ABSTRACT

This investigative study focuses on the response of full scale coir reinforced low volume roads when subjected to static loading. The test track of 1.736 km consists of a control section and eight reinforced sections including two types of coir geotextiles and subbase with varying thickness. An assessment of the general behavior of coir geotextile-reinforced sections, to static plate load tests, California Bearing Ratio tests, geogauge and dynamic cone penetration tests is done for evaluation. The study summarizes the results of the executed tests on the reinforced test track in comparison to the unreinforced one. The results reveal that the geotextile with higher apparent opening size is not as good as that of the finer mesh geotextile. A maximum of 112% improvement in the elastic modulus of subgrade is achieved by using a woven coir geotextile of 740 g/m² mass per unit area whereas 70% increment is attained while using an alternate geotextile of 365 g/m² mass per unit area. The elastic modulus values are determined from the various field tests and the overall damage analysis is carried out using KENPAVE software. From the analysis, it is noted that an appreciable decrease in the aggregate layer thickness is achieved by using coir geotextile as reinforcement. Use of coir geotextiles in pavements as a reinforcement can therefore help in reducing the demand and consumption of fast-depleting natural resources.

摘要

这项调查研究的重点是全尺寸椰壳纤维加固的小体积道路在静载荷作用下的响应。1.736公里的测试轨道由一个控制段和八个加筋段组成，包括两种类型的椰壳土工布和不同厚度的底基层。对椰壳土工布加固部分的一般性能进行评估，以进行静态板载荷测试、加利福尼亚轴承比测试、土工测量和动态锥形穿透测试以进行评估。该研究总结了在加固测试轨道上执行测试的结果，并与未加固测试轨道进行比较。结果表明，表观开孔尺寸较大的土工布不如细网孔的土工布好。²质量每单位面积，而在使用每单位面积 365 g/m ²质量的替代土工布时获得 70% 的增量。弹性模量值由各种现场测试确定，整体损伤分析使用 KENPAVE 软件进行。从分析中可以看出，使用椰壳土工布作为增强材料可以显着降低骨料层厚度。因此，在人行道上使用椰壳土工布作为加固材料有助于减少对快速枯竭的自然资源的需求和消耗。