Last March was imported from Germany, a deflectograph Light Impact (LWD, its acronym in English) ZFG 3000 Zorn Instruments. The computer determines the dynamic deflection module (Evd in MN / m2) and pavement subgrade for determining the bearing capacity and compaction of the materials used quickly, economically and easily.

The LWD, can be used as alternative to the assay plate static charge as indicated by the literature and the German regulations with advantages:

· Does not require a loaded for conducting the test truck, saving on costs and expanding applications testing.

· Can be used in confined spaces due to the size and lightness of equipment.

· High yields because each measuring point takes about 3 minutes on average.

· Provides accurate tests and recording automatically the measurements with time stamp and GPS coordinates.

Equipment joined with two 10 kg weights for one allowing pulse strength 7.07 kN and another 15 kg giving a pulse of 10.6 kN with load plate 300 mm.

Moreover an accessory brought to replace the load plate, to measure the in situ CBR materials. In the coming months we will be bringing you the results of different comparative studies are underway to determine the applicability of the equipment for determining these parameters.