Runoff erosion control performance of structurally modified coir geomeshes on different soil type and slope angle

ABSTRACT

Geomeshes made up of coir fibers are a possible great alternative before vegetation establishes itself, and provides immediate soil erosion control on different types of slopes. In this study, coir geomeshes structure has been modified for better erosion over different soils. Different structurally modified coir geomeshes are tested for runoff erosion control, culmination discharge over loamy sand, silt loam, and silty clay loam soil at different slope angles. Lowest erosion control is observed over loamy sand due to higher amount of sand percentage. To know the overall effect of geomeshes, germination tests are also performed. It is observed that twill weave of coir geomeshes provides better erosion control due to the higher float length at the backside which reduces the water velocity. Twill weave geomeshes also provide better germination than plain and satin woven geomeshes. Overall, twill weave geomesh is preferred over loamy sand, silt loam, and silty clay loam at lower and medium slope angles.

摘要

以4%碱处理和未处理的Lagenaria Siceraria纤维（LSF）增强环氧树脂的新型农业废弃物为基础，采用4种不同纤维长度（3、5、7和9mm）和5种不同纤维含量（15、20、25、30和35wt.%）的压模技术制备复合层压板. 根据ASTM标准尺寸切割复合材料层压板，测试其拉伸、弯曲、压缩和冲击强度等力学性能. 当纤维长度增加到7mm，未处理和处理纤维的重量百分比增加到30%时，复合材料的力学性能得到提高，然而，参数的进一步增加（如纤维含量和纤维长度）会导致处理和未处理LSF增强复合材料的力学性能下降. 对断裂的复合材料层压板进行了扫描电子显微镜（SEM）研究，以分析纤维与基体的相互作用. 与其它复合材料相比，纤维长度为7mm、碱处理纤维质量分数为30wt%的复合材料具有更好的力学性能.

KEYWORDS:

• Soil texture
• erosion
• geomeshes
• coir
• germination

关键词:

• polymer composites聚合物复合材料
• mechanical properties机械性能
• epoxy环氧树脂
• natural fiber天然纤维
• scanning electron microscopy扫描电子显微镜
• alkaline treatment 碱性处理