GTA provides full depth reclamation (FDR) mix design testing for a variety of clients on a master service contract basis. FDR is a process that is used to upgrade distressed pavements for roadways and parking lots. The FDR process involves pulverizing the existing asphalt, aggregate base and subgrade soils and mixing them with cement and water. This material is compacted to create a new subbase layer that will support the new asphalt pavement. This “green” process produces very little waste and is often more economical than conventional methods of overexcavation and replacement. The FDR process is used for rural and urban paved roadways, parking lots, storage lots, and unpaved roadways.
The laboratory process involves grain size and plasticity limits of soil, California Bearing Ratio testing, moisture density of the FDR mixture, FDR mix design on samples mixed with three different percentages of cement, and unconfined compressive strength testing on the samples of FDR after a cure period of 7 days. Additional testing is often performed to evaluate particular constraints including freeze-thaw, durability, wet-dry durability, low temperature curing, and short-term strength development.
GTA’s master service contracts are held with numerous specialty contractors and civil engineers, as well as major energy companies including Chesapeake Energy, American Energy Partners, and Antero Resources. Since 2010, GTA has performed FDR mix design testing for over 700 miles of roadways in Pennsylvania, West Virginia and Ohio for the oil and gas industry. GTA also provides routine testing for municipal, state, and private clients in the Mid-Atlantic region.