Dynatest FWD/HWD Test Systems

Dynatest, the original commercial developer of the Falling Weight Deflectometer (FWD) technology, is the world’s largest supplier of FWD equipment.

This highly accurate, well supported, reliable and continuously refined Dynatest product line is a proven load/deflection measurement solution for engineers worldwide.

The Dynatest FWD technology additionally provides a measurement foundation for the proprietary Dynatest "analytical-empirical" pavement engineering methodology, a system of advanced automated pavement measurement, analysis and management engineering services and products available only through Dynatest.

Advantages:

• A non-destructive test device.
• One man operational.
• Accurate and fast (up to 60 test points/hr).
• Wide loading range:

FWD: (7-120 kN) or (1,500-27,000 lbf).
HWD: (30-240 kN) or (6,500-54,000 lbf).

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Why a Falling Weight Deflectometer (FWD)?

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FWD Data Reduction

The Dynatest Model 8000 FWD makes it possible to treat pavement structures in the same manner as other civil engineering structures by using mechanistically based design methods.

Selecting the type of rehabilitation to be implemented on a given pavement is of considerable economic significance.
To reach that decision without an adequate knowledge of the structural condition of the pavement may have very costly consequences.

This information can in turn be used in a structural analysis to determine the bearing capacity, estimate expected life, and calculate an overlay requirement, if applicable (over a desired design life).

The use of a Dynatest FWD enables the engineer to determine a deflection basin caused by a controlled load with accuracy and resolution superior to other existing test methods.

The FWD produces a dynamic impulse load that simulates a moving wheel load, rather than a static, semi-static or vibratory load.
These developments allow the use of mechanistic approaches to analyse FWD data.

Dynatest Model 8000 Falling Weight Deflectometer

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Heavy Weight Deflectometer (HWD)

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Software Products for Structural Analysis and Design

Dynatest Model 8082 Heavy Weight Deflectometer

Dynatest was also the first to introduce a heavier loading FWD, the Dynatest Model 8081 HWD.
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The wider loading range also provides the consultant with a load/deflection instrument appropriate for both roads and airfields as required.

This software application allows extremely rapid data reduction and analysis of FWD/HWD measurements, calculating the layer E-moduli for a typical drop sequence in one second or less.
Seasonally adjusted E-moduli, residual life, and required overlay (if applicable) are also calculated within seconds.

For analysis of airfield pavements, Dynatest provides a program, which calculates PCN-values in accordance with the ACN/PCN method, as described in the ICAO design manuals.

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A single-axle Dynatest 8081 HWD with self supplied power from an on-board power generator unit.

The new Compact15 (CP15) embedded PC control and signal processing unit replaces the joint functionality of the Dynatest 9000 System Processor, the Trailer PCB and the Hydraulic Connection Box.

.Compact15
The embedded PC control
 and Processing Unit.

Requirements

Windows XP.

See also the TMD (The Model 8000 Truck Mounted Falling Weight Deflectometer)

Dynatest 8000 TMD (Truck Mounted Deflectometer)

Support for multiple languages.

Data Files:

• Data is stored in Access™ (.mdb) databases for ease of processing.

The program can simultaneously generate various formats:

• *.fwd, *.f20, *,f25, *.pddx Pavement Deflection Data eXchange (PDDX by AASHTO), *.xml eXtensible Markup Language (XML by W3C).
• 15 Active Sensor Capability (hardware required)
• Surface modulus plots can be graphed real time along road sections under test.
• Real Time Backcalculation.
• Network Database.

Download trial version
 of the FwdWin Field Program

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HWD streaming video .wmv (1.2 Mb)

Click here for
Equipment Service and Support Departments

Dynatest International
rev. 040101-10