2010 Construction and Material Specifications - Ohio Department of ...

443.07
sample variability with SMA, a larger than usual sample size from which material
is obtained for the various tests is required.
443.07 Construction. At least 24 hours prior to beginning a test strip meet
with the Engineer and DET and provide a written summary of steps taken to assure
mix quality and construction practices account for the special needs of SMA
production and placement. Send a copy of the written summary to the Laboratory.
A. Test Strips and JMF Adjustment. Do not begin full production of the SMA
until receiving authorization from the District. This authorization will be based on
the successful construction of one or more test strips. Test strips consist of 50 to
100 tons of SMA produced and placed in accordance with these specifications.
Cease SMA production that day unless another test strip is needed. Place test
strips in one continuous mat. The test strip will be included in the first lot for
determining density for payment. Test strips are incidental to the pay item.
During the construction of a test strip, perform 1 set of quality control tests as
described above and obtain and test 3 random cores of the compacted pavement.
Within 1 working day after a test strip is completed, the District, the Laboratory
and the Contractor's Level 3 employee will determine if any changes in the SMA
JMF, production, or placement procedures are needed. A redesign of the JMF or
another test strip may be required. The Laboratory will notify the District of any
JMF adjustments. Do not start production until notified by the District.
B. Compaction. Start compaction immediately after the SMA has been placed
by the paver. Use only steel wheel rollers. Vibratory rollers in vibratory mode, set
at a high frequency and low amplitude, can be used as the breakdown roller only.
Always operate the breakdown roller immediately behind the paver. If isolated,
small fat spots develop, apply sand immediately during compaction. If continuous
and/or large fat spots develop, cease production until resolved. Do not compact
SMA that is below 230 ºF (110 ºC).
C. Hauling. Do not allow trucks to dump any mix on the project mat after
delivering mix to the paver. Provide a suitable place for bed cleaning off of the
mat.
443.08 Acceptance. After accepting the test strips, the Department will accept
SMA according to 446.05.
443.09 Basis of Payment. The Department will pay for accepted quantities of
Stone Matrix Asphalt Concrete, complete in place, including test strip, at the
contract price as modified by 446.05, as follows:
Item Unit Description
443 Cubic Yard Stone matrix asphalt concrete,
(cubic Meter) 12.5mm, PG70-22M, (446)
443 Cubic Yard Stone matrix asphalt concrete,
(cubic Meter) 12.5mm, PG76-22M, (446)
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