GPR is not a replacement for either FWD or Coring data. It is rather an enhancement to these techniques. FWD gives you a deflection measurement of the pavement surface but cannot give you an accurate strength reading unless combined with accurate layer thicknesses and material type obtained from construction plans or coring samples.

Coring at the point of the FWD reading will provide accurate layer thickness and material type thereby giving an accurate strength and construction reading for that specific point on the road. Where our GPR is of enormous benefit is in stitching this data together to give you a more accurate and overall condition and construction report of the surface and subsurface of the entire road length and width.

GPR achieves this by allowing the user to indentify the different layers, their rough thicknesses and any changes of construction or anomalies across the entire width and length of the road. This allows engineers to better locate points for both FWD and Coring samples to be taken and identify where the results of the FWD and coring samples are accurate and inaccurate across the road width and length.

Therefore our surface imagery combined with our NM-GPR completes the picture of the entire road surface and subsurface condition. When combined and calibrated with FWD and Coring data it provides a more accurate and comprehensive picture of the roads construction and condition.