Geotechnics: Free Fall Deflectometer (FWD)

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GreenTechnologies®

We get accurate and reliable results

GreenTechnologies® offers dynamic testing to evaluate the physical properties of pavement on highways, paths, airport pavements, port areas, railways, and other locations using the Free Fall or Impact Deflectometer (FWD).

Our team subjects the pavement surface to a load pulse that simulates the loading of a vehicle wheel or the impact of an aircraft landing. The load pulse is produced by dropping a large weight onto a «damper» that shapes the pulse and is then transmitted to the pavement via a circular load plate. The data is obtained from various sensors for use in post-test analysis of pavement properties.

Deflection sensors are used to measure pavement deformation in response to the load pulse. It is a dynamic, non-destructive process and is applied on asphalt and concrete pavements. It measures the deflections and dynamic modulus of behavior of a pavement and the subsurface layers under different conditions. To have the correct results, it is necessary to have information from the Rodar® System. Time-domain microwave,  air-bonding GPR.

This technology is widely used and regulated in many countries.

Determine Load Transfer

It helps determine if the slabs are acting correctly in both directions.

Locate low support areas

Analyze the support underneath hydraulic concrete pavements and flexible pavements. This defines areas that require soil stabilization with geopolymeric technologies.

Estimate the elastic modulus of the layers with the support of the RODAR® System

This makes it possible to design an appropriate maintenance program and, in many cases, to define the relevant geopolymer solution.

Applicable to roads and airports

Only the diameter of the load plate is changed to perform the test. The DCP can also be used for empirical tests with the same results.

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GreenTechnologies®

Universal technology for road analysis

Since its application is regulated and the equipment is very reliable, its use has spread all over the world in the company of the RODAR® System that can measure layer thicknesses accurately.

Non-destructive and very fast testing

It opens the world of dynamic design to the edge and infrastructure life forecasting.

Universally accepted

Ministries of Communications and Transport around the world accept the results.

Road Maintenance

It provides excellent information for designing road maintenance programs.

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GreenTechnologies®

A World-Renowned Brand

For more than 30 years, GreenTechnologies® has been much more than a brand. We have been promoters of green businesses that preserve our environment. GreenTechnologies®, innovation and sustainability for a greener future.

FREQUENTLY ASKED QUESTIONS

About solutions in geotechnics: Free fall deflectometer

Let us help you clear your mind of any doubts about our geotechnics, Free Fall Deflectometer solutions, please do not hesitate to contact us with any additional questions.

We will be very excited to hear from you and assist you.

No, there are smaller and certainly lower impact force deflectometers that can be mounted on smaller vehicles and GreenTechnologies® has manual equipment aslo.

Yes, simply using the correct load plate makes it applicable on highways and airports. The appropriate load and plate are used to simulate the stresses on the appropriate pavement structure.

Yes. In all cases it is measured simultaneously.

Yes, it is most useful when applied with a geopositioner. The best equipment for measuring gaps is the air-coupled RODAR® System, however the FWD can also check for gaps under the pavement. At greater depths, the Rodar® conductivity-resistivity system can locate large voids and at greater depths.

Few road and track maintenance and rehabilitation programs can do without this type of information.

Yes. These are all state-of-the-art technologies developed primarily by the U.S. Department of Defense in collaboration with research institutes, private companies, and governments around the world to improve multimodal transportation systems.

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2600 south Shore Boulevard, Suite 300 League City, TX 77573

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