IJE TRANSACTIONS B: Applications Vol. 30, No. 11 (November 2017) 1518-1527    Article in Press

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( Received: June 22, 2017 – Accepted: September 08, 2017 )

Abstract    Cement substitution in self compacting concrete (SCC) is emphasized to conserve environment, reduce cost and utilize waste materials. This paper focuses on comparing the permeability and drying shrinkage of SCC containing Wollastonite micro fiber (WMF), a cheap pozzolanic fiber with respect to flyash. Microsilica was added for providing required viscosity to maintain homogeneity of the mixes. Trials to check flowability, passability and segregation resistance were conducted on binary, ternary and combined mixes of binder material. Results showed that drying shrinkage reduced by 49% for WMF reinforced concrete, whereas it increased by 1.25% for flyash’s ones as compared to normal concrete. Permeability coefficient decreased by 82% and 74%, respectively. Capillary voids influenced the permeability of hardened concrete but drying shrinkage was largely influenced by the rate of gain of tensile strength and expanding ettringite. Notably, flyash is not a reliable admixture for controlling drying shrinkage of high flow concretes.


Keywords    permeability, self compacting concrete, drying shrinkage, flyash, micro fiber


References    1.   Verbeck, G.J., “Hardened concrete-pore structure”, ASTM Sp. Tech. Publication, Vol.16, No. 9, (1955), 136-142. 2.   Sellevold, E.J., “Shrinkage of concrete: effect of binder composition and aggregate volume fraction from 0 to 60%”, Nordic concrete Research, The Nordic Concrete Federation, Oslo Publication,  Vol. 11, (1992), 139-152. 3.  Lomboy, G., Wang, K. and Ouyang, C. “Shrinkage and fracture properties of semiflowable self-consolidating concrete”, J. Mater. Civil Engineering, Vol. 23, No. 11, (2011), 1514-1524. 4.   Maghsoudi, A.A. and Dahooei, F.A., “Application of nanotechnology in selfcompacting concrete design”, IJE Transactions B: Applications, (2009), Vol. 22, No. 3, 229-244. 5.  Altoubat, S., Junaid, M. T., Leblouba, M. and Badran, D., “Effectiveness of fly ash on the restrained shrinkage cracking resistance of self-compacting concrete”, Cement and Concrete Composites, Vol. 79, (2017), 9-20. 6. Hashemi, S. H., and MirzaeiMoghadamb, I., “Influence of Nano-silica and Polypropylene Fibers on bond strength of reinforcement and structural lightweight concrete”, IJE TRANSACTIONS B: Applications, (2014), Vol. 27, No. 2, 261-268. 7. Soleimanzadeh, S. and Othuman Mydin, M. A., “Influence of High Temperatures on Flexural Strength of Foamed Concrete Containing Fly Ash and Polypropylene Fiber”, IJE TRANSACTIONS B: Applications, (2013), Vol. 26, No. 2, 117-126. 8.   Wittman, F.H., “On the action of capillary pressure”, Cement and Concrete Research, Vol. 6, No. 1, (1976), 49-56. 9.   Brooks, J.J. and Neville, A.M., “Estimating long term creep and shrinkage from short term tests”, Magazine of Concrete Research, Vol. 27, No. 90, (1975), 3-12. 10. Soliman, A.M. and Nehdi, M.L., “Effect of natural WMF microfibers on early-age behavior of UHPC”, Journal of Materials in Civil Engineering, Vol. 24, No. 7, (2012), 816–824.   11. Banthia, N., Sheng, J., “Fracture toughness of microfiber reinforced cement composites”, Cement and Concrete Composites, Elsevier, Vol. 18, No. 4, (1996), 251-269. 12. Swamy, R.N. and Stavrides, H., “Influence of fibre reinforcement on restrained shrinkage and cracking”, J. of American Concrete Inst., Vol. 76, No. 3, (1979), 443–460. 13. Idorn, G.M. and Thaulow, N., “Effectiveness of research on flyash in concrete”, Cement and Concrete Research, Vol. 15, No. 3, (1985), 535-44. 14. Odler, I. and Rossler, M., "Investigations on the relationship between porosity, structure and strength of hydrated portland cement pastes, (I) Effect of porosity”, Cement and Concrete Research, Vol. 15, No. 2, (1985), 320-330.  15. Odler, I. and Rossler, I., M., “Investigations on the relationship between porosity, structure and strength of hydrated portland cement pastes, (II) Effect of pore structure”, Cement and Concrete Research,  Vol. 15, No. 2, (1985), 320-330. 16. Bijen, J., “Flyash in concrete”, RILEM report of technical committee, 67-FAB, K. Wesche, Ed. section 3.2.5, 103, E & FN Spon, London, (1991). 17. Cohen, M.D., Goldman, A., Chen, W.F., “The role of Silica gel in mortar: transition zone versus bulk paste modification”, Cement and Concrete Research, Vol. 24, No. 1, (1994), 95-98. 18. Khayat, H. K. and Aitcin, P. C., “Microsilica in concrete- an overview, Flyash, Microsilica, Slag and Natural Pozzolans in Concrete”, Ed. V.M. Malhotra, ACI SP-132, Detroit, Michigan,  Vol. 2, (1992), 835-872. 19. Thomas, M.D.A., Shehata, M.H., Shashiprakash, S.G., Hopkins, D.S. and Cailb, K., “Use of ternary cementitious systems containing microsilica and Flyash in concrete”, Cement and Concrete Research, Vol. 29, (1999), 1207–1214.

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