Compressive Strength and Surface Absorption of High Strength Silica Fume Concrete Under Different Curing Conditions

S.K. Al-Oraimi, A.W. Hago, H.F. Hassan, R. Taha

Abstract


The effect of curing conditions and silica fume replacement on the compressive strength and the initial surface absorption of high performance concrete is reported. The silica fume contents were 5, 10, 15 and 20%, by weight of cement. Four different curing conditions were used: air curing, control curing and two other curing conditions recommended by BS8110 and ACI308-81. The cementitious material (binder) content was constant (400 kg/m3); the water/cement (w/c) ratio was also maintained at a constant value of 0.35; while the water/binder (w/b) ratio ranged from 0.35 to 0.28. The addition of silica fume enhanced the compressive strength significantly up to 30%. The 28-day compressive strength was found to be 69.9 MPa without silica fume and it was determined to be 89.9 MPa with silica fume under the standard curing condition. The 28-day compressive strength results under the control curing condition were found to be higher than the compressive strength for specimens cured under other curing conditions. The surface absorption (ml/m2.s) was found to decrease as the percentage replacement of silica fume was increased. Control curing also decreases the surface absorption of water compared with air curing. Concrete with silica fume was less sensitive to drying than that without silica fume.

 


Keywords


Curing; High strength concrete; Compressive strength; Flexural strength; Splitting strength; Initial surface absorption; Silica fume

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References


BS 1881: Part 116: 1983, "Method for Determination of Compressive Strength of Concrete Cubes," British Standard Institution.

BS 1881: Part 117: 1983, "Method for Determination of Tensile Splitting Strength," British Standard Institution.

BS 1881: Part 118: 1983, "Method for Determination of Flexural Strength," British Standard Institution.

BS 1881: Part 208: 1996, "Recommendations for the Determination of the Initial Surface Absorption o Concrete," British Standard Institution.

Bentur, A., Goldman, A. and Cohen, M.D., 1998, "The Contribution of the Transition Zone to the Strength of High Quality Silica Fume Concrete," Proc Mater Res Soc. pp. 114: 97-102.

Cong, X., Gong, S., Darwin, D. and McCable, S., 1992, "Role of Silica Fume in Compressive Strength of Cement Paste, Mortar, and Concrete," ACI Mater J, Vol. 89(4), pp. 375-387.

Darwin, D., Shen, Z. and Harch, S., 1989, "Silica Fume, Bond Strength, and the Compressive Strength of Mortar," Proc Mater Res Soc. Vol. 114, pp. 105-110.

Detwiler, R.J. and Mehta, P.K., 1989, "Chemical and Physical Effects of Silica Fume on the Mechanical Behaviour of Concrete," ACI Mater J, Vol. 86(6), pp. 609-614.

Fidjestol, P., 1993, " Applied Silica Fume Concrete," Concrete International, Vol. 15(11), pp. 33-36.

Foster, S.W., 1994, "High Performance Concrete - Stretching the Paradigm," Concrete International, Vol. 16(10), pp. 33-34.

Goldman, A. and Bentur, A., 1993, "Influence of Microfillers on Enhancement of Concrete Strength," Cem Con Res, Vol. 23(4), pp. 962-972.

Hasni, L., Gallias, J.L. and Saloman, M., 1994, "Influence of the Curing Method on the Durability of Concrete," Third Intr Conf, Nice, France, SP-145, VM Malhotra, Ed., ACI, Farmington Hills, MI, pp. 131-155.

Khayat, K.H. and Aitcin, P.C., 1992, "Silica Fume in Concrete - An Overview," In: proceeding of the 4th International Conference on the Use of Fly Ash, Silica Fume, Slag and Natural Pozzolans in Concrete, Istanbul, Turkey, pp. 835-872. Luther, M.D., 1989, "Microsilica (Silica Fume) Concrete Durability in Severe Environment, Structural Materials," Proceeding of the Sessions at ASCE Structures Congress 1989, San Francisco, CA, USA, pp. 95-105.

Meeks, K.W. and Carino, N.J., 1999, "Curing of High- Performance Concrete: Report of the State-of-the Art," NISTIR 6295, Nat. Inst. Of Stds. And Tech., Gaithersburg, MD.

Mindess, S., 1994, "Materials Selection, Proportioning and Quality Control,” In: Shah SP, Ahmad SH, Editors. High Performance Concrete and Applications. London: Edward Arnold, pp. 1-26.

Nevile, A.M. and Brooks, J.J., 2001, "Concrete Technology," Prentice Hall, England, Revised Edition. OS7:2001 : Ordinary Portland Cement; Specification.

Ministry of Commerce & Industry, Directorate General for Specifications & Measurements. Oman. OS2:1982 : Natural aggregate; Specification. Ministry of Commerce & Industry, Directorate General for

Specifications & Measurements, Oman.

Toutanji, H. and El-Korchi, T., 1995, "The Influence of Silica Fume on the Compressive Strength of Cement Paste and Mortar," Cement and Concrete Research. Vol. 25(7), pp. 1591-1602.




DOI: http://dx.doi.org/10.24200/tjer.vol4iss1pp17-22

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