Hire-Clegg Impact Soil Tester

Irrespective of meeting a density specification for roadworks* and trench reinstatement, etc, insufficient strength / stiffness can lead to failure, typically if the material is too wet prior to opening to traffic or sealing. One of the uses of the Clegg Hammer is to monitor the improvement in strength / stiffness through drying out so that a certain minimum Clegg value is obtained in order to help prevent such failures as a result of too much moisture, be it residual moisture from the compaction process, flooding, precipitation or groundwater – where, for example, undetected inflow from the shoulders or underground springs can lead to serious problems. The rapid and simple nature of making Clegg Impact Tests allows for large areas to be scanned rapidly by one person. The portable nature of the Clegg Impact Soil Tester allows for testing in remote or difficult to access areas. The non-destructive nature of the method obviates driving rods down into a finished layer which could lead to potholing.