maximum allowable revolutions per minute.
3.11
PLACING SLURRY GROUT
Temperature of the bituminous mixture shall be less than 38 degrees C 100
degrees F before applying grout. Each batch of slurry grout shall be
tested at the job site immediately before placement and shall be used in
the finished product only if it meets the requirements specified in
paragraph ACCEPTABILITY OF WORK. The slurry grout shall be spread over the
bituminous mixture using a spreader or squeegees. The application of the
slurry grout shall be sufficient to fill the internal voids of the open
graded bituminous mixture. The grouting operation shall begin at the
lowest side of the sloped cross-section and proceed from the low side to
the high side. The practical limit for the surface slope of an RMP section
is 2 percent. Pavement slopes up to 5 percent can be constructed, but
excess hand work and grout overruns are to be expected at slopes greater
than 2 percent. The slurry grout shall be placed in successive paving
lanes with a maximum width of 6 meters 20 feet. The use of strips of wood
lumber or foamed rubber to separate each of the grouting lanes and the RMP
from adjacent pavements is optional. The direction of the grouting
operation shall be the same as used to pave the open graded bituminous
mixture. The small (1.8 metric ton 2 ton maximum) tandem steel wheel
roller (vibratory mode) passing over the grout covered bituminous mixture
shall be used to promote full penetration of the slurry grout into the void
spaces.
3.12
JOINTS
3.12.1
Joints Between Successive Lanes of RMP
Joints between successive lanes of RMP shall be made ensuring a continuous
bond between the paving lanes. All RMP joints shall have the same texture,
density, and smoothness as other sections of the course.
3.12.2
Joints Between RMP and Adjacent Pavements
Joints between the RMP and any surrounding pavement surfaced with portland
cement concrete shall be saw cut to the full thickness of the RMP layer and
filled with a joint sealant material approved by the Contracting Officer.
3.13
CURING
The curing compound shall be applied to the finished pavement surface
within 2 hours of the completed slurry grout application. The curing
compound shall be applied by means of a pressurized spraying machine.
Application of the curing compound shall be made uniformly in one or two
coats with a total application rate of not more than 10 square meters per
liter 400 square feet per gallon.
3.14
PROTECTION OF GROUTED PAVEMENT
The Contractor shall protect the pavement and its appurtenances against
both public traffic and traffic caused by the Contractor's employees and
agents for a period of 21 days. Any damage to the pavement occurring prior
to final acceptance shall be repaired or the pavement replaced at the
Contractor's expense. In order to properly protect the pavement against
the effects of rain before the pavement is sufficiently hardened, the
Contractor shall have available, at all times, materials for the protection
of the edges and surfaces of the unhardened RMP. The protective materials
SECTION 02746
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