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Fracture Behaviour of Fibre Reinforced Geopolymer Concrete


Affiliations
1 CSIR-Structural Engineering Research Centre, Taramani, Chennai 600 113, India
2 Anna University, Adyar, Chennai 600 025, India
 

Geopolymers have several applications and concrete is one of the materials that can be produced with geopolymer as binder. Since industrial byproducts/wastes such as fly ash, iron slag, micronized biomass silica, silica fume, red mud, etc. can be used as a binder instead of Portland cement, geopolymer concrete (GPC) has generated lot of interest among the scientific and engineering community. This has also resulted in reduced carbon footprint of concrete and an effective method of disposing industrial waste. In this study GPC with a blend of class-f fly ash and ground granulated blast furnace slag as binder has been developed, and its flexural and fracture characteristics have been studied. The GPC developed has a 28-day compressive strength in the range 40-50 MPa. Incorporation of steel fibres resulted in increased flexural strength, enhanced fracture properties and ductility. The residual strength of steel fibre reinforced GPC was also determined in the study.

Keywords

Alkali Activators, Fracture Behaviour, Fly Ash, Geopolymer Concrete, Iron Slag, Steel Fibres.
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  • Li, C., Sun, H. and Li, L., A review: the comparison between alkaliactivated slag (Si + Ca) and metakaolin (Si + Al) cements. Cem. Concr. Res., 2010, 40(9), 1341–1349.

  • Davidovits, J., Geopolymer Chemistry and Applications, Institute Geopolymere, Saint-Quentin, France, 2008.

  • Adam, A. A., Strength and durability properties of alkali activated slag and fly ash-based geopolymer concrete Ph D thesis, School of Civil, Environmental and Chemical Engineering, RMIT University, Melbourne, Australia, August 2009.

  • Davidovits, J., Chemistry of geopolymeric systems, terminology. In Proceedings of the 2nd International Conference Geopolymere 99, Saint-Quentin, France, 1999, pp. 9–39.

  • Xu, H. and Van Deventer, J. S. J., The geopolymerisation of aluminosilicate minerals. Int. J. Miner. Proc., 2000, 59(3), 247–266.

  • Dattatreya, J. K., Bharatkumar, B. H. and Rajamane, N. P., Geopolymer cement concretes – a viable and green alternative to Portland cement based structural concrete. In Proceedings of the 3rd Asian Conference on Ecstasy in Concrete, Chennai, 5–6 December 2010, pp. 243–255.

  • Puligilla, S. and Mondal, P., Role of slag in microstructural development and hardening of fly ash-slag geopolymer. Cem. Concr. Res., 2013, 43, 70–80.

  • Nath, P. and Sarker, P. K., Effect of GGBFS on setting, workability and early strength properties of fly ash geopolymer concrete cured in ambient condition. Constr. Build. Mater., 2014, 66, 163–171.

  • Yip, Ch. K., Lukey, G. C. and Van Deventer, J. S. J., The coexistence of geopolymeric gel and calcium silicate hydrate at the early stage of alkaline activation. Cem. Concr. Res., 2005, 35(9), 1688–1697.

  • Bazant, Z. P. and Oh, B. H., Crack band theory for fracture of concrete. Mater. Struct., 1983, 16(3), 155–177.

  • Tabbara, M. R., Kazeni, M. T. and Pijaudier-Cabot, G., Random particle model for fracture of aggregate or fiber composites. J. Eng. Mech., 1990, 116(8), 1686–1705.

  • Banthia, N. and Sheng, J., Fracture toughness of micro-fiber reinforced cement composites. Cem. Concr. Compos., 1996, 18(4), 251–269.

  • Du, J. et al., Fracture process zone for concrete for dynamic loading. ACI Mater. J., 1992, 89(3), 252–258.

  • Bharatkumar, B. H. et al., Effect of fly ash and slag on the fracture characteristics of high performance concrete. Mater. Struct., 2005, 38(1), 63–72.

  • Raghu Prasad, B. K. et al., Fracture mechanics model for analysis of plain and reinforced high performance concrete beams. J. Eng. Mech., 2005, 131(8), 831–838.

  • Bencardino, F. et al., Experimental evaluation of fiber reinforced concrete fracture properties. Composites Part B: Eng., 2010, 41(1), 17–24.

  • Pan, Z., Sanjayan, J. G. and Vijay Rangan, B., Fracture properties of geopolymer paste and concrete. Mag. Concr. Res., 2011, 63(10), 763–771.

  • Sarker, P. K., Haque, R. and Ramgolam, K. V., Fracture behaviour of heat cured fly ash based geopolymer concrete. Mater. Des., 2013, 44, 580–586.

  • Ganesan, N., Indira, P. V. and Santhakumar, A., Influence of steel fibres on tension stiffening and cracking of reinforced geopolymer concrete. Mag. Conc. Res., 2014, 66(6), 268–276.

  • Rao, G., et al., Fracture parameters of geopolymer concrete. Appl. Mech. Mater., 2015, 764, 1090–1094.

  • MC90, Design of concrete structures. CEB-FIP Model Code 1990, 1993.

  • Bazant, Z. P. and Becq-Giraudon, E., Statistical prediction of fracture parameters of concrete and implications for choice of testing standard. Cem. Concrete Res., 2002, 32, 529–556.

  • RILEM TC 50 – FMC, Determination of the fracture energy of mortar and concrete by means of three-point bend tests on notched beams. Mater. Struct., 1985, 18, 285–290.


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  • Fracture Behaviour of Fibre Reinforced Geopolymer Concrete

Abstract Views: 460  |  PDF Views: 132

Authors

S. Sundar Kumar
CSIR-Structural Engineering Research Centre, Taramani, Chennai 600 113, India
K. C. Pazhani
Anna University, Adyar, Chennai 600 025, India
K. Ravisankar
CSIR-Structural Engineering Research Centre, Taramani, Chennai 600 113, India

Abstract


Geopolymers have several applications and concrete is one of the materials that can be produced with geopolymer as binder. Since industrial byproducts/wastes such as fly ash, iron slag, micronized biomass silica, silica fume, red mud, etc. can be used as a binder instead of Portland cement, geopolymer concrete (GPC) has generated lot of interest among the scientific and engineering community. This has also resulted in reduced carbon footprint of concrete and an effective method of disposing industrial waste. In this study GPC with a blend of class-f fly ash and ground granulated blast furnace slag as binder has been developed, and its flexural and fracture characteristics have been studied. The GPC developed has a 28-day compressive strength in the range 40-50 MPa. Incorporation of steel fibres resulted in increased flexural strength, enhanced fracture properties and ductility. The residual strength of steel fibre reinforced GPC was also determined in the study.

Keywords


Alkali Activators, Fracture Behaviour, Fly Ash, Geopolymer Concrete, Iron Slag, Steel Fibres.

References





DOI: https://doi.org/10.18520/cs%2Fv113%2Fi01%2F116-122