Study of the durability of self compacting concrete with microsilica exposed to the Sodium Sulfate Attack

Nasser Chelouah, Mariam Meziani

Abstract


This article presents a detailed experimental study on the sulfate attack of mortars of self compacting concrete, and the effectiveness of employs microsilica and limestone fillers in the minimization of the damage resulting from such an attack. The test solution used to supply the sulfate ions and the cations was the sodium sulfate solution 4.5%. The solution saturated with lime was employed as the reference solution. The main variables investigated in the study were the type of cement and mineral addition. The expansion measured on prisms of mortar of (40x40x160) millimeters was employed to estimate their durability after exposure to the sodium sulfate solution attack during 91 days. Specimens of mortars were visually examined to assess the extent of deterioration due to the sulfate attack. The x-ray diffraction was used to evaluate the microstructural nature of the sulfate attack. The test results proved that the use of microsilica had a beneficial effect on the expansion due to the sodium sulfate attack. While mortars with limestone filler have undergoes degradation even with the use of cement resistant to sulfates.

Keywords


Ettringite; Thaumasite; Microsilica; Limestone filler Sodium sulfate attack; Mortars; Expansion.

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References


S.T. Lee, H.Y. Moon, R.N. Swamy. Cement and Concrete Composites, 27 (2005) 65p.

J. Zelié, I. Radovanovi, D. Jozié. .MTAEC9, 41(2) (2007) 91p.

H.A.F. Dehwah. Construction and Building Materials, 21 (2007) 29p.

T.H. Wee, A.K. Suryavanshi, S.F. Wong, K.M. Anisur Rahman. Cement and Concrete Composites, 27 (2000) 65p.

R.L. Day, M.A.Ward. MRS Symposia Proceedings, 113 (1988) 153p. In J., Skalny, J., Marchand, I., Odler. “Sulfate attack on concrete”. (Spon Press Edition. Taylor and Francis Group. London and New York), (2002) 217p.

J. Hill, E.A. Byars, J.H. Sharp, C.J. Lynsdale, J.C. Cripps, Q. Zhou. Cement and Concrete Composites 25 (2003) 997p.

I.E. Hatimi. Contribution à l’étude physico-chimique de la consolidation des poussières de four de cimenterie par des cendres volantes, (Mémoire de maitrise en sciences appliquées. Université Sherbrooke (Québec). Canada, 1999). 198p.

R. Lachaud., Annales de l'institut technique du bâtiment et des travaux publics, Paris, 3(70) (1979) 1p.

P.K. Mehta. Cement and Concrete Research, 3 (1973a) p1. In J. Skalny, J. Marchand, I. Odler. Sulfate attack on concrete”. Ed. (Spon Press, Taylor and Francis Group, London and New York, 2002) 217p.

P.K. Mehta. Journal of the American Ceramic Society, 56 (1973b) 315p. In J. Skalny, J. Marchand, I. Odler. Sulfate attack on concrete. (Edition Spon Press, Taylor and Francis Group, London and New York, 2002) 217p.

M. Eglinton. Resistance of Concrete to Destructive Agents. In P.C. Hawlett (ed.), (Lea’s Chemistry of Cement and Concrete, Arnold, London, 1998) 300. In J. Skalny J. Marchand, I. Odler. Sulfate attack on concrete. (Spon Press Edition, Taylor and Francis Group, London and New York, 2002) 217p.

L.S. Lota, P.L. Pratt, J. Bensted. A discussion of the paper:

Cement and Concrete Research, 25 (1995) 1811p.

J. Skalny, J. Marchand. I. Odler. Sulfate attack on concrete, (Spon Press Ed., Taylor and Francis Group, London and New York, 2002), 230p.


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ISSN 1801-1217 (Print)
ISSN 1805-9422 (Online)
Published by the Czech Technical University in Prague, Faculty of Mechanical Engineering