Abstract The geotechnical behavior of a mixture of kaolinite and vinyl polymers with different monomer types was investigated using a series of laboratory tests. Three polymers were selected for chemical treating including synthesized poly(styrene-co-butyl acrylate) and poly(methyl methacrylate–co-butyl acrylate), and one commercial polyvinyl acetate. All these polymers were chosen to have a similar glass transition temperature (Tg). A series of laboratory tests were conducted on the prepared samples, including Atterberg limits, unconfined compressive strength, direct shear, swelling potential, oedometer, triaxial tests, and scanning electron microscopy observation. The results showed changes in the soil microstructures and considerable improvement in shear strength parameters of clay with all monomer types. Also, the highest strength was obtained in the stabilized samples with polyvinyl acetate among three stabilizers. Conversely, the swelling parameters of the polyvinyl acetate stabilized soil increased compared to the unstabilized soil. Finally, the stabilized samples with poly(methyl methacrylate-co-butyl acrylate) demonstrated better performance in reducing the swelling and increasing the strength properties of soil.

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不同单体类型乙烯基聚合物稳定高岭石的实验室分析

摘要 使用一系列实验室试验研究了具有不同单体类型的高岭石和乙烯基聚合物混合物的岩土工程性能。选择了三种聚合物进行化学处理，包括合成的聚（苯乙烯-共-丙烯酸丁酯）和聚（甲基丙烯酸甲酯-共-丙烯酸丁酯），以及一种商业聚乙酸乙烯酯。所有这些聚合物都被选择为具有相似的玻璃化转变温度 (Tg)。对制备的样品进行了一系列的实验室测试，包括阿特伯格极限、无侧限抗压强度、直剪、溶胀势、固结仪、三轴试验和扫描电镜观察。结果表明，土壤微观结构发生了变化，所有单体类型的粘土的剪切强度参数都有显着改善。还，在三种稳定剂中，聚醋酸乙烯酯稳定样品的强度最高。相反，与不稳定的土壤相比，聚醋酸乙烯酯稳定的土壤的膨胀参数增加。最后，用聚（甲基丙烯酸甲酯-共-丙烯酸丁酯）稳定的样品在减少土壤膨胀和增加土壤强度方面表现出更好的性能。