WisDOT will perform non-destructive testing consisting of Falling Weight Deflectometer
(FWD) and Ground Penetrating Radar (GPR) testing to determine the strength characteristics and thicknesses of underlying pavement layers.
It collects data using a PRIMAX falling weight deflectometer
and other testing equipment for its RoSy airport pavement management system to help customers make the right strategic budget decisions with regards to maintenance and construction work.
2 Moire deflectometer
Rotlex Contest Plus Annex B Shack-Hartmann Optocraft Annex B wavefront SHSOphthalmic Phase-shifting Lambda-X TR1504 -- schlieren
The company is now using “TERRATEST 5000 BLU” device which is the world's first light weight deflectometer
with Bluetooth and voice navigation technology by TERRATEST.
The load bearing capacity of sections A and B were tested using a falling weight deflectometer
The method uses data collected from a falling weight deflectometer
(FWD), which imparts a dynamic load to the pavement surface that is similar to that of a single heavy moving wheel load.
The next step would be to conduct falling weight deflectometer
testing for these sections to determine which roads have adequate soils and granular base and which would require full reconstruction.
For the last two decades, the predominant form of deflection testing for both project-level and network-level pavement evaluation has been the falling weight deflectometer
During recent years, research works have been performed to develop dynamic stiffness measuring devices such as Portable Falling Weight Deflectometer
(PFWD) that can quickly measure the in-situ stiffness of unbound pavement layers (Peterson et al.
mounted on an alloy aluminum frame was suspended from the specimen neutral axis over the outer supports to measure the midspan deflection relative to the support points.
compile papers by an international group of engineers on such topics as imaging analysis, non-destructive testing, and laboratory and field testing techniques; materials such as subgrade soil, pavement base, and hot-mix asphalt mixtures; and analysis of responses under falling weight deflectometer
, stress dependent pavement foundation, and critical gear configurations.
However, versions of the new Traffic Speed Deflectometer
(TSD) will not be in operation until 2009.