A subsidence occurred in recently completed road section in Jüri small town for unknown reasons, causing asphalt to collapse in 1.5 m radius. In the event of using traditional method, entire subsidence area would have been excavated and soil newly compacted. That would have taken at least two days and involved exploitation of heavy-duty machinery.
Client decided to use URETEK technology. Subsidence was filled with sand; concrete blocks were placed on top of the subsidence to achieve maximum soil compaction; and geopolymer was injected into the soil. Entire process took two hours and no new problems have been reported.