Long-term improvement in behaviour of soil subjected to lime treatment depends on the mechanism of its implementation. In-situ lime-treated fine-grained soil is often subjected to ‘kneading action’ developed by Pad-foot roller. The mechanism underlying the effect of kneading on lime-treated soil remains less investigated. Unconfined Compressive Strength (UCS) and microstructural modification of the lime-treated soil subjected to kneading compaction are evaluated. Kneading action undergoes better lime-dispersion during compaction. This feature accompanied with available water favours the long-term pozzolanic-reactions and hence enhanced the UCS evolution, particularly in the kneaded soil compacted at Wet Moisture Content (WMC). Lime-treated kneaded soil compacted at WMC, which is slightly higher than the Optimum Moisture Content (OMC) is beneficial for enhanced UCS evolution in specimens subjected to longer and accelerated curing. The UCS evolution in the laboratory accelerated-cured kneaded soil is of a similar level as the average UCS measured in the in-situ 7 years atmospherically cured kneaded soil.

经过石灰处理的土壤行为的长期改善取决于其实施机制。原位石灰处理过的细粒土壤通常会受到由 Pad-foot 压路机开发的“揉捏作用”。捏合对石灰处理过的土壤影响的机制仍未得到充分研究。评估了经过揉捏压实的石灰处理土壤的无侧限抗压强度 (UCS) 和微观结构改性。在压实过程中，捏合作用会更好地分散石灰。伴随可用水的这一特征有利于长期火山灰反应，因此增强了 UCS 的演化，特别是在湿水分含量 (WMC) 下压实的揉捏土壤中。在 WMC 压实的石灰处理过的土壤，略高于最佳含水量 (OMC) 有利于在经受更长时间和加速固化的样品中增强 UCS 演变。实验室加速固化捏合土壤中的 UCS 演变与原位 7 年大气固化捏合土壤中测量的平均 UCS 相似。