CHARACTERIZATION, DURABILITY, AND APPLICATION OF TREATED COIR GEOTEXTILES IN LOW VOLUME ROADS

ABSTRACT

A study was conducted to investigate the effects of chemical treatment in characterizing the tensile strength, durability, and application of untreated/treated coir geotextile in low-volume roads. Two woven and two nonwoven coir geotextiles were used in this study. Sodium hydroxide and potassium permanganate were the chemicals used to treat the coir geotextiles. The results show that the tensile strength of both the woven coir geotextiles treated with potassium permanganate was lower as compared to both the untreated woven coir geotextiles. The tensile strength of both the nonwoven coir geotextiles treated with sodium hydroxide was higher as compared to both the untreated nonwoven coir geotextiles. Further, the tensile strength of both the woven as well as nonwoven coir geotextiles treated with potassium permanganate was higher in comparison to the one treated with sodium hydroxide. The tensile strength of both the woven as well as nonwoven coir geotextiles first treated with sodium hydroxide followed by potassium permanganate was higher as compared to both the woven as well as nonwoven coir geotextiles treated with sodium hydroxide and potassium permanganate individually. The percentage reduction in tensile strength due to deterioration in the cross-machine direction for both the woven and nonwoven coir geotextiles was higher as compared to the direction of the machine. The results of monotonic load tests show that the models reinforced with untreated/treated woven and nonwoven coir geotextiles show an increase in the bearing pressure at greater deformation. Untreated woven/treated nonwoven coir geotextiles placed at the interface of the sand layer overlying silty sand can be useful in the low-volume roads.

摘要

研究了化学处理对未处理/处理的椰壳土工布在低交通量道路上的抗拉强度、耐久性和应用的影响. 本研究使用两种机织和两种无纺布椰壳土工布. 氢氧化钠和高锰酸钾是用于处理椰壳土工织物的化学品. 结果表明, 经高锰酸钾处理的两种椰壳机织物的抗拉强度均低于未经处理的椰壳机织. 经氢氧化钠处理的两种无纺椰壳土工布的拉伸强度均高于未经处理的椰壳土工布. 此外, 经高锰酸钾处理的椰壳机织物和无纺布的抗拉强度均比氢氧化钠处理的高. 经氢氧化钠和高锰酸钾处理的椰壳机织物和无纺布的抗拉强度均高于单独用氢氧化钠和高锰酸钾处理的机织物和无纺布. 与机器方向相比, 机织和非织造椰壳土工织物由于横向机器方向的劣化而导致的抗拉强度降低百分比更高. 单调荷载试验结果表明, 未经处理/处理的机织物和非织造coir土工织物加固的模型在较大变形时承载力增加. 未经处理的编织/处理的非织造椰纤维土工织物放置在覆盖粉砂的砂层的界面上, 可用于低交通量道路.

KEYWORDS:

• Woven coir geotextiles
• nonwoven coir geotextiles
• tensile strength
• chemical treatment
• durability
• low volume roads

关键词:

• 椰红色土工织物
• 无纺布椰壳土工布
• 抗拉强度
• 化学处理
• 耐久性
• 低交通量道路

Acknowledgments

We thank the National Institute of Technology, Hamirpur for providing us the platform, insight, and expertise that greatly helped this research.

Declaration

The authors state that there is no conflict of interest whatsoever. Wherever needed, necessary citations are added and plagiarism is avoided to the best of their abilities. No, external source of funding is applicable.