How many models of falling weight deflectometer

Traffic system plays an important role in city development. With the development of society, the standard of road construction is getting higher and higher. Therefore, falling weight deflectometer has become an indispensable tool for engineers in road construction. Pavement deflection test is the main means to establish structural parameters, It has been proved that falling weight deflectometer is an important tool for nondestructive assessment of existing pavement.

Main points of this article

1. What’s falling weight deflectometer

2. Portable light falling deflectometer (LWD)

3. Heavy falling weight deflectometer (HWD)

4. Falling weight deflectometer (FWD) 

What’s falling weight deflectometer

Falling Weight Deflectometer (FWD) is a test device apply to road capacity measure. It’s designed to simulate the load of wheels passing through the road surface and to measure their vertical deflection response to the load in order to estimate the structural capacity of the road surface. Falling weight deflectometer mainly used by civil engineers. It’s a essential device in modern road construct. And there are many different models of falling weight deflectometer like Portable light falling deflectometer, Heavy falling weight deflectometer, and Falling weight deflectometer, each of them has their unique characteristics.

Portable light falling deflectometer (LWD)

The Portable light falling deflectometer (LWD) is a portable version of Falling Weight Deflectometer (FWD). The Portable light falling deflectometer (LWD) uses a weighing sensors and seismic geophones with the same accuracy as the Falling Weight Deflectometer. So, don’t worry about accuracy because it’s portable version. The Portable light falling deflectometer (LWD) has a wide range of applications. It can be used to test a series of different pavements like

thin asphalt pavement, recyclable materials bonded with foamed asphalt, and direct testing of unbonded roadbed and subgrade. The data output from the Portable light falling deflectometer (LWD) can be used to calculate the strength of multiple pavement layers.

Heavy falling weight deflectometer (HWD)

Compare with Portable light falling deflectometer (LWD), Heavy Weight Deflectometer (HWD) is a falling weight deflectometer that uses higher loads.  Maximum load for HWD are typically around 300 kN and 600 kN. This load enable it to simulate some most extreme vehicle loading such as Boeing and Airbus, therefore, Heavy Weight Deflectometer (HWD) used primarily for testing airport pavements. Heavy falling weight deflectometer (HWD) uses mechanistic analysis, which means it can test most of pavement structures, Heavy falling weight deflectometer (HWD) has a wide range of use, The output from the deflectometer can be used to Improve and understand pavement condition, help to do pavement research and  management, determine the layer of failure and the best rehabilitation solutions. The most important is heavy falling weight deflectometer cam simulate the load of aircraft and ship, so it can be used to investigation and evaluation the pavement of aircraft runway and harbor area.

Falling weight deflectometer (FWD)

Falling weight deflectometer (FWD) is a requisite device in many field, it can be useful for a variety of application that range from construction verification pavement management system, estimate pavement structural to assessment of pavement remaining life. It has an irreplaceable role in the construction of modern roads.

Here is TBT, technology development and upgrading has always been an important task for our company. We have different models of falling weight deflectometer for customers to choose, like portable falling weight deflectometer, heavy falling weight deflectometer, You can always find the right project for your project by visiting our website.