Strength and swelling properties of a waste tire textile fiber-reinforced expansive soil
Strength and swelling properties of a waste tire textile fiber-reinforced expansive soil
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DOI：
10.1680/jgein.20.00010
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发表时间：
2020-10-01
影响因子：
4.5
通讯作者：
Hosseini, S. M. Mir Mohammad
中科院分区：
文献类型：
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作者：
Abbaspour, M.;Narani, S. S.;Hosseini, S. M. Mir Mohammad
膨胀土的承载能力相对较低，胀缩变形广泛，是膨胀土存在的问题。因此，通常认为在施工之前对这种土壤进行处理是必要的。本文研究了废旧轮胎处理过程中产生的副产物——废旧轮胎纺织纤维（WTTFs）作为膨胀土加固材料的再利用潜力。为此，通过一套标准压实、直剪、无侧限抗压强度（UCS）、加州承载比（CBR）和膨胀固结试验，对WTTF包合物对钠基膨润土的机械加固进行了评价。研究了6种不同的WTTF含量，即f(c) = 0%、0.5%、1%、2%、3%和4%。实验证明，WTTFs可以提高试件的抗剪强度和UCS参数。土壤的膨胀变形被证明可以减少多达44%。低WTTF含量时，CBR略有增强。然而，在高WTTF含量时，该参数降低。因此，wttf可以作为经济的膨胀土加固材料，提高膨胀土的强度参数，减轻膨胀特性，解决wttf的环境问题。
Expansive soils are problematic for their relatively low load bearing capacity and extensive swelling-shrinkage deformations. Therefore, treatment of such soils is often considered to be necessary prior to construction. This paper investigates the potential of reusing waste tire textile fibers (WTTFs), a byproduct of the treatment process of end of life tires (ELTs), as reinforcement materials for treatment of expansive soils. To that end, mechanical reinforcement of sodium bentonite by WTTF inclusion has been evaluated through a set of standard compaction, direct shear, Unconfined Compressive Strength (UCS), California Bearing Ratio (CBR), and swelling-consolidation tests. Six different WTTF contents - that is, f(c) = 0%, 0.5%, 1%, 2%, 3%, and 4% were used and investigated. It was proven that WTTFs can improve the shear strength and UCS parameters. Swelling deformations of the soil were demonstrated to reduce by as much as 44%. At low WTTF contents, CBR was enhanced marginally. However, this parameter decreased at high WTTF contents. Therefore, it can be concluded that WTTFs can be used as economical reinforcement materials in expansive soils to enhance the strength parameters, mitigate the swelling properties, and address an environmental concern regarding WTTFs.