Mechanism of retarding dry shrinkage cracks in expanding soil modified with waste tire rubber particles
废旧轮胎橡胶颗粒改良膨胀土的干缩裂缝抑制机理

摘要

膨胀土因其特殊性质，在失水过程中易产生干缩裂缝，影响工程稳定性。本研究聚焦于废旧轮胎橡胶颗粒改良膨胀土的干缩裂缝抑制机理。通过一系列实验与分析，揭示了橡胶颗粒在改善膨胀土特性方面的作用。研究发现，橡胶颗粒可有效改变膨胀土的微观结构，降低其收缩性。具体而言，橡胶颗粒的掺入减小了土颗粒间的相互作用力，抑制了干缩裂缝的产生与发展。橡胶颗粒良好的弹性与变形协调性，增强了改良土的韧性。结果表明，合理掺量的橡胶颗粒能显著提高膨胀土抵抗干缩裂缝的能力，为膨胀土工程问题的解决提供了新的有效途径，也为废旧轮胎的资源化利用开拓了方向。

Abstract

Expanding soil exhibits inherent dry shrinkage cracks during dehydration due to its unique properties, which significantly compromise engineering stability. This study investigates the mechanism of crack inhibition in expanding soil modified with waste tire rubber particles. Through comprehensive experiments and analysis, the effects of rubber particles on soil characteristics were elucidated. The research demonstrates that rubber particles effectively alter the microstructure of expanding soil, thereby reducing its shrinkage tendency. Specifically, their incorporation decreases inter-particle interactions, inhibiting crack formation and propagation. The particles 'excellent elastic deformation coordination enhances soil resilience.
Results indicate that appropriate rubber particle dosage significantly improves expanding soil's resistance to dry shrinkage cracks, providing a novel solution for engineering challenges in expanding soil applications while opening new avenues for waste tire recycling.