Aggregate Natick CG.doc
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- Attached to
- RECOVERY - BESSEY COMPLEX REC SITE IMPROVEMENTS - BESSEY RANGE DISTRICT - NEBRASKA NATIONAL FOREST
- Solicitation number
- AG-82B1-S-10-0244
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Aggregate - Natick Campground - Item 3
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SECTION 02616
ROADWAY AGGREGATE SURFACING
PART 1 - GENERAL
1.1 SUMMARY
A. Place aggregate surfacing on campground road and campsite turnouts constructed under these specifications.
B. Supply and install aggregate in rock crossing.
C. Contractor shall submit to the Contracting Officer (CO) for approval aggregate source and certified sieve analysis. Approval shall be given prior to placing aggregate surfacing.
D. Contractor must receive subgrade approval from the CO before beginning aggregate placement.
PART 2 - PRODUCTS
1.2 gravel (bid items 10 and 12)
A. Surfacing material shall be composed of 80% aggregate and 20% clay.
B. Aggregate gradation shall fall within the following limits.
| Sieve Designation |
| Percentages by Weight Passing Square |
Mesh Seives (AASHTO T-27)
| 1 inch |
| 95-100 |
| ¾ inch |
| 90-100 |
| No. 4 |
| 70-80 |
| No. 10 |
| 45-55 |
| No. 40 |
| 21-29 |
| No. 100 |
| 1-9 |
C. Clay shall be pulverized to the extent that 90% will pass the ½ inch sieve and 60% will pass the No. 10 sieve.
D. The aggregate/clay shall be uniformly mixed.
Crushed Aggregate (bid items 10A and 12A) E. Aggregate shall be crushed and have the grading limits as shown on Table 1033.08 of the Standard Specifications for Highway Construction, Nebraska Department of Roads, 1997 English Units Edition:
Table 1033.08
Crushed Rock for Surfacing Gradation Limits
Percent Passing
Sieve Size
Target Value
Tolerance
1 inch
No. 4
+20
No. 10
+15
No. 50
No. 200
+5
F. Chemical additives shall not be used without the CO's written approval.
1.3 rock crossing aggregate
A. Aggregate shall be 3” minus crushed. Fifty percent of the aggregate shall be larger than 2” by weight.
PART 3 – EXECUTION
1.4 GENERAL
A. No surfacing shall be started until all excavation and embankments within the designated roadway is complete, including backfill and compaction to the required subgrade.
B. In no case shall any surfacing material be placed on a frozen, muddy, or unstable subgrade or until the subgrade has been checked and approved by the CO.
1.5 AGGREGATE SURFACING
A. Aggregate surfacing shall be uniformly placed over the entire prepared subgrade and compacted with a minimum of two passes of a steel drum or rubber tired roller.
B. If compaction water is included in this contract apply water as needed to aid in aggregate compaction.
END OF SECTION 02616
02616 - 1
ROADWAY AGGREGATE SURFACING
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