, 1996
Published in print: Nov 1996
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