The use of cohesive soils improved with lime as an example of circular economy in earthworks

A common practice in civil engineering during earthworks is the usual replacement of cohesive soils (fine soils), excavated earthworks, with non-cohesive (coarse soils). Until recently, such a procedure was dictated primarily by economic and technical reasons. From an point view, ease access therefore low cost using instead crucial. The reason is, above all, compacting fine (as opposed to soils) well-developed well-known methods for controlling their compaction.
 situation changed radically when new environmental regulations came into force enforcement inspection authorities began. Currently, soil removed from construction site according should be classified as waste. This fact has completely approach participants process use local soils, especially (e.g. clays). Their "on site" stopped being expensive option become necessity.
 paper presents aspects lime-improved that can successfully used on excavation backfill. Problems related proper preparation soil-lime composites are described, well results compaction tests. author's own methodology selecting content quicklime composite.