ITEM 306.114 - RECLAIMED STABILIZED BASE PROCESSED IN
PLACE, 14” DEEP
A. SCOPE
This work shall consist of pulverizing the existing pavement together with subbase material to a
depth of 14 inches or as directed by the Engineer, removal and disposal of excess reclaim
material, fine grading to assure that finished surface matches existing gutter or as directed by the
Engineer, and compaction of materials to required densities. The surplus material removed from
this operation shall remain the property of the City of Nashua and shall be transported and stock
piled by the contractor at the Four Hills Landfill at 830 West Hollis St in Nashua.
B. MATERIALS AND CONSTRUCTION
The Contractor shall furnish all materials, labor and equipment necessary for reclaimed
stabilized base, processed in place, in accordance with relevant provisions of section 306 of the
NHDOT Standard Specifications for Road and Bridge Construction, latest edition.
Surface preparation shall be subsidiary and shall include (but is not limited to) weed removal,
occasional pruning of trees, and removal of any vegetation impeding the work.
At the start of compaction on each street, the maximum density for the street shall be determined
by compacting a short (100 foot minimum length) test strip at a suitable moisture content until no
further increase in density can be obtained. The densities shall be obtained by use of nuclear
density testing equipment. A new test strip may be required by the Engineer where there is a
significant change in the character of material.
Compaction shall be accomplished using a vibratory sheep’s foot roller or pad foot roller with at
least 50,000 Ibs. of dynamic force. Final rolling shall be accomplished by a smooth steel wheel
vibratory roller with at least 27,000 Ibs. of dynamic force. Contractor shall also provide
compaction equipment sufficient to achieve required densities in areas not accessible by larger
equipment.
The reclaimed stabilized base shall be compacted to at least 95% of the average density of the
test strip.
Fine grading to proposed grades shall be subsidiary. Removal, transportation, and disposal of
surplus material are subsidiary.
After the site has been fine graded and compacted, the Contractor will allow a minimum of 1
working day for the city to review compacted base. Acceptance of the compacted base shall not
change the Contractor’s sole responsibility to assure the finished pavement has no puddles and
that the gutter profile generally matches existing conditions.
All catch basins must be protected from reclaimed materials by use of silt sacks. All materials,
labor, equipment, and transportation necessary to install, maintain, and remove the silt sacks
shall be subsidiary, including disposal of material.
Page 4 of 43
