The study examined the use of recycled tire-derived aggregate (TDA) mixed with kaolin for retaining wall applications. The effects of the TDA content on the geotechnical properties of TDA-kaolin specimens such as the internal friction angle, maximum dry density (MDD), optimum moisture content (OMC) and saturated density (SD) were investigated. A total of 13 physical model tests were performed on a polymer concrete retaining wall using kaolin and TDA-kaolin mixtures as backfill material. Powdery, shredded, small-sized granular (1–4 mm) and large-sized granular (5–8 mm) TDA were mixed with kaolin at contents of 0%, 20%, 40%, and 60% by weight. The lateral wall displacement was measured on a fabricated steel strip footing close to the wall during loading. Lateral wall displacement also was simulated using finite element (FE) software (Optum G2). The results indicated that the addition of 60% TDA decreased the internal friction angle of the samples up to 8% compared to pure kaolin. In addition, the TDA particles caused the MDD of the TDA-kaolin samples to decrease up to 45%. The physical modeling results indicated that the kaolin samples mixed with 60% shredded TDA showed the highest elasticity in all tests at the failure moment of the footing.

该研究检查了将再生轮胎衍生骨料 (TDA) 与高岭土混合用于挡土墙应用。研究了TDA含量对TDA-高岭土试件岩土特性的影响，如内摩擦角、最大干密度（MDD）、最佳含水量（OMC）和饱和密度（SD）。使用高岭土和 TDA-高岭土混合物作为回填材料在聚合物混凝土挡土墙上进行了总共 13 个物理模型测试。将粉状、切碎的小颗粒（1-4 毫米）和大颗粒（5-8 毫米）TDA 与高岭土按 0%、20%、40% 和 60% 的重量混合。侧壁位移是在加载过程中在靠近墙的预制钢带基础上测量的。还使用有限元 (FE) 软件 (Optum G2) 模拟了侧壁位移。结果表明，与纯高岭土相比，添加 60% TDA 可使样品的内摩擦角降低多达 8%。此外，TDA 颗粒导致 TDA-高岭土样品的 MDD 降低高达 45%。物理建模结果表明，混合了 60% TDA 的高岭土样品在所有测试中在基脚破坏时刻表现出最高的弹性。