Evaluation of the effect of metallurgical aggregates (Copper and steel slag) on mechanical properties of concrete in jointed plain concrete pavements (JPCP)

Document Type : Research Paper

Authors

1 Department of Roads and Transportation, Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran

2 Professor, Faculty of Civil and Environmental Engineering, Tarbiat Modarres University, Tehran, Iran

3 Assistant Professor, Faculty of Civil Engineering, Department of Roads and Transportation, Khomain Branch of Azad University

Abstract

This paper investigates and evaluates the use of slag as aggregate in concrete and its effect on concrete properties including mechanical strengths (compressive, flexural, abrasion, etc.) for its application in simple joint concrete pavements (JPCP). The main variable of changing the type of aggregate in the concrete mixture is natural aggregate (silica), copper slag and steel slag. The aforementioned slags have been replaced with natural aggregate in fine and coarse scales and percentages of 0%, 50% and 100%. The results showed that concrete samples made of copper slag aggregate (100CSA) had the highest resistance in compressive strength, indirect tensile strength, flexural strength and concrete workability (slump) compared to the other samples. The use of copper slag due to its high specific gravity also increased the specific gravity of concrete, which is considered a negative point. Concrete samples with silica aggregate (100NA) showed the best abrasion resistance after 600 abrasion cycles. Finally, considering the results of the tests and the importance of each test, it was found that concrete samples made of 50% copper slag aggregate and 50% silica aggregate (50NA+50CSA) increased the concrete performance among the 5 mix designs made in this study.

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History

  • Receive Date: 07 December 2024
  • Revise Date: 13 January 2025
  • Accept Date: 26 December 2024

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