高膨胀(塑性)粘性土的膨胀势分析及其可持续掺合物稳定性

K. Onyelowe, M. Onyia, Duc Bui Van, A. Firoozi, Talal S. Amhadi
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引用次数: 3

摘要

综述了高膨胀土稳定过程中的膨胀势分析和离子交换反应。还讨论了这些因素在确定合适的建筑材料和化学添加剂作为粘土稳定的替代或补充粘合剂时的重要性。本研究结果表明,Al3+、Si4+和Ca2+是与OHas最合适的交换阳离子,形成C-A-S-H,这是负责强化的化合物。膨胀势分析还提出了wsT = 0.00216 ×作为总膨胀势相对于粘土基材料深度的表达式。该研究表明,在雨季,水力约束的基础材料经历了不理想的体积变化,在基础活跃(不稳定)区域的表面预期膨胀势最高。对于膨胀势非常大的高膨胀土,一般应集中在地表进行处理,并沿基基深度减少处理。在此指导下,利用替代或补充胶结材料作为施工材料稳定粘性土以改善膨胀,可以以更可持续的方式进行。
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Analytics of swelling potential on highly expansive (plastic) clayey soils behavior for sustainable admixture stabilization
The swelling potential analytics and the ion exchange reaction of highly expansive soils in a soil stabilization process have been reviewed. The importance of these factors in deciding suitable construction materials and chemical additives utilized as alternative or supplementary binders in clayey soil stabilization has been discussed also. The outcome of this study has shown that Al3+, Si4+, and Ca2+ are the most suitable exchangeable cations with OHas the suitable exchangeable anion leading to the formation of C-A-S-H, which is the compound responsible for strengthening. The swelling potential analytics also proposed the expression wsT = 0.00216 × as the total swelling potential with respect to the depth of a foundation material constructed with clayey soil. This study revealed that during the wet season, hydraulically bound foundation materials experience undesirable volume changes with the highest swelling potential expected at the surface within the active (unstable) zone of the foundation. Generally, the treatment of highly expansive soil with very high swelling potential should be concentrated at the surface and reduced along the depth of the foundation matrix. With this proposed guide, the utilization of alternative or supplementary cementing materials as construction materials in the stabilization of clayey soil to improve swelling can be conducted with a more sustainable approach.
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18
审稿时长
12 weeks
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