Application of Jute Fiber for the Improvement of Subgrade Characteristics
Application of Jute Fiber for the Improvement of Subgrade Characteristics
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黄麻纤维在改善路基特性中的应用
DOI：
10.11648/j.ajce.20150302.11
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. Hasan
中科院分区：
文献类型：
--
作者：
Md Akhtar Hossain;M. Hossain;M. Hasan
路基改良一直是公路和岩土工程师关注的领域。在高速公路的情况下，软弱的路基导致路面层的厚度更大，这增加了路面施工的成本。为了加强路基土壤，使用黄麻纤维是有利的，因为它们便宜，当地可用，可生物降解，环保。黄麻纤维与路基土的随机混合在过去的十年中对路基特性的改善产生了显着的影响。考虑到这一点，对当地可用的黄麻纤维加固土壤进行了实验研究。在这项研究中，土样制备在其最大干密度对应的最佳含水量在CBR模具有和没有钢筋。黄麻纤维占土壤干重的百分比分别为0.3%、0.6%、0.9%和1.2%。在本研究中，纤维的长度取为15 mm和30 mm，并且对于每种纤维长度考虑两种不同的直径（4 mm和8 mm）。从实验室测试的黄麻纤维含量对土壤的密度（最佳含水量和最大干密度）的影响，观察每个长度和直径的黄麻纤维。结果表明，随着黄麻纤维含量的增加，黄麻纤维各长度和直径的最佳含水率增加，最大干密度减小。测定了土和纤维增强土的室内CBR值。研究了黄麻纤维长径比对土壤CBR值的影响。试验结果表明，土的CBR值随黄麻纤维长度的增加而增大。还观察到，增加黄麻纤维的直径进一步增加了加固土的CBR值，并且这种增加在纤维含量为1.2%、纵横比为3.75（长度= 30 mm，直径= 8 mm）时是显著的。
Improvement in subgrade has always been an area of concern to highway and geotechnical engineers. In case of a highway, a weak subgrade results in greater thickness of pavement layer which increases the cost of pavement construction. To strengthen the subgrade soil, the use of jute fiber is advantageous because they are cheap, locally available, biodegradable, and eco-friendly. Jute fiber mixed randomly with subgrade soil has significant impact on the improvement of subgrade characteristics over the last decade. Keeping this in view an experimental study was conducted on locally available soil reinforced with jute fiber. In this study the soil samples were prepared at its maximum dry density corresponding to optimum moisture content in the CBR mold with and without reinforcement. The percentage of jute fiber by dry weight of soil was taken as 0.3%, 0.6%, 0.9%, and 1.2%. In the present investigation the length of fiber was taken as 15 mm and 30 mm, and two different diameters (4 mm and 8 mm) were considered for each fiber length. From the laboratory tests the effect of jute fiber content on density of soil (optimum moisture content and maximum dry density) was observed for each length and diameter of jute fiber. It was observed that the optimum moisture content increases and the maximum dry density decreases with the increase in jute fiber content for each length and diameter of jute fiber. The laboratory CBR values of soil and soil reinforced with fiber were determined. The effects of aspect ratio (length/diameter ratio) of jute fiber on CBR value of soil were also investigated. Test results indicate that CBR value of soil increases with the increase in length of jute fiber. It was also observed that increasing the diameter of jute fiber further increases the CBR value of reinforced soil, and this increase is substantial at fiber content of 1.2% for aspect ratio of 3.75 (length = 30 mm, diameter = 8 mm).