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S.P. 8680-1652011 MnROAD Reconstruction
Pre-Letting Conference
April 8, 2011
Low Volume RoadMainline (I-94)
Stockpile Area
•Secured Area• Roadway Closed to Traffic
Cell 105-205
& 6
Cell 63 & 96
Demo Slab(200’)
XXXX
XXXXX
XX
Construction Timeline• Construction will begin July 11, 2011 or 8
days after notice to proceed, whichever is later
• Construction Completion Date is September 1, 2011
Removals Existing Cells105 205 106 206 63
4“(2% cross
slope)
4“(2% cross
slope)
2"64-34 2"64-34
4”
5" 5"1" PSAB 1" PSAB
8"58-28
93HMA
7.5"cracked'93 PCC
(1.5% cross slope)
7.5"'93 PCC
(1.5% cross slope)
6" Cl 1Stab Agg
6" Cl 1Stab Agg
6" class 5
5+”
12*+”
4”
* Subgrade will be excavated to 4% cross slopes.
Grading Work
• OGAB Special, subgrade cross slope 4%, top of base cross slope 2%– Base material to minimum 6” at centerline.
• OGAB Special will be continued and day lighted into ditches.
• Demonstration Slab (Demo Slab)= 6” OGAB Special
306 406
6" 6"
6+" OGAB Special 6+" OGAB Special
InstrumentationDays needed for instrumentation (Mn/DOT) after
- Excavation completion cell 6 (2 days)- Aggregate Base installed cell 6 (3 days)- Removal of concrete and PASSRC cell 5 (2 days)- Install geotextile fabric cell 5 (2 days)
Concrete Paving – 3 Mixes• Cell 505 and 605 Pavement Mix Design shall comply with the
following– CA-15 coarse aggregate gradation.
• Cell 306 Pavement Mix Design shall comply with the following:– CA-35 coarse aggregate gradation.
• Cell 406 Pavement Mix Design shall comply with the following:– Either a CA-15 or CA-35 coarse aggregate gradation.
• Cell 505, 605, 306, 406 shoulders, and Demonstration Slab:– Provide Roller Compacted Concrete (RCC) as per specifications.
Finished Textures
Cell 306 and 406 – Longitudinal Tining
Cell 505 and 605 – Transverse Broom
Cell 63 and 96 – Traditional Grind
Demonstration Slab
1. Located in the stockpile area
2. 200’ long
3. Same operations as shoulders on cell 6
* 4” RCC Concrete
* 6” OGAB Special
* Installed at 4% cross slope.
4. Goal for the demo slab* Experience with materials
* Experience with RCC placement
* Experience with OGAB Special.
Demonstration Slab 200' long x 8' wide
4" RCC
6" OGAB Special
Shoulders
• Cell 505 and 605– RCC Placed directly
on existing materials.– Wick Drains to be
installed prior to paving
– Cell 505 shoulders will be jointed similarly to mainline
– Cell 605 – no joints
• Cell 306 and 406– RCC placed on
OGAB Special– Cell 306 shoulders
will be jointed similarly to mainline.
– Cell 406 – no joints
Cell 63 and 96
• 4” x 5’ x 6’ misc. concrete panel repair in cell 63.
• Both cells 63 and 96 will receive a traditional concrete grind
Extra Research QuantitiesDemonstration Slab• 4” RCC pavement 8’ x 200’• 6” OGAB special 10’ x 202’
Research Samples• 1 cubic yard extra of each concrete mix (3 mixes total)• 15 cubic yards extra of OGAB Special