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<p>This paper explores the valorization of natural resources by integrating sisal cords to improve the mechanical and interfacial properties of cement and gypsum composites. Focusing on the abundance of local resources in Tunisia, this study proposes an economic and ecological approach to the design of composite materials and a proposing a solution for the fiber/matrix slippage phenomena. The methodology involves the formulation of a new composite, followed by mechanical tensile and flexural tests and the study of physical properties such as density and absorption rate. In addition, mathematical modeling based on ROM, IROM and Hirsh approaches is used to improve the understanding of the mechanical behavior of these composites. The results show a significant 23% improvement in flexural strength with an optimum fraction of 0.75% sisal rope compared to pure cement. At the same time, an in-depth study of water absorption over seven days revealed a correlation between the amount of fiber and the hydric behavior of the composite. A separate phase of the study focuses on the application of sisal cords in gypsum composites, showing a remarkable 27.7% improvement in flexural strength with an optimum volume fraction of 0.75%. The results suggest a strong potential for the application of these reinforced materials in various industrial sectors, offering sustainable and efficient solutions.</p>

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Experimental Investigation of the Effect of Sisal Cords on the Mechanical Properties of Gypsum and Cement Composites

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • Samir Zidi,
  • Jalil Echi,
  • Imed Miraoui

摘要

This paper explores the valorization of natural resources by integrating sisal cords to improve the mechanical and interfacial properties of cement and gypsum composites. Focusing on the abundance of local resources in Tunisia, this study proposes an economic and ecological approach to the design of composite materials and a proposing a solution for the fiber/matrix slippage phenomena. The methodology involves the formulation of a new composite, followed by mechanical tensile and flexural tests and the study of physical properties such as density and absorption rate. In addition, mathematical modeling based on ROM, IROM and Hirsh approaches is used to improve the understanding of the mechanical behavior of these composites. The results show a significant 23% improvement in flexural strength with an optimum fraction of 0.75% sisal rope compared to pure cement. At the same time, an in-depth study of water absorption over seven days revealed a correlation between the amount of fiber and the hydric behavior of the composite. A separate phase of the study focuses on the application of sisal cords in gypsum composites, showing a remarkable 27.7% improvement in flexural strength with an optimum volume fraction of 0.75%. The results suggest a strong potential for the application of these reinforced materials in various industrial sectors, offering sustainable and efficient solutions.