School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China.
School of Civil Engineering, Shenyang Jianzhu University, Shenyang, People's Republic of China.
Environ Technol. 2024 Sep;45(21):4243-4254. doi: 10.1080/09593330.2023.2245542. Epub 2023 Aug 16.
To alleviate the application limitations of cement-stabilized soil in impermeable engineering and promote the recycling of waste rubber tires, crumb rubber produced from waste rubber tires was used to improve the engineering properties of the soil. The effect of crumb rubber on the permeability of the soil under different conditions was investigated using compression, compaction, and permeability tests. Crumb rubber can effectively improve the impermeability of cement-stabilized soil. The impermeability efficiency of crumb rubber is between 11% and 45%. Cleaning crumb rubber with water and NaCO solution can reduce the hydraulic conductivity of rubberized cement-stabilized soil (RCSS) by 7.9%-63.6%. This, in turn, increases the unconfined compressive strength by 4.1%-25.5%. The hydraulic conductivity of the RCSS decreases with an increase in the cement content, curing duration, and void ratio. A crumb rubber concentration of 10%-20% is suitable for enhancing the impermeability of the RCSS and satisfying its strength requirements. The NOF of the equation used to predict the hydraulic conductivity of the RCSS by the rubber content, cement content, and curing duration is less than 0.35. The linear correlation between the predicted and measured values of hydraulic conductivity was determined to be 0.995 from the - correlation model. The results show that the hydraulic conductivity of RCSS can be estimated reliably based on the mix ratio and compressive strength.
为缓解水泥稳定土在防渗工程中的应用局限性，促进废橡胶轮胎的循环利用，采用废橡胶轮胎生产的胶粉改善土的工程性质。通过压缩、压实和渗透试验研究了胶粉在不同条件下对土渗透性的影响。胶粉能有效提高水泥稳定土的防渗性能，胶粉的防渗效率在 11%至 45%之间。用清水和 NaCO 溶液清洗胶粉，可使橡胶水泥稳定土（RCSS）的水力传导系数降低 7.9%至 63.6%，从而使无侧限抗压强度提高 4.1%至 25.5%。RCSS 的水力传导系数随水泥含量、养护时间和空隙比的增加而降低。10%-20%的胶粉浓度适合提高 RCSS 的防渗性能并满足其强度要求。预测 RCSS 水力传导系数的方程中，橡胶含量、水泥含量和养护时间的 NOF 小于 0.35。通过相关模型确定了水力传导系数的预测值和实测值之间的线性相关性为 0.995。结果表明，可根据混合比和抗压强度可靠地估计 RCSS 的水力传导系数。
