8012 FAST FALLING WEIGHT DEFLECTOMETER
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8012 FAST FALLING WEIGHT DEFLECTOMETER (FastFWD) Dynatest, the original commercial developer of the Falling Weight Deflectometer (FWD), introduces the next generation FWD—the Dynatest FastFWD Model 8012. The FastFWD is designed to impart a load pulse to the pavement surface simulating the load produced by a rolling vehicle wheel. The load is produced by dropping a large weight on top of a set of rubber buffers on a bracket connected to a circular load plate. A load cell mounted on top of the plate measures the imparted load. Deflection sensors (geophones) mounted in and radially from the center of the load plate measure the deformation of the pavement in response to the load. The post processing software, Dynatest ELMOD (Evaluation of layer Moduli and Overlay Design) can be used to back-calculate the pavement layer moduli based on the impact load and surface deflection basin. The results can effectively be used for the evaluation of pavement structural condition and overlay design based on empirical or mechanistic- empirical pavement design guides. The FastFWD data can also be used to calculate the degree of load transfer between adjacent concrete slabs, and to detect voids under slabs in rigid pavements.

Less maintenance costs—no hydraulic system Nondestructive structural testing device Less impact due to reduced survey time Ideal for fast, comprehensive testing for mechanistic-empirical analysis and design ■ AVAILABLE UPGRADE OPTIONS ■ ELMOD SOFTWARE Evaluation of Layer Moduli and Overlay Design Evaluation of Layer Moduli and Overlay Design Wide loading range—900–27,000 lbf (4–120 kN); suitable for testing a variety of paved and unpaved roadways, parking lots and some airfield surfaces Excellent repeatability Single person operation Quiet operation Dynatest’s ELMOD software may be used for...