DRP has experience in a wide range of durability issues that include alkali-aggregate reaction (both alkali-silica and alkali-carbonate reaction), sulfate attack and other forms of chemical attack, deicer scaling, freeze-thaw damage, carbonation and corrosion issues, and salt weathering, among others. We are not satisfied with merely diagnosing the occurrence of a progressive deterioration mechanism, but take the extra step of assessing and documenting its impact on the performance of the material.