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<p>This study investigates the effect of saline (sodium chloride, NaCl) and alkaline (Sodium Hydroxide, NaOH) exposure on the mechanical and interfacial performance of coconut coir rope for potential application in Textile Reinforced Mortar (TRM). Coconut coir rope specimens were immersed in 8% NaCl and NaOH solutions for 30 days to simulate aggressive environmental conditions. Tensile and pull-out tests were conducted to evaluate mechanical properties and bonding behavior. The results show that untreated coir rope exhibits an average tensile strength of 5.33 (Mega Pascal, MPa) and a pull out strength of 1.54&#xa0;MPa, while NaCL treated specimens demonstrate comparable performance, with tensile and pull out strengths of 5.16&#xa0;MPa and 1.51&#xa0;MPa, respectively. In contrast, NaOH treatment significantly reduces the tensile strength to 3.37&#xa0;MPa and the pull out strength to 0.71&#xa0;MPa, corresponding to reductions of approximately 37% and 54%. Statistical analysis confirms that NaCl exposure does not significantly affect performance, whereas NaOH exposure leads to significant degradation. These findings indicate that coconut coir rope is suitable for use in chloride-rich environments but requires further protection under highly alkaline conditions. This study provides new insights into the durability and interfacial behavior of coconut coir rope as natural fiber based reinforcements for sustainable mortar applications.</p>

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Pull-out performance of coconut coir rope under chemical exposure for textile reinforced mortar (TRM)

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月15日

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  • Hendra Hendra,
  • Syarif Iskandar,
  • Syahla Andini Putri,
  • Gadi Dzikri Maulana,
  • Rendi Renaldi

摘要

This study investigates the effect of saline (sodium chloride, NaCl) and alkaline (Sodium Hydroxide, NaOH) exposure on the mechanical and interfacial performance of coconut coir rope for potential application in Textile Reinforced Mortar (TRM). Coconut coir rope specimens were immersed in 8% NaCl and NaOH solutions for 30 days to simulate aggressive environmental conditions. Tensile and pull-out tests were conducted to evaluate mechanical properties and bonding behavior. The results show that untreated coir rope exhibits an average tensile strength of 5.33 (Mega Pascal, MPa) and a pull out strength of 1.54 MPa, while NaCL treated specimens demonstrate comparable performance, with tensile and pull out strengths of 5.16 MPa and 1.51 MPa, respectively. In contrast, NaOH treatment significantly reduces the tensile strength to 3.37 MPa and the pull out strength to 0.71 MPa, corresponding to reductions of approximately 37% and 54%. Statistical analysis confirms that NaCl exposure does not significantly affect performance, whereas NaOH exposure leads to significant degradation. These findings indicate that coconut coir rope is suitable for use in chloride-rich environments but requires further protection under highly alkaline conditions. This study provides new insights into the durability and interfacial behavior of coconut coir rope as natural fiber based reinforcements for sustainable mortar applications.