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Since the year 2000, BRRC has been recognized as an accredited laboratory by BELAC.
BELAC is a Belgian accreditation body supervised by the Belgian Federal Public Service (FPS) Economy, SME, Self-Employed and Energy, which acts as an impartial third party to assess whether a given laboratory operates in accordance with the reference document in force and delivers an accreditation certificate if the laboratory passes the audit procedure.
In this method a constant head of 1 m of water is maintained on the soil. By continuously measuring the water to be added over a duration of at least 20 min, it is possible to determine the permeability of the subgrade soil.
A significant correlation between test results from a percussion sounding apparatus and the California Bearing Ratio (CBR value) has been established for fine soils ranging from silt to fine sandy soils I (D < 0,2 mm).
In a standardized form this equipment and test method can render invaluable services:
It has been quite a few years since nuclear measurement methods made their appearance in road construction to check the density of various materials in pavement structures. Yet there has been no proper breakthrough of such measurements in Belgium to date, whereas our neighbours have used the method sucessfully for several years.