Theogene Sindambiwe, Sun Jianxiu, Wang Yanzi, Xu Run, Sun Jie, Tao Yuchen, Zhang Changyong, Sun Qingshuo, Wu Jiandong, Yue Hongya, Zhang Hongbo
School of Qilu Transportation, Shandong University, Jinan 250100, China.
Shandong Provincial Communications Planning and Design Institute Co., Ltd., Jinan 250101, China.
Polymers (Basel). 2025 Aug 5;17(15):2144. doi: 10.3390/polym17152144.
Every year, a billion tires are discarded worldwide, with only a small percentage being recycled. This leads to significant environmental hazards, such as fire risks and improper disposal. Silty sand also presents technical challenges due to its poor shear strength, susceptibility to erosion, and low permeability. This study explores the incorporation of crumb rubber derived from waste tires into silty sand to enhance its mechanical properties. Crumb rubber particles of varying sizes (3-6 mm, 5-10 mm, and 10-20 mm) were mixed with silty sand at 0%, 3%, 6%, and 9% percentages, respectively. Triaxial compression tests of unconsolidated and consolidated undrained tests with cell pressures of 100, 300, and 500 kPa were conducted. The deviatoric stress, shear stress, and stiffness modulus were investigated. The results revealed that the addition of crumb rubber significantly increased the deviatoric and shear stresses, especially at particle sizes of 5-10 mm, with contents of 3%, 6%, and 9%. Additionally, the stiffness modulus was notably reduced in the mixture containing 6% crumb rubber tire. These findings suggest that incorporating crumb rubber tires into silty sand not only improves silty sand performance but also offers an environmentally sustainable approach to tire waste recycling, making it a viable strategy for silty sand stabilization in construction and geotechnical engineering performance.
每年，全球有10亿条轮胎被丢弃，只有一小部分被回收利用。这导致了重大的环境危害，如火灾风险和不当处置。粉砂由于其抗剪强度差、易受侵蚀和渗透率低，也带来了技术挑战。本研究探讨了将废旧轮胎衍生的橡胶颗粒掺入粉砂中以增强其力学性能。分别将不同尺寸（3 - 6毫米、5 - 10毫米和10 - 20毫米）的橡胶颗粒与粉砂按0%、3%、6%和9%的比例混合。进行了围压为100、300和500千帕的不固结不排水三轴压缩试验。研究了偏应力、剪应力和刚度模量。结果表明，添加橡胶颗粒显著提高了偏应力和剪应力，特别是在粒径为5 - 10毫米、含量为3%、6%和9%时。此外，含6%橡胶轮胎的混合物的刚度模量显著降低。这些发现表明，将橡胶轮胎掺入粉砂中不仅改善了粉砂性能，还为轮胎废料回收提供了一种环境可持续的方法，使其成为建筑和岩土工程中粉砂稳定化的可行策略。
