Effect of Chemical Treatment on the Tensile Strength Behavior of Coir Geotextiles

ABSTRACT

The present study investigates the effects of chemical treatment on the tensile strength behavior of the two woven and two nonwoven coir geotextiles. The results reveal that tensile elongation at failure for the untreated and treated woven and nonwoven coir geotextiles was higher in the warp direction in comparison to the weft direction. The tensile elongation at failure for the untreated and treated woven coir geotextiles were influenced by the stiffness and the opening of kinks in the coir yarn whereas the tensile elongation at failure of the untreated/treated nonwoven coir geotextiles was influenced by the presence of the polyethylene (PE) yarn used in stitching along with PE netting and diameter of the yarn used in PE netting. The chemical treatment decreased and increased the tensile strength of both the woven and nonwoven coir geotextiles, respectively. The mass per unit area of woven coir geotextile decreased whereas it increased for both the nonwoven coir geotextiles after the chemical treatment. The chemical treatment modifies the surface characteristics of both the untreated woven and nonwoven coir geotextiles due the removal of impurities and filling up the voids present on the surface.

摘要

本研究探讨了化学处理对两种机织物和两种非织造布的拉伸强度性能的影响。结果表明，未经处理和处理的机织物和非织造椰壳纤维织物的断裂伸长率在纬纱方向上比纬纱方向高。未经处理和处理的机织椰壳土织物的断裂伸长率受椰壳纱中刚度和开度的影响，而未处理/处理的非织造布土工织物的断裂伸长率受PE存在的影响。用于PE织网的纱线与PE网的缝合线和直径。化学处理降低了织物和非织造织物的拉伸强度，提高了织物的抗拉强度。织物织物的单位面积质量下降，而在化学处理后的非织造棕土织物的单位面积质量增加。化学处理改变未经处理的机织物和非织造椰壳纤维织物的表面特性，因为去除杂质并填充表面上存在的空隙。

KEYWORDS:

• Woven coir geotextiles
• Nonwoven coir geotextiles
• tensile strength
• chemical treatment
• mass per unit area
• SEM
• FTIR

关键词:

• 机织椰壳纤维纺织品
• 无纺布土工织物
• 抗拉强度
• 化学处理
• 单位面积质量