Polymer-based soil stabilization has fascinated substantial interest in the field of research intending to gain a better knowledge of the anticipated soil characteristics after polymer treatment. Intricate research on the engineering performance of expansive soil which is highly challenging due to its swell and shrink nature based on variations in water regime, treated with guar gum, a biopolymer made from gum along with polyethylene terephthalate fibre, one of the most generated plastics, resulting in massive waste, is accomplished through this entire experimental investigation. Comprehensive geotechnical tests and microstructural examinations have been performed to optimize the guar gum for enhancement of soil properties and to comprehend the interactive mechanism with the soil. The biopolymer at dosages 0.5%, 1%, 1.5%, and 2% was added to the soil. Polyethylene terephthalate Fibre with an aspect ratio of 28 is used with the soil at an increment of 0.4% up to 1.6%. The optimum dosage of biopolymer was mixed with polyethylene terephthalate fibres, and its effect on geotechnical properties was carried out separately. From the experimental investigations, it is comprehended that there is a reduction of 27% and 40% in plasticity index and swelling, respectively, at an optimum dosage of 0.5% GG when compared to untreated soil. Furthermore, there is a marginal decrease of 24% in dry density, 310% increase in CBR value, and 33% reduction in compressibility of the soil treated with 0.5% GG with 1.6% PET fibre, when compared to virgin soil. The present study was conducted to improve the subgrade soil strength beneath the pavements. The usage of biopolymer and its combination with polyethylene terephthalate fibres shows that there is a considerable improvement in modifying the geotechnical properties, and its coupling effect contributes to higher California bearing ratio values. According to the outcomes of this investigation, it is proven that biopolymer and polyethylene terephthalate fibre is definitely an alternate to conventional materials. The present study was conducted to improve the subgrade soil strength beneath the pavements.

中文翻译：

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瓜尔豆胶和聚对苯二甲酸乙二醇酯纤维改良黑棉土的岩土工程调查和微量分析

基于聚合物的土壤稳定化已经引起了研究领域的极大兴趣，这些研究领域旨在更好地了解聚合物处理后的预期土壤特性。对膨胀土的工程性能进行复杂的研究，由于其膨胀和收缩的性质基于水情的变化，用瓜尔豆胶处理，这是一种由树胶和聚对苯二甲酸乙二醇酯纤维制成的生物聚合物，这是一种产生最多的塑料，导致大量浪费，是通过整个实验研究完成的。已经进行了全面的岩土工程测试和微观结构检查，以优化瓜尔胶以增强土壤特性并了解与土壤的相互作用机制。剂量为 0.5%、1%、1.5% 的生物聚合物，2%添加到土壤中。纵横比为 28 的聚对苯二甲酸乙二醇酯纤维与土壤一起使用，增量为 0.4% 至 1.6%。生物聚合物的最佳用量与聚对苯二甲酸乙二醇酯纤维混合，其对岩土性能的影响单独进行。从实验研究中可以看出，与未处理的土壤相比，在 0.5% GG 的最佳用量下，塑性指数和膨胀率分别降低了 27% 和 40%。此外，与原始土壤相比，用 0.5% GG 和 1.6% PET 纤维处理的土壤干密度略有下降 24%，CBR 值增加 310%，压缩率降低 33%。本研究旨在提高路面下方的路基土强度。生物聚合物的使用及其与聚对苯二甲酸乙二醇酯纤维的结合表明，在改变岩土性能方面有相当大的改善，其耦合效应有助于提高加州承载比值。根据这项调查的结果，证明生物聚合物和聚对苯二甲酸乙二醇酯纤维绝对是传统材料的替代品。本研究旨在提高路面下方的路基土强度。事实证明，生物聚合物和聚对苯二甲酸乙二醇酯纤维绝对是传统材料的替代品。本研究旨在提高路面下方的路基土强度。事实证明，生物聚合物和聚对苯二甲酸乙二醇酯纤维绝对是传统材料的替代品。本研究旨在提高路面下方的路基土强度。