Document Type : Research Paper
Authors
1
Professor, Department of Civil Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2
Department of Civil Engineering, Qeshm branch, Islamic Azad university, Qeshm, Iran
10.22124/jcr.2023.23227.1601
Abstract
Seven mixing plans with, 20%, 30%, 40%, 50%, 60% and 70% of slag in powdered form replaced part of the cement and the specimens were made at the ages of 28, 56, 91 and 120 days. They were subjected to the necessary tests. Slump tests, specific weight of fresh concrete, compressive strength, tensile strength of halving, electrical resistance, volumetric water absorption and depth of water penetration of the specimens made from reference concrete and cement-slag were performed. The results showed that the slag powder had no significant effect on mechanical properties of the specimens until the age of 56 days, but with the passage of time, the compressive strength of the specimen containing 40% slag at the age of 120 days was 1% compared to the reference specimen. In terms of tensile strength, specimens containing 30% slag at the age of 120 days showed an increase of 4% compared to the reference specimen; although the increase of 1% seems insignificant, but it indicates that until the age of 120 days, the slag has a positive effect on compressive strength, it is worth mentioning. The percentage of water absorption at the age of 120 days in the specimen containing 40% slag showed an increase of 3.4% compared to the reference specimen. In addition, the electrical resistance of the specimen containing 40% slag at the age of 120 days decreased by 37% and the water penetration depth in the specimen containing 40% slag increased by 2.8 mm compared to the reference specimen.
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