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This paper presents a study to investigate the effects of water content, lime content and compaction energy on the compaction characteristics of lime-treated loess highway embankments. Laboratory compaction tests were conducted to determine the maximum dry density  and optimum water content  of loess with different lime Contents (0, 3, 5 and 8%), and to examine the effects of water content, lime content and compaction energy on the value of  and . In situ compaction tests were performed to obtain the in situ dry density  and the degree of compaction  of different lime-treated loess. Experimental embankments with different fill materials (0, 3, 5 and 8% lime treated loess) were compacted by different rollers during in situ tests. The results indicate that  increases due to the increase of water content . Once water content exceeds , dry density  decreases dramatically. The addition of lime induced the increase of  and the decrease of . A higher compaction energy results in a higher value of  and a lower value of . The value of  achieves it’s maximum value when in situ water content  was larger than the value of  (+1-2%). The degree of compaction  can hardly be achieved to 100% in the field construction of embankments. Higher water content and compaction energy is needed for optimum compaction.

Study on the Compaction Effect Factors of Lime-treated Loess Highway Embankments