Wang Xuliang, Dong Qinxi, Hu Jun, Liu Peng, Li Zetian, Chen Yongzhan, Xu Guoyang
School of Civil Engineering and Architecture, Hainan University, Haikou 570228, China.
Collaborative Innovation Center of Marine Science and Technology, Hainan University, Haikou 570228, China.
Materials (Basel). 2024 Sep 10;17(18):4448. doi: 10.3390/ma17184448.
In the context of efforts aimed at reducing carbon emissions, the utilization of recycled aggregate soil mixes for soil stabilization has garnered considerable interest. This study examines the mechanical properties of mixed soil samples, varying by dosage of a soft soil curing agent C, recycled aggregate R content, and curing duration. Mechanical evaluations were conducted using unconfined compressive strength tests (UCS), field emission scanning electron microscopy (FESEM), and laser diffraction particle size meter tests (PSD). The results indicate that the strength of the mixed soil samples first increases and then decreases with higher dosages of recycled aggregate, reaching optimal strength at a 20% dosage. Similarly, an increase in curing agent dosage enhances the strength, peaking at 20%. The maximum strength of the mixed soils is achieved at 28 days under various proportions. The introduction of the curing agent leads to the formation of a flocculent structure, as observed in FESEM, which contributes to the enhanced strength of the soil mixes. Specimens prepared with a combination of 20% R and 20% C, maintained at a constant moisture content of 20%, and cured for 28 days exhibit a balance between economic, environmental, and engineering performance.
在致力于减少碳排放的背景下，利用再生骨料土混合料进行土壤稳定化处理已引起了广泛关注。本研究考察了混合土样的力学性能，这些土样因软土固化剂C的用量、再生骨料R的含量以及养护时间的不同而有所变化。通过无侧限抗压强度试验（UCS）、场发射扫描电子显微镜（FESEM）和激光衍射粒度仪试验（PSD）进行力学评估。结果表明，随着再生骨料用量的增加，混合土样的强度先增大后减小，在用量为20%时达到最佳强度。同样，固化剂用量的增加会提高强度，在20%时达到峰值。在不同比例下，混合土在养护28天时达到最大强度。如FESEM观察所示，固化剂的引入导致形成絮凝结构，这有助于提高土混合料的强度。由20%的R和20%的C组合制备的试样，保持恒定含水量20%并养护28天，在经济、环境和工程性能之间展现出平衡。
