Engineering and Technology Journal

Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method

Document Type : Research Paper

Authors

1 Civil Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.

2 Building and construction Department, Al-Esraa University college, Baghdad, Iraq

Abstract

Roller Compacted Concrete Pavement (RCCP) is one type of concrete poured and compacted with the same machines utilized to construct heavy-duty pavements, log sorting, and parking. In this work, a combination of three factors was optimized to produce a sustainable RCCP. These factors were densified silica fume, ground granulated blast-furnace Slag, and mixing water contents. By weight, sulfate-resistant Portland cement was substituted with cementitious materials  such as silica fume and slag in the amounts of (5, 7.5, and 10%) and (25, 27.5, and 30%), respectively. In addition, various percentages (5, 6, and 7%) of water content were utilized. Using the Taguchi approach, the impact of these factors was investigated based on the results of compressive strength and bulk density. The cubic specimens of compressive strength and bulk density, with 100 mm length, were tested at 7, 14, and 28 days. According to the results, the optimum percentages of silica fume, slag, and water contents were (5, 27.5, and 6%), respectively. Comparing the optimal mixture to the reference, the compressive strength enhancement was about 13.9%. According to Taguchi's study, water content has a most significant influence on the characteristics of RCCP than silica fume content. The slag content has the least impact on RCCP.

Graphical Abstract

Highlights

  • Utilizing mineral admixtures wastes (silica fume and slag) improves the functionality of RCC.
  • Water content is the most influencing factor on the properties of RCCP compared with silica fume content.
  • the compressive strength enhancement was about 13.9%.

Keywords

Main Subjects

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Engineering and Technology Journal
Volume 41, Issue 5
Civil Engineering
12 articles
May 2023
Page 724-733
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