Assessment of the casting position factor in reinforced concrete elements in view of experimental studies

• Autorzy: Dybeł P. , Furtak K.

Identyfikatory

DOI

10.2478/ace-2014-0014

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of experimental investigations performed by the authors on the casting position factor. It was proved that at the height of reinforced concrete elements there are different bond conditions. Moreover, the bond depends on concrete mechanical properties, element height as well as concrete mix composition and consistency. The experiments also showed the advisability of determining the casting position factor separately for bars from normal concrete and those from high–performance concrete (HPC). The analysis of investigation results has shown that “good” bond conditions are a relative concept and depend on, among other things, element height. The higher the element the better the concrete to lower bars bond. Consequently, elements of considerable height (higher than 600 mm) demonstrate a bigger difference between concrete to upper bars bond and concrete to lower bars bond.

Słowa kluczowe

EN

concreting; bond of reinforcement; casting position; anchorage length; high performance concrete

PL

układanie betonu; przyczepność zbrojenia; miejsce zabetonowania; długość zakotwienia; beton wysokowartościowy

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2014
• Tom: Vol. 60, nr 2
• Strony: 209--221
• Opis fizyczny: Bibliogr. 20 poz., tab., il.

Twórcy

autor

Dybeł P.

• Department of Geomechanics, Civil Engineering and Geotechnics, AGH University of Science and Technology, Poland

autor

Furtak K.

• Department of Building Bridges and Tunnels, Cracow University of Technology, Poland

Bibliografia

• 1. ACI Committee 318, Build ing Code Requirements for Reinforced Concrete (ACI 318−51), American Concrete Institute, 1951.
• 2. ACI Committee 318, Building Code Requirements for Reinforced Concrete (ACI 318-71), American Concrete Institute, 1971.
• 3. ACI Committee 318, Building Code Requirements for Reinforced Concrete (ACI 318-77), American Concrete Institute, 1977.
• 4. ACI Committee 318, Building Code Requirements for Reinforced Concrete (ACI 318-89), American Concrete Institute, 1989.
• 5. ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-08), American Concrete Institute, 2008.
• 6. ACI Committee 408, Suggested Development, Splice and Standard Hook Provisions for Deformed Bars in Tension, Concrete International 1, 7, 1979.
• 7. B. Brettmann, D. Darwin, R. Donahey, Effect of Superplasticizers on Concrete-Steel Bond Strength, SL Report No. 84-1, University of Kansas Center for Research, 1984.
• 8. B. Brettmann, D. Darwin, R. Donahey, Bond of Reinforcement to Superplasticized Concrete, ACI Journal, 83, 1, 98-107, 1986.
• 9. A. CASTEL, T. VIDAL, K. VIRIYAMETANONT, R. FRANCOIS, Effect of Reinforcing Bar Orientation and Location on Bond with Self-Consolidating Concrete, ACI Structural Journal, 103, 4, 559−567, 2006.
• 10. A. P. CLARK, Comparative Bond Efficiency of Deformed Concrete Reinforcing Bars, Journal of Research, 5, 37, 399-407, 1947.
• 11. P. DYBEŁ, The influence of the composition and properties of high-performance concrete on the bond strength of reinforcement bars, Doctoral Thesis, Cracow University of Technology, 2013.
• 12. Eurocode 2, Design of concrete structures-Part 1-1: General Rules, and Rules for Buildings, UNI-ENV 1992-1-1, European Committee for Standardization, 2008.
• 13. B. S. HAMAD, R. A. AKIK, Role of castin g position on bond strength of reinforcement in eccentric pullout silica fume concrete specimens, Materials and Structures, 34, 3, 163-171, 2001.
• 14. FIB, Bulletin No. 65, Model Code 2010 − Final draft, Volume 1, 2012.
• 15. K. HOLSCHEMACHER, F. DEHN, D. WEISSE , Influence of the Rebar Position on the Bond Behaviour in Hight-Strenght Concrete, Leipzing annual civil engineering report 7, 135-144, 2002.
• 16. P. R. JAUNTY, D. MITCHELL, M. S. MIRZA, Investigation of Top Bar Effects in Beams, ACI Material Journal, 85, 3, 251-257, 1988.
• 17. J. O. JIRSA, J. E. BREEN, Influence of Casting Position and Shear on Development and Splice Length – Design Recommendation, Research Report No. 242-3F, Center for Transportation Research, The University of Texas at Austin, 1981.
• 18. J. J. LUKE, B. S. HAMAD, J. O. JIRSA, J. E. BREEN, The Influence of Casting Position on Development and Splice Length of Reinforcing Bars, Research Report No. 242-1, Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin, 1981.
• 19. J. J. PĘDZIWIATR, L. J. JANKOWSKI, Some results of experimental researches on bond in reinforced concrete members, Archives of Civil Engineering, 53, 1, 37-55, 2007.
• 20. R ILEM/CEB/FIP, Technical recommendations for the testing and use of construction materials, E&FN Spon, U.K., 1983.