A series of triaxial compression tests were conducted to investigate the influence of the fiber content and confining pressure on the shearing characteristics of cement-stabilized clay reinforced with glass fibers. The glass fiber contents were 0, 1‰, 2‰, 3‰, and 4‰ by weight of the dry soil. The stress strain and volume change behavior, shear strength, and energy absorption of the test specimen were obtained. The results indicate that the inclusion of glass fibers can increase the shear strength, inhibit the volumetric dilation of the test specimen, and improve its brittle behavior. The cohesion of the cement-stabilized clay reinforced with 4‰ glass fiber content is 2.8 times greater than that of the cement-stabilized clay. The effect of the fiber content on the friction angle is not obvious. It is found that the glass fiber reinforcement is more substantial under a low confining pressure. The scanning electron microscopy test results show that the surface of the glass fiber is wrapped with cement hydrate crystals, which increases the bite force and friction between the fiber and the soil particles. A single fiber is similar to an anchor in the soil, which enhances the mechanical properties of the cement-stabilized clay reinforced with fibers.

中文翻译：

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玻璃纤维增​​强水泥稳定黏土的三轴剪切行为及微观结构分析

进行了一系列三轴压缩试验，以研究纤维含量和围压对玻璃纤维增​​强水泥稳定粘土的剪切特性的影响。玻璃纤维含量按干土重量计分别为0、1‰，2‰，3‰和4‰。获得了测试样品的应力应变和体积变化行为，剪切强度和能量吸收。结果表明，夹杂玻璃纤维可以提高剪切强度，抑制试样的体积膨胀，并改善其脆性。玻璃纤维含量为4‰的水泥稳定粘土的内聚力是水泥稳定粘土的2.8倍。纤维含量对摩擦角的影响并不明显。发现在低围压下玻璃纤维增​​强材料更加坚固。扫描电子显微镜测试结果表明，玻璃纤维的表面包裹着水泥水合物晶体，这增加了咬合力和纤维与土壤颗粒之间的摩擦。单纤维类似于土壤中的锚，这增强了用纤维增强的水泥稳定粘土的机械性能。