Abstract
The bond between fresh and hardened concrete can be subjected to various stress states depending on the application and service conditions. Four test methods, reflecting different stress states at the bond between the fresh and hardened concrete, are evaluated. The four methods are a slant shear test, an indirect tension test and two different flexure tests. The slant shear test is shown to be consistent and the most sensitive test in showing the strength of the bond, and was used to evaluate the effect of the following parameters on that strength:
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(1)
the water cement ratio of a portland cement mortar;
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(2)
the thickness of the bond layer;
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(3)
the effect of various curing conditions;
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(4)
the effect of wetting the surface of the hardened concrete before application of the portland cement mortar bonding agent; and
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(5)
the effect of delay between mixing a copolymer Polyvinyl acetate (PVA) bonding agent, and its application to hardened concrete.
We conclude that copolymer PVA is a poor bonding agent over a wide range of curing conditions and that the thickness of a portland cement mortar layer has a strong influence on bond strength. The other factors did not affect strength significantly.
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References
Dixon, J.F. and Sunley, V.K. (1977) Use of bond coats in concrete repair. Concrete (London), 17, 8, 34–35.
Francis, A.J., Horman, C.B. and Jerrems, L.E. (1971) The effect of joint thickness and other factors on the compressive strength of brickwork, Proc. 2nd Int. Conf. on Brick Masonry, B. Cer. Res. Ass., Stoke-on-Trent, England.
Kreigh, J.M (1976) Arizona slant shear test: a method to determine epoxy bond strength. J. ACI, 73, 7, 372, 373.
Moss, P.J. and Batchelar, M.L. (1975) Structural bonding using epoxy resin adhesives. New Zealand Engineering, 30, 2, 45–52.
Neville, A.M. (1981) Properties of Concrete 3rd. Ed. Pitman Publishing, Inc., Marshfield, MA.
Shaw, J.D.N. (1983) The use of polymers in concrete repair, Civil Engineering (London), June, July 1983.
Sise, A. (1984) Flexural bond strength of masonry, M.Sc. Thesis, University of Calgary.
Tabor, L.D. (1979) Concrete repair. Precast Concrete, 10, 2, 65–68.
Walpole, R.E. and Myers, R.J. (1978) Probability and Statistics for Engineers and Scientists 2nd Ed. Macmillan Publishing Co., New York, N.Y.
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© 1986 Springer Science+Business Media Dordrecht
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Wall, J.S., Shrive, N.G., Gamble, B.R. (1986). Testing of Bond Between Fresh and Hardened Concrete. In: Sasse, H.R. (eds) Adhesion between polymers and concrete / Adhésion entre polymères et béton. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-3454-3_36
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DOI: https://doi.org/10.1007/978-1-4899-3454-3_36
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-412-29050-3
Online ISBN: 978-1-4899-3454-3
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