TLME-DEPENDENT BEHAVIOUR OF CONCRETE COLUMNS CONTAINING SILICA FUME

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MAZLOUM M.; RAMEZANIANPOUR A.A.

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Journal Paper

Paper Information

Journal: INTERNATIONAL JOURNAL OF CIVIL ENGINEERING Year:2004 | Volume:2 | Issue:1 Page(s): 23-31

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Information Journal Paper

Title

TLME-DEPENDENT BEHAVIOUR OF CONCRETE COLUMNS CONTAINING SILICA FUME

Author(s)

MAZLOUM M. | RAMEZANIANPOUR A.A.

Keywords

HIGH-STRENGTH CONCRETE

SILICA FUME

COMPRESSIVE STRENGTH

ELASTIC MODULUS

CREEP AND SHRINKAGE

Abstract

This paper presents the long-term deformations of reinforced high-strength concrete columns subjected to constant sustained axial forces. The objective of the study was to investigate the effects of binder systems containing different levels of silica fume on time-dependent behaviour of high-strength concrete columns. The experimental part of the work focused on concrete mixes having a fixed water/binder ratio of 0.35 and a constant total binder content of 500 kg/m3. The percentages of silica fume that replaced cement in this research were: 0%, 6%, 8%, 10% and 15%. The mechanical properties evaluated in the laboratory were: compressive strength; secant modulus of elasticity; strain due to creep and shrinkage. The theoretical part of the work is about stress redistribution between concrete and steel reinforcement as a result of time-dependent behaviour of concrete. The technique used for including creep in the analysis of reinforced concrete columns was age-adjusted effective modulus method. The results of this research indicate that as the proportion of silica fume increased, the short-term mechanical properties of concrete such as 28-day compressive strength and secant modulus improved. Also the percentages of silica fume replacement did not have a significant influence on total shrinkage; however, the autogenous shrinkage of concrete increased as the amount of silica fume increased. Moreover, the basic creep of concrete decreased at higher silica fume replacement levels. Drying creep (total creep - basic creep) was negligible in this investigation. The results of the theoretical part of this research
indicate that as the proportion of silica fume increased, the gradual transfer of load from the concrete to the reinforcement decreased and also the effect of steel bars in lowering the concrete deformation reduced. Moreover, the total strain of concrete columns decreased at higher silica
fume replacement levels.

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APA: Copy

MAZLOUM, M., & RAMEZANIANPOUR, A.A.. (2004). TLME-DEPENDENT BEHAVIOUR OF CONCRETE COLUMNS CONTAINING SILICA FUME. INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, 2(1), 23-31. SID. https://sid.ir/paper/271684/en

Vancouver: Copy

MAZLOUM M., RAMEZANIANPOUR A.A.. TLME-DEPENDENT BEHAVIOUR OF CONCRETE COLUMNS CONTAINING SILICA FUME. INTERNATIONAL JOURNAL OF CIVIL ENGINEERING[Internet]. 2004;2(1):23-31. Available from: https://sid.ir/paper/271684/en

IEEE: Copy

M. MAZLOUM, and A.A. RAMEZANIANPOUR, “TLME-DEPENDENT BEHAVIOUR OF CONCRETE COLUMNS CONTAINING SILICA FUME,” INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, vol. 2, no. 1, pp. 23–31, 2004, [Online]. Available: https://sid.ir/paper/271684/en

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