Heavy Falling Weight Deflectometer Test Procedure
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Heavy Falling Weight Deflectometer Test Procedure
Falling Weight Deflectometer (FWD) is used to measure the vertical deflection response of a surface to an impulse load. Precision load measurement and deflection sensors record the pavement surface characteristic, which is used to calculate pavement proper ties such as Bearing Capacity Layer Thickness E Moduli Expected Surface Life. FWD can also be used in determining the actual material used and in what combination to build the pavement surface. It also identifies voids underneath the surface or how two surfaces, typically concrete slabs, are in contact with each other.FWD is user-friendly with an automatic self-check of results, data is easily transferred to PC via the USB memory key or by a direct connection.
Type | Trailer type |
Hammer lifting | hydraulic type |
Power supply | traction device power, DC12V |
Deflection type | magnetoelectric speed sensor |
Deflection sensor qty | 9pcs |
Min. distance to earth | >20cm |
Deflection range | -2500μm~+2500μm |
Deflection measuring accuracy | better than 2% |
Deflection resolution | 0.1μm |
Capacity | 0~250kN |
Loading accuracy | better than 2% |
Loading plate | D300mm OR D450mm(4-side profile) |
Temp. range | -50℃~100℃ |
Temp. measuring accuracy | 0.005 |
Temp. measuring resolution | 0.1℃ |
Distance sensor accuracy | 0.001 |
Testing time for each point | 35s(3 hammer action) |
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Delivery time for sample: 1-2 working days; bulk order: 3 weeks; The goods can be shipped by DHL within 4 days.