Effect of Silica Fume on Permeability and Microstructure of High Strength Concrete
Abstract
The important concrete structure in the vicinity of industry, thermal power plant suffers deterioration by the acid rain cause due to combination of CO2, SOx and NOx with rain water. A combined attack that is from acid as well as sulphate can be observed under impact of sulphuric acid. It attacks on Calcium hydroxide and form Calcium sulphate, which can be leached out easily and make Interfacial Transition Zone (ITZ) poor. The water retaining structure such as dam, weir should be impermeable and that can be achieved by binary cementitious blends, using Silica fume (SF). Silica fume a by product of silicon industry, proves very effective in improving the microstructure of concrete due to their finer particle size, approximately 100 times finer than cement particles. The SEM image of binary blended high strength concrete (HSC) with Silica fume shows the condensed packing of cement hydration product and a dense microstructure as compare to control mix. The water permeability test result reveals that there is about 87 percent reduction in the coefficient of permeability achieved by inclusion of 10% Silica fume (SF) by weight of cement. Rapid chloride penetration test (RCPT) has been performed to investigate the ingress of chloride ions into the concrete. There was significant reduction in chloride ions penetration recorded due to SF inclusion.
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References
Miloud, B. "Permeability and porosity characteristics of steel fiber reinforced concrete." (2005): 317-330.
Malhotra, V. M., and P. K. Mehta. "Advances in Concrete Technology, vol. 1." Pozzolanic and Cementitious Materials, 1st edn. Gordon and Breach Science Publishers, New York (1996).
Kirkbridge, T. W. "Condensed silica fume in concrete: FIP state of art report." London: FIP commission, UK: Thomas Telford House (1988).
Hou, Jiangyuan, and D.D.L. Chung. “Effect of Admixtures in Concrete on the Corrosion Resistance of Steel Reinforced Concrete.” Corrosion Science 42, no. 9 (September 2000): 1489–1507. doi:10.1016/s0010-938x(99)00134-1.
de Gutierrez, R. Mejia. "Effect of supplementary cementing materials on the concrete corrosion control." Revista de metalurgia 39 (2003): 250-255.
Khayat, K. H., M. Vachon, and M. C. Lanctot. "Use of blended silica fume cement in commercial concrete mixtures." ACI Materials Journal 94 (1997): 183-192.
Chia, Kok Seng, and Min-Hong Zhang. “Water Permeability and Chloride Penetrability of High-Strength Lightweight Aggregate Concrete.” Cement and Concrete Research 32, no. 4 (April 2002): 639–645. doi:10.1016/s0008-8846(01)00738-4.
Hearn, Nataliya, Rachel J. Detwiler, and Carmen Sframeli. “Water Permeability and Microstructure of Three Old Concretes.” Cement and Concrete Research 24, no. 4 (1994): 633–640. doi:10.1016/0008-8846(94)90187-2.
Halamickova, Pavla, Rachel J. Detwiler, Dale P. Bentz, and Edward J. Garboczi. “Water Permeability and Chloride Ion Diffusion in Portland Cement Mortars: Relationship to Sand Content and Critical Pore Diameter.” Cement and Concrete Research 25, no. 4 (May 1995): 790–802. doi:10.1016/0008-8846(95)00069-o.
Salvoldi, B.G., H. Beushausen, and M.G. Alexander. “Oxygen Permeability of Concrete and Its Relation to Carbonation.” Construction and Building Materials 85 (June 2015): 30–37. doi:10.1016/j.conbuildmat.2015.02.019.
Bentz, Dale P., Mark A. Ehlen, Chiara F. Ferraris, and Edward J. Garboczi. "Sorptivity-based service life predictions for concrete pavements." In Proceedings of the 7th International Conference on Concrete pavements, Florida, USA, vol. 1, (2001): 181-193.
Aitcin, P-C., S. L. Sarkar, and P. Laplante. "Long-term characteristics of a very high strength concrete." Concrete International 12, no. 1 (1990): 40-44.
Song, Ha-Won, Seung-Woo Pack, Sang-Hyeok Nam, Jong-Chul Jang, and Velu Saraswathy. "Estimation of the permeability of silica fume cement concrete." Construction and Building Materials 24, no. 3 (2010): 315-321. doi:10.1016/j.conbuildmat.2009.08.033.
Paillere, A_M, M. Buil, and J. J. Serrano. "Effect of fiber addition on the autogenous shrinkage of silica fume." Materials Journal 86, no. 2 (1989): 139-144.
Tech. Rep. IS: 8112 "Grade Ordinary Portland Cement-specification,” Bureau of Indian Standards New Delhi, India, (2005).
IS 15388, Specifications for Silica Fume, Bureau of Indian Standards (2003).
IS 383, “Specification for Coarse and fine aggregates from natural sources for concrete,” Bureau of Indian Standards, (2016).
IS 10262, Indian standards recommended Guidelines for concrete mix design, 2009th ed. Bureau of Indian Standards, (2009).
IS:3085-196, “Method of Test for Permeability of Cement Mortar and Concrete,” Bureau of Indian Standards, (1965).
D. Whitting, “Rapid Determination of the Chloride Permeability of Concrete,” in FHWA Report FHWA/RD-81/119, Federal Highway Administration, Washington D C, USA, (1981).
DOI: 10.28991/cej-2020-03091575
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