3.16.2
Field Sampling of RMP Materials
3.16.2.1
Open Graded Bituminous Mixture
Samples of open graded bituminous mixture shall be taken from loaded trucks
for every 1,000 square meters yards of pavement, but not less than two
samples for each day of paving for determining asphalt content, aggregate
gradation, and laboratory compacted voids total mix. Laboratory specimens
of open graded bituminous material shall be compacted in 101.6 mm 4 inch
diameter molds to a 50.8 mm 2 inch thickness using 25 blows on one side
from a Marshall hand hammer. Test results from the sampled open graded
bituminous mixture shall be compared to the approved job-mix-formula and
approved by the Contracting Officer for acceptance. The tolerances given
in Table IV for sieve analysis, bitumen content, and temperature shall be
applied to quality control test results on the open graded bituminous
mixture as discharged from the mixing plant.
TABLE IV
JOB-MIX-FORMULA TOLERANCES
Tolerance,
Material
Plus or Minus
---------------------------------------------------------------
Aggregate passing 4.75 mm or larger sieves
4 percent
Aggregate passing 2.36 and 0.60 mm sieves
3 percent
Aggregate passing 0.075 mm sieve
1 percent
Bitumen
0.20 percent
Temperature of discharge mix
10 degrees C
Voids Total Mix
2 percent
TABLE IV
JOB-MIX-FORMULA TOLERANCES
Tolerance,
Material
Plus or Minus
---------------------------------------------------------------
Aggregate passing No.4 or larger sieves
4
percent
Aggregate passing Nos. 8 and 30 sieves
3
percent
Aggregate passing No. 200 sieve
1
percent
Bitumen
0.20
percent
Temperature of discharged mix
20
degrees F
Voids Total Mix
2
percent
3.16.2.2
Slurry Grout
Each batch of slurry grout shall be tested for viscosity at the jobsite
after thorough mixing and before application. Any batch of slurry grout
failing to meet the specified viscosity shall be rejected and removed from
the jobsite. Slurry grout with visible amounts of sand settling out of
suspension during application shall be rejected and removed from the
jobsite.
SECTION 02746
Page 25
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