Bituminous mixtures. Test methods. Wheel tracking
93.080.20 - Road construction materials
Reemplaza a: BS EN 12697-22:2003
This document describes test methods for determining the
susceptibility of bituminous materials to deform under load. The
test is applicable to mixtures with upper sieve size less than or
equal to 32 mm.
The tests are applicable to specimens prepared from asphalt
mixtures that have either been manufactured in a laboratory or cut
from a pavement; test specimens are held in a mould with their
surface flush with the upper edge of the mould.
The susceptibility of bituminous materials to deform is assessed
by the rut formed by repeated passes of a loaded wheel at constant
temperature. Three alternative types of device can be used
according to this standard: large-size devices, extra large-size
devices and small-size devices. With large-size devices and extra
large-size devices, the specimens are conditioned in air during
testing. With small-size devices, specimens are conditioned, in
either air or water.
Large-size and extra large-size devices are not suitable for
use with cylindrical cores.
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