氢氧化钾处理聚丙烯纤维对红壤的稳定作用

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摘要

红壤在工程领域的应用不像其他土那样广泛。因此,通过添加氢氧化钾处理过的聚丙烯纤维来稳定红壤的试验开始了。本项目工作旨在探讨添加0%、0.25%、0.5%、0.75%、1%、1.25%处理过的聚丙烯纤维对红壤的稳定作用。对其稠度、压实性能和强度参数进行了测试。本课题研究了处理后的聚丙烯纤维的添加效果,并与未处理的红壤进行了比较。测试程序分两个阶段进行。第一阶段通过比重、粒度分布、液限、塑限、UCS和CBR试验对红壤样品的理化性质进行了研究。在试验方案的第二阶段,将红土与处理过的聚丙烯纤维按红土干重百分比的0%、0.25%、0.5%、0.75%和1%混合。在掺入不同比例的聚丙烯纤维并进行各种试验后,我们可以观察到,在0.75% PP纤维时,UCS值提高了93.12%,这表明加入聚丙烯纤维后可以承受更高的载荷。MDD值也增加了3.3%。聚丙烯纤维掺量为0.75%时,浸渍CBR值由4.24%提高到6.37%,表明可用于地下水位较高地区的路面。聚丙烯纤维添加量为0.75%时,未浸渍CBR值由8.32%提高到11.06%。说明在高速公路和铁路中,增加路面的坡度可以提高边坡的稳定性,同时减少路面的厚度,降低施工成本。因此,我们观察到处理后的聚丙烯纤维用量为0.75%,可以稳定红壤
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Stabilization of Red Soil using Potassium Hydroxide Treated Polypropylene Fiber
Red soil is not commonly used alike other kind of soils in engineering field. So, a trial is created to stabilize the red soil by adding potassium hydroxide treated polypropylene fibers. This project work aims to search out the effect of addition of 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25% treated polypropylene fibers to stabilize the red soil. Its consistency properties, compaction properties, and strength parameter are tested. In this project the results of addition of treated polypropylene fiber is investigated and is compared therewith of the untreated red soil. The testing program was conducted in two phases. Within the first phase, the physical, and chemical engineering properties of the red soil samples were studied by conducting Specific gravity, Grain size distribution, Liquid limit, Plastic limit, UCS and CBR Tests. Within the second phase of the test program, red soil was mixed with 0%, 0.25%, 0.5%, 0.75%, and 1% of treated polypropylene fiber as percentage of dry weight of red soil. After mixing different percentage of polypropylene fiber and conducting various tests we ought to observed that the value of UCS was increased by 93.12% at 0.75% PP fiber, which makes clear that higher load can be beared after adding it. The value of MDD was also increased by 3.3 %. The soaked CBR value has been increased from 4.24% to 6.37% with 0.75% of polypropylene fiber by which it’s cleared that it can be used for pavement in areas where water table is high. Unsoaked CBR value has been increased from 8.32% to 11.06% with 0.75% of polypropylene fiber.Which make clear that we can increases the slope of pavement for stability of slope and also reduce the thickness of pavement in highway and railway which reduces the cost of construction.So, we observed that 0.75 % of treated polypropylene fiber can be used to stabilize the red soi
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