Evaluation of the properties of self-compacting concrete containing Ahvaz steel factory slag

Articles in Press

Document Type : Research Article

Authors

1 Department of Civil Engineering, Qeshm Branch, Islamic Azad University, Qeshm, Iran

2 Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

3 Department of Civil and Environmental Engineering, AUT (Tehran Polytechnic), Tehran, Iran

Abstract

Self-compacting concrete (SCC) is concrete that has three characteristics, the ability to flow under its own weight, to fill the necessary space in the mold completely, and to create a dense and sufficiently homogeneous mixture without the need for simultaneous compaction operations. The slag used belongs to Ahvaz steel factory. In some of its chemical components, this slag is significantly different from the common slags in the world, and for this reason, it has been used to investigate the construction of SCC. In making samples, 25%, 35%, 45%, 50% and 60% slag powder was substituted for a part of cement and the samples were tested at the ages of 28, 56, 91 and 120 days. Experiments related to concrete rheology including slump flow, V funnel and L box were performed. Compressive strength and mechanical static elasticity coefficient tests and tests related to durability including electrical resistance, water penetration depth and water volumetric absorption were performed. Based on the experiments, the optimal percentage of powder used was determined to be 25%. The slump test of the sample containing 25% of consumed slag showed an increase of 14% compared to the reference sample. In the compressive strength test, the samples containing 25% slag at the age of 120 days showed a 4% increase compared to the reference sample. The static elasticity coefficient of the samples containing the optimal percentage of slag increased by 4.8% compared to the reference sample at the age of 120 days.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 April 2025

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