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Evaluation of the effect of industrial polypropylene fibers on the tensile strength of earthen materials
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Sawda Piri  , Javad Goudini *  , Mohammadreza Naiemirad |
| Department of Architecture, Faculty of Engineering, Razi University, Kermanshah, Iran. , j.goudini198@yahoo.com |
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Abstract: (193 Views) |
Objective: Objective: Mud has been one of the oldest materials used in rural Iranian architecture. However, it suffers from weaknesses such as low tensile strength, necessitating solutions to overcome these limitations. The present study aims to investigate the use of polypropylene synthetic fibers to enhance the tensile strength of this material.
Method: This study is based on a laboratory experimental approach. The tensile strength of mud-based materials was measured under the influence of polypropylene fibers of two lengths, 6 mm and 12 mm, with varying weight percentages, in order to determine the optimal fiber content. In the first stage, the fibers were added at weight percentages of 6%, 12%, 18%, 24%, and 30%, and in the second stage, at 1%, 2%, 4%, and 6%. Subsequently, the tensile strength of the brick samples was measured and analyzed. The fibers used in this experiment were procured from Negin Roz Company, Isfahan. They were white, filament-type fibers with a diameter of 17–19 microns.
Results: The results indicated that using 2% polypropylene fibers with a length of 6 mm could increase the tensile strength of the material by approximately 300% compared to the control sample (without fibers). Furthermore, it was observed that when the fiber content exceeded 12% by weight, the tensile strength of the reinforced samples decreased relative to the control. The findings also showed that fibers of 6 mm length had a greater effect on enhancing the tensile strength of the reinforced bricks.
Conclusions: Comparison of the results with the control samples clearly demonstrated that the use of polypropylene fibers can enhance the tensile strength of mud-based materials such as bricks. This approach allows for the creation of a new, improved composite while preserving the authenticity of traditional materials. A key achievement of this study is that polypropylene fibers, when used at appropriate lengths and percentages, can effectively improve the tensile strength of these materials.
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| Keywords: Rural architecture, clay materials, industrial fibers, polypropylene, tensile strength. |
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Full-Text [PDF 1086 kb]
(17 Downloads)
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Type of Study: Research |
Subject:
Special
Received: 2023/12/10 | Accepted: 2025/09/3 | Published: 2025/09/22
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