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Road Maintenance
Forest Service Supplemental Specifications (FSSS) to FP-14
Apache-Sitgreaves National Forests
Table of Contents
| 703 - Aggregate | 3 |
| 703.05 Subbase, Base, Surface Course, and Screened Aggregate. | 3 |
703 - Aggregate 703.05_National_3_15_2022 Delete 703.05 and replace with the following:
703.05 Subbase, Base, and Surface Course Aggregate.
(a) General. Provide hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming to the following:
(1) Los Angeles abrasion, AASHTO T 96 35 percent maximum
(2) Soundness of aggregate using sodium sulfate AASHTO T 104, 5 cycles
| (a) Coarse aggregate | 12 percent loss maximum |
| (b) Fine aggregate | 12 percent loss maximum |
| (3) Durability index (coarse), AASHTO T 210 | 35 minimum |
| (4) Durability index (fine), AASHTO T 210 | 35 minimum |
| (5) Fractured faces, AASHTO T 335 (one or more) | 70 percent minimum |
(6) Without organic matter and lumps or balls of clay.
(b) Subbase or base course aggregate. In addition to Subsection 703.05(a), conform to the following:
| (1) Gradation | Table 703-1 |
| (2) Liquid limit, AASHTO R 58 and AASHTO T 89 | 25 maximum |
Table 703-1 Target Value Ranges for Subbase, Base, and Surface Course Gradation
| Sieve size |
| Percent by Mass Passing Designated Sieve (AASHTO T 27 & T 11) |
Grading Designation(1)
| 2 in |
| 97 to 100 |
| 100 |
| 100 |
| – |
| – |
| – |
| – |
| – |
| 1½ in |
| – |
| 97 to 100 |
| – |
| – |
| – |
| – |
| – |
| – |
| 1 in |
| 65 to 79 |
| – |
| 80 to 100 |
| 100 |
| 100 |
| – |
| 100 |
| – |
| ¾ in |
| – |
| – |
| 64 to 94 |
| 86 to 100 |
| 86 to 100 |
| 100 |
| – |
| 100 |
| ½ in |
| 45 to 59 |
| – |
| – |
| – |
| – |
| – |
| 70 to 80 |
| – |
| ⅜ in |
| – |
| – |
| 40 to 69 |
| 51 to 82 |
| 51 to 82 |
| 62 to 90 |
| – |
| – |
| No. 4 |
| 28 to 42 |
| 40 to 60 |
| 31 to 54 |
| 36 to 64 |
| 36 to 64 |
| 36 to 74 |
| 40 to 50 |
| 41 to 71 |
| No. 10 |
| – |
| – |
| – |
| – |
| – |
| – |
| 25 to 40 |
| – |
| No. 40 |
| 9 to 17 |
| – |
| – |
| 12 to 26 |
| 12 to 26 |
| 12 to 26 |
| 15 to 25 |
| 12 to 28 |
| No. 200 |
| 4.0 to 8.0 |
| 4.0 to 12.0 |
| 4.0 to 7.0 |
| 4.0 to 7.0 |
| 10 max(2) |
| 4.0 to 7.0 |
| 8.0 to 14.0 |
| 9.0 to 16.0 |
(1) Contractor specified target values. See Table 703-2 for allowable deviations.
(2) Statistical procedures do not apply.
(c) Surface course aggregate. In addition to Subsection 703.05(a), conform to the following:
| (1) Gradation | Table 703-1 |
| (2) Liquid limit, AASHTO R 58 and T 89, Method A | 35 maximum |
(3) Plasticity index, AASHTO T 90
| (a) Grading G | 10±3 |
| (b) Grading H | 8±4 |
Table 703-2 Allowable Deviation Based on Target Value for Aggregates
| Percent by Mass Passing |
| Allowable |
Deviation
(1) Statistical procedures do not apply.
Delete Table 703-2 and replace with the following:
Target Value Ranges for Subbase, Base, and Surface Course Gradation
| Sieve size |
| Percent by Mass Passing Designated Sieve (AASHTO T 27 & T 11) |
Grading Designation(1)
| 2 in |
| 97 to 100 |
| 100 |
| 100 |
| – |
| – |
| – |
| – |
| – |
| 1½ in |
| – |
| 97 to 100 |
| – |
| – |
| – |
| – |
| – |
| – |
| 1 in |
| 65 to 79 |
| – |
| 80 to 100 |
| 100 |
| 100 |
| – |
| 100 |
| – |
| ¾ in |
| – |
| – |
| 64 to 94 |
| 86 to 100 |
| 86 to 100 |
| 100 |
| – |
| 100 |
| ½ in |
| 45 to 59 |
| – |
| – |
| – |
| – |
| – |
| 70 to 80 |
| – |
| ⅜ in |
| – |
| – |
| 40 to 69 |
| 51 to 82 |
| 51 to 82 |
| 62 to 90 |
| – |
| – |
| No. 4 |
| 28 to 42 |
| 40 to 60 |
| 31 to 54 |
| 36 to 64 |
| 36 to 64 |
| 36 to 74 |
| 40 to 50 |
| 41 to 71 |
| No. 10 |
| – |
| – |
| – |
| – |
| – |
| – |
| 25 to 40 |
| – |
| No. 40 |
| 9 to 17 |
| – |
| – |
| 12 to 26 |
| 12 to 26 |
| 12 to 26 |
| 15 to 25 |
| 12 to 28 |
| No. 200 |
| 4.0 to 8.0 |
| 4.0 to 12.0 |
| 4.0 to 7.0 |
| 4.0 to 7.0 |
| 10 max(2) |
| 4.0 to 7.0 |
| 8.0 to 14.0 |
| 9.0 to 16.0 |
(1) Contractor specified target values. See Table 703-2 for allowable deviations.
(2) Statistical procedures do not apply.
Delete Table 703-3 and replace with the following:
Table 703-3 Target Value Ranges for Surface Gradation
| Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11) |
| Grading Designation |
| U |
| 71 – 90 (6) |
| 50 – 68 (7) |
| 34 – 51 (6) |
| 19 – 30 (5) |
| 8.0 – 15.0 (4) |
( ) The value in the parentheses is the allowable deviation () from the target values.
If the plasticity index (PI) is greater than 0, the TV range for the No. 200 sieve size is 8-12 (4).
T
71 – 91 (6)
| 16 – 28 (5) |
| 8.0 – 15.0 (4) |
| 51 – 71 (6) |
| 36 – 53 (7) |
| 26 – 40 (6) |
| 14 – 25 (5) |
| 8.0 – 15.0 (4) |
H
97 - 100
| 28 – 40 (6) |
| 16 – 26 (5) |
| 9.0 – 14.0 (4) |
G
| 28 – 39 (6) |
| 19 – 27 (5) |
| 10.0 – 16.0 (4) |
| 23-32 (6) |
| 15-23 (5) |
| 10.0-16.0 (4) |
| Sieve Size |
| 1 1/2 inch |
| 1 inch |
| 3/4 inch |
| 1/2 inch |
| 3/8 inch |
| No. 4 |
| No. 8 |
| No. 16 |
| No. 40 |
| No. 200 |
Add Table 703-13:
Table 703-13 Gradation Requirements for Screened Aggregate
| Sieve Size |
| Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11) |
Grading Designation
4 inch
3 inch
2 inch
No. 4
15-45
15-45
15-45 image1.gif
