Scope
This practice covers the determination of transvers and longitudinal application rate of asphalt distributors in gallons per square yard (or liters per square meter).
This standard does not purport to
address all of the safety concerns, if any, associated with it use. It is the
responsibility of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory limitations
prior to use.
The values given in inch-pound units
are to be regarded as the standard. The SI values given in parentheses are for
information purposes only.
Summary of Practice
Test Method A:
Pre-weighed calibration pads are
placed on the surface of the roadway in front of the distributor to be
calibrated. The asphalt distributor to be calibrated is driven over the
calibration pads while spraying asphalt. The calibration pads are removed from
the roadway any reweighed. The weight of asphalt applied to the pads is determined
by subtraction and the rate of application is calculated.
Test Method B:
Containers are placed under each nozzle of a bituminous distributor and bituminous material is sprayed into the containers for a known period of time. The volume of bituminous material sprayed after this period is calculated. The transverse uniformity of bituminous material sprayed on the pavement is obtained from this calculation and the distribution of bituminous material applied longitudinally on the pavement is calculated as a function of the distributor velocity
