Falling weight deflectometer manual

The Dynatest Falling Weight Deflectometer (FWD) applies a dynamic load that simulates the loading of a moving wheel. The pavement response is analyzed with Dynatest’s ELMOD (Evaluation of Layer Moduli and Overlay Design) software to determine the elastic moduli, stresses, and strains of each modeled layer. ELMOD reports the weakest layer of failure, . A Falling Weight Deflectometer is used to measure the vertical deflection response of a surface to an impulse load. Precision load measurement and deflection sensors measure and record the Pavement surface characteristic which are used to Estimated Reading Time: 1 min.  · Falling-Weight Deflectometers Calibration. Falling Weight Deflectometer (FWD) calibrations are critical for highway monitoring activities. FWDs must be calibrated and used properly, otherwise, measurements will be inaccurate. A first generation FWD calibration system was developed in the early s for the Strategic Highway Research Program's .

Abstract: This manual is intended for use in collection of Falling Weight Deflectometer (FWD) data for the Long-Term Pavement Performance (LTPP) program. As such, it contains background information on FWD equipment and the general role of FWD testing within LTPP as well as a set of field operations guidelines for the data collection process. The Dynatest Falling Weight Deflectometer (FWD) applies a dynamic load that simulates the loading of a moving wheel. The pavement response is analyzed with Dynatest’s ELMOD (Evaluation of Layer Moduli and Overlay Design) software to determine the elastic moduli, stresses, and strains of each modeled layer. ELMOD reports the weakest layer of failure, residual life and determines the optimum rehabilitation alternatives. A Falling Weight Deflectometer is used to measure the vertical deflection response of a surface to an impulse load. Precision load measurement and deflection sensors measure and record the Pavement surface characteristic which are used to calculate pavement properties. Download Brochure.

The Light-Weight Deflectometer (LWD) is a light weight portable tool used for measuring the bearing capacity (deflection) of subgrade/subsoils and unbound base. Ministry of Transportation Ontario Falling Weight Deflectometer (FWD) Testing The full FWD equipment calibration is a two-part procedure which includes. Falling Weight Deflectometer (LWD) has recently become available in Bangladesh. It is a portable, for intra-company monitoring (HMP LFG Manual, ).