Experimental comparative analysis of laboratory compaction methodologies for stabilized soils

In pavement construction, major issues in recycling and reuse, are related with the materials showing poor mechanical characteristics and being strongly affected by water and frost. Hydraulic stabilization is a well known solution for most of these problems. However, the laboratory design of mixtures and the consequent verifications on the production are still time-consuming and, for this reason, frequently omitted. This study focuses on the mix design of clayey soils treated with lime, that is traditionally performed following the Proctor procedure; many authors have noticed a little correlation between this technique and the in situ roller compaction while, on the other hand, more analogies have been proven to exist with the Gyratory Compactor procedure (GC). This paper presents a comparison between these two compaction methodologies carried out on clayey lime stabilized materials, focusing on the volumetric compaction parameters and static and dynamic mechanical characteristics of dense samples. In particular, the resonant column is adopted as piece of equipment for assessing the dynamic mechanical characteristics of mixtures.