Mechanical Properties of Ultra High Performance Concrete
Abstract:A research program is conducted to evaluate the mechanical properties of Ultra High Performance Concrete, target compressive strength at the age of 28 days being more than 150 MPa. The methodology to develop such mix has been explained. The material properties, mix design and curing regime are determined. The material attributes are understood by studying the stress strain behaviour of UHPC cylinders under uniaxial compressive loading. The load –crack mouth opening displacement (cmod) of UHPC beams, flexural strength and fracture energy was evaluated using third point loading test. Compressive strength and Split tensile strength results are determined to find out the compressive and tensile behaviour. Residual strength parameters are presented vividly explaining the flexural performance, toughness of concrete.Durability studies were also done to compare the effect of fibre to that of a control mix For all the studies the Mechanical properties were evaluated by varying the percentage and aspect ratio of steel fibres The results reflected that higher aspect ratio and fibre volume produced drastic changes in the cube strength, cylinder strength, post peak response, load-cmod, fracture energy flexural strength, split tensile strength, residual strength and durability. In regards to null application of UHPC in India, an initiative is undertaken to comprehend the mechanical behaviour of UHPC, which will be vital for longer run in commercialization for structural applications.
Keywords: Ultra High Performance Concrete, Reinforcement Index, Compressive Strength, Tensile Strength, Flexural Strength, Residual Strength, Fracture Energy, Stress-Strain Relationships, Load-Crack Mouth Opening Displacement and Durability.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1327941Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 10303
 Association Fran├ºaise de Génie Civil (2002), "Interim Recommendations for Ultra High Performance Fibre-Reinforced Concretes".
 S. Collepardi, L. Coppola, R. Troli and M. Collepardi, (1996) "Mechanical Properties of Modified Reactive Powder Concrete. International Conference on Superplasticizers and the Chemical Admixtures in Concrete", Rome, Italy, Farmingto Hills, ACI Publication sp- 173. pp. 1-21.
 Feylessoufi.A, Crespin.M,Dion.P,Bergaya.F, VanDamme.H. and Richard.P, "Controlled Rate Thermal Treatment of Reactive Powder Concretes", Advanced Cement Based Materials, Volume 6, Issue 1, pp. 21-27.
 Redaa, M.M., Shrivea, G.N. and Gillotta, E.J (1999) "Microstructural investigation of innovative UHPC", Cement and Concrete Research, Volume 29, Issue 3, pp. 323-329.
 X. Qian and Z. Li. 2001. "The Relationships between Stress and Strain for High-Performance Concrete with Metakaolin--. Cement and Concrete Research Journal, Vol 31, pp1607-1611.
 Jianxin Ma; JörgDietz, "Ultra High Performance Self Compacting Concrete--,LacerNo. 7, 2002.
 O. Bayard and Ple, O. (2003), "Fracture mechanics of reactive powder concrete: material modelling and experimental investigations", Engineering Fracture Mechanics, Vol.70, pp. 839-851
 E. Fehling; K. Bunje; T. Leutbecher 2004 "Design relevant properties of hardened Ultra High Performance Concrete". "Proceeding of the International Symposium on ultra high performance Concrete Kassel, Germany", Sep. 13-15, 2004. Pp.377-390.
 Katrin HabelEmmanuel Denari'e Eugen Br┬¿uhwiler,2006 "Time dependent behaviour of elements combining ultra-high performance fiber reinforced concretes (UHPFRC) and reinforced concrete", Materials and Structures, Vol 39, pp:557-569
 D. Redaelli and A. Muttoni, 2007"Tensile Behaviour of Reinforced Ultra-High Performance Fiber Reinforced Concrete Elements". Symposium Dubrovnik,Concrete Structures - Stimulators of Development. pp. 267-274.
 Benjamin Graybeal and Marshall Davis (2008) "Cylinder or Cube: Strength Testing of 80 to 200 MPa (11.6 to 29 ksi) Ultra-High- Performance Fiber-Reinforced Concrete--, Title no. 105- M68,ACIMaterial Journal,2008
 Victor Y. Garas, Lawrence F. Kahn, Kimberly E. Kurtis (2009) "Shortterm tensile creep and shrinkage of ultra-high performance concrete--. Cement& Concrete Composites, Vol 31, pp. 147-152
 S. Shihada and M. Arafa 2010 "Effects of Silica Fume, Ultrafine and Mixing Sequences on Properties of Ultra High Performance-- Concrete Asian Journal of Materials Science 2 (3): 137-146.
 I. H. Yang, C. Joh, and B. S. Kim., (2011) "Flexural strength of ultra high strength concrete beams reinforced with steel fibers--, The Twelfth East Asia-Pacific Conference on Structural Engineering and Construction. Procedia Engineering 14 (2011), 793-796.
 Seung Hun Park, DongJoo Kim, Gum Sung Ryu, KyungTaekKoh (2012). "Tensile behaviour of Ultra High Performance Hybrid Fiber Reinforced Concrete --Cement and ConcreteComposites 34(2012):pp. - 172-184
 R. Deeb, A. Ghanbari, B.L. Karihaloo (2012) "Development of selfcompacting high and ultra high performance concretes with and without steel fibres--. Cement and Concrete Composites, Volume 34, Issue 2, February 2012, Pages 185-190.
 Pierre Richard, Marcel Cheyrezy 1995, scientific division Bouygues, 78061 StQuentin En Yvelines, France, Composition Of Reactive Powder Concretes, Cement and concrete research, vol.25.no.7, pp. 1501 - 1511, 1995
 ASTM C 1609M-10, "Standard test method for flexural performance of fiber reinforced concrete".Richard, P. and Cheyrezy, M. H., (1994), "Reactive powder concretes with high ductility and 200-800 MPa compressive strength", ACI SP144, 24, 507-18.
 Richard, P. and Cheyrezy, M. H., (1995), "Composition of reactive powder concretes", Cement & Concrete Research, 25(7), 1501-1511.
 RILEM (1985). "Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams". Materials and Structures, 18, 99-101. Prepared by TC50-FMC.
 RILEM TC 148-SSC, (2000) "Recommendations of TC 148-SSC: Strain Softening of Concrete - Test methods for compressive softening Test method for measurement of the strain-softening behaviour of concrete under uniaxial compression", Materials and Structures, Vol. 33, pp. 347- 351.