|
Acceptable Fill Materials
SC-Series
| Material Location |
Description |
AASHTO
M43
Designation
(1) |
Compaction/
Density
Requirement |
| D |
Fill
material for layer D starts from the top of layer C to the
bottom of flexible pavement or unpaved finish grade above.
Note that pavement sub-base may be part of the D layer. |
Any
soil/rock materials, native soils, or per engineer's plans.
Check plans for pavement subgrade requirements. |
N/A |
Prepare
per engineer's plans. Paved installations may have stringent
material and preparation requirements. |
| C |
Fill
material for layer C starts from the embedment stone (B layer)
to 18" (457 mm) above the top of the chamber. Note that
pavement sub-base may be part of the C layer. |
Granular
well-graded soil/aggregate mixtures, <35% fines. Most pavement
sub-base materials can be used in lieu of this layer. |
3,
357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 |
Begin
compaction after 12" (305 mm)
of material over the chambers is reached. Compact additional
layers in 6" (152 mm) lifts to a minimum 95% standard
proctor density. (2) Roller gross vehicle weight not to exceed
12,000 lbs. (53 kN). Dynamic force not to exceed 20,000 lbs.
(89 kN). |
| B |
Embedment
stone surrounding chambers from the foundation stone to the
C layer above. |
Clean,
crushed, angular stone, nominal size distribution between
3/4" - 2" (19 mm -51 mm) |
3,
357, 4, 467, 5, 56, 57 |
No
compaction required. |
| A |
Foundation
stone below chambers from subgrade up to the foot (bottom)
of the chamber. |
Clean,
crushed, angular stone, nominal size distribution between
3/4" - 2" (19 mm - 51 mm) |
3,
357, 4, 467, 5, 56, 57 |
Plate
compact or roll to achieve a 95% standard proctor density.(2) |
Please note:
1. The listed AASHTO designations are for gradations only. The
stone must also be clean, crushed, angular. For example, a specification
for #4 stone would state: "Clean, crushed, angular No. 4
(AASHTO M43) stone."
2. As an alternative to proctor testing and field density measurements
in the 'A' location, StormTech compaction requirements are met
for 'A' location materials when placed and compacted in 9"
(229) (max) lifts using two full passes with an appropriate compactor.
MC-Series
| Material Location |
Description |
AASHTO
M43
Designation
(1) |
Compaction/
Density
Requirement |
| D |
Fill
material for layer D starts from the top of layer C to the
bottom of flexible pavement or unpaved finish grade above.
Note that pavement sub-base may be part of the D layer. |
Any
soil/rock materials, native soils, or per engineer's plans.
Check plans for pavement subgrade requirements. |
N/A |
Prepare
per engineer's plans. Paved installations may have stringent
material and preparation requirements. |
| C |
Fill
material for layer C starts from the embedment stone (B layer)
to 24" (610 mm) above the top of the chamber. Note that
pavement sub-base may be part of the C layer. |
Granular
well-graded soil/aggregate mixtures, <35% fines. Most pavement
sub-base materials can be used in lieu of this layer. (AASHTO
M145 A-1, A-2, A-3) |
3,
357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 |
Begin
compaction after min 24" (610
mm) of material over the chambers is reached. Compact additional
layers in 12" (305 mm) lifts to a minimum 95% standard
proctor density. (see Tables 2 and 3 of the MC-3500 / MC4500
Construction Guide for maximum roller loads) |
| B |
Embedment
stone surrounding chambers from the foundation stone to the
C layer above. |
Clean,
crushed, angular stone, nominal size distribution 3/4"
- 2" (19 mm -51 mm) |
3,
4 |
No
compaction required. |
| A |
Foundation
stone below chambers from subgrade up to the foot (bottom)
of the chamber. |
Clean,
crushed, angular stone, nominal size distribution 3/4"
- 2" (19 mm - 51 mm) |
3,
4 |
Plate
compact or roll to achieve a 95% standard proctor density.(2) |
Please note:
1. The listed AASHTO designations are for gradations only. The
stone must also be clean, crushed, angular. For example, a specification
for #4 stone would state: "Clean, crushed, angular No. 4
(AASHTO M43) stone."
2. As an alternative to proctor testing and field density measurements
in the 'A' location, StormTech compaction requirements are met
for 'A' location materials when placed and compacted in 9"
(229) (max) lifts using two full passes with an appropriate compactor.
|
