The ability of the Landpac high energy impact compaction equipment to pre-stress material from the surface to a stress level higher than that which the material is likely to experience during service, makes it ideally suited for the application of “proof-rolling”. Such a process of proof-rolling is especially suited for detecting any weak areas associated with poor materials or excessive moisture conditions which can be improved by material replacement and/or remedial reworking.

The added capability of the Landpac CIR and CIS systems to provide a quantitative measurement of the material response and settlement during the proof-rolling process, allows for accurate identification of the relative strength of the entire area being proof-rolled. This enables an objective assessment to be carried out that can be utilised for pin point testing and accurate identification of any potential problem areas.

This proof rolling/induced settlement application involves the treatment of the entire site with repeated coverages using Landpac impact compaction equipment until the rate of settlement of the surface is minimised (typically less than 20mm over the previous 5 coverages). This process, commonly referred to as "compaction to refusal", greatly reduces the potential for future plastic deformation of the material and practically eliminates the potential for future differential settlement of the material under service loads.

The net result of this proof-rolling process is the provision of a technique that allows for a vastly increased level of certainty regarding the load bearing capacity and a reduction in the potential future settlement under load of the area being treated. This can in turn be used to ensure a greater level of confidence for the design of any engineering works that are to be performed on the area that has been proof-rolled.