Amendment_One.docx
DOCX document 24 KB Posted
- Attached to
- BIG DRAW PIT CRUSH AND STOCKPILE Federal contract opportunity
- Solicitation number
- 12-94TZ-18-B-0001
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AMENDMENT ONE
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AMENDMENT ONE
SOL. NO. 1294TZ18B0001
The below documents are attached and incorporated into the solicitation and added to the Statement of Work:
The attached Section 703 – Aggregate Supplemental Specification
Table of Contents
| Preface | 2 |
| 703 - Aggregate | 3 |
| 703.05 Subbase, Base, Surface Course, and Screened Aggregate. | 3 |
Preface Preface_wo_04_05_2018
Delete all but the first paragraph and add the following:
The Forest Service, US Department of Agriculture has adopted FP-14 for construction of National Forest System Roads.
703 - Aggregate 703.05_National_12_15_2016 Delete 703.05 and replace with the following:
703.05 Subbase, Base, Surface Course, and Screened Aggregate.
(a) Subbase or base aggregate. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming the following:
| (1) Gradation | Table 703-2 |
| (2) Liquid limit, AASHTO T 89 | 25 max. |
| (3) Plastic limit, AASHTO T 90 | Nonplastic |
| (4) Los Angeles abrasion, AASHTO T 96 | 40% max. |
| (5) Sodium sulfate soundness loss (5 cycles), | 12% max. |
AASHTO T 104
| (6) Durability index (coarse), AASHTO T 210 | 35 min. |
| (7) Durability index (fine), AASHTO T 210 | 35 min. |
| (8) Fractured faces, ASTM D 5821 | 50% min. |
(9) Free from organic matter and lumps or balls of clay
Do not use material that breaks up when alternately frozen and thawed or wetted and dried.
Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, shall consist of natural or crushed sand and fine mineral particles.
(b) Surface course aggregate. Furnish hard, durable particles or fragments of crushed stone, crushed slag, or crushed gravel conforming the following:
| (1) Gradation | Table 703-3 |
| (2) Liquid limit, AASHTO T 89 | 35 max. |
(3) Plastic Index, AASHTO T 90
| a) If the percent passing the No. 200 sieve is less than 12% | 2 to 9 | ||
| b) If the percent passing the No. 200 sieve is greater than 12% | Less than 2 | ||
| (4) Los Angeles abrasion, AASHTO T 96 | 40% max. | ||
| (5) Sodium sulfate soundness loss (5 cycles), | 12% max. |
AASHTO T 104
| (6) Durability index (coarse), AASHTO T 210 | 35 min. |
| (7) Durability index (fine), AASHTO T 210 | 35 min. |
| (8) Fractured faces, ASTM D 5821 | 75% min. |
(9) Free from organic matter and lumps or balls of clay
Do not use material that breaks up when alternately frozen and thawed or wetted and dried.
Do not furnish material that contains asbestos fibers.
Obtain the aggregate gradation by crushing, screening, and blending processes as necessary. Fine aggregate, material passing the No. 4 sieve, shall consist of natural or crushed sand and fine mineral particles.
(c) Screened aggregate – Furnish hard, durable particles or fragments of stone, slag, or gravel conforming the following:
| (1) Gradation | Table 703-16 | |||
| (2) Plastic Index, AASHTO T 90 | Less than 9 | |||
| (3) Los Angeles abrasion, AASHTO T 96 | 55% max. |
(4) Free from organic matter and lumps or balls of clay.
Do not use material that breaks up when alternately frozen and thawed or wetted and dried.
Obtain the aggregate gradation by crushing, screening, and blending processes as necessary.
Delete Table 703-2 and replace with the following:
Table 703-2 Target Value Ranges for Subbase and Base Gradation
| Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11) |
| Grading Designation |
| E (Base) |
| 62 – 90 (6) |
| 36 – 74 (6) |
| 12 – 26 (4) |
| 4.0 – 7.0 (3) |
( ) The value in the parentheses is the allowable deviation () from the target values..
D (Base)
| 100 |
| 86 – 100 (6) |
| 51 – 82 (6) |
| 36 – 64 (6) |
| 12 – 26 (4) |
| 4.0 – 7.0 (3) |
C (Base)
| 80 – 100 (6) |
| 64 – 94 (6) |
| 40 – 69 (6) |
| 31 – 54 (6) |
4.0 –7.0 (3)
B (Subbase)
| 100 |
| 97 – 100 |
40 – 60 (8)
4.0 – 12.0 (4)
| A (Subbase) |
| 100 |
| 97 – 100 |
65 – 79 (6)
45 – 59 (7)
| 28 – 42 (6) |
| 9 – 17 (4) |
| 4.0 – 8.0 (3) |
| Sieve Size |
| 2½ inch |
| 2 inch |
| 1½ inch |
| 1 inch |
| 3/4 inch |
| 1/2 inch |
| 3/8 inch |
| No. 4 |
| No. 40 |
| No. 200 |
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)
| 43 – 60 (7) |
| 30 – 46 (6) |
| 16 – 28 (5) |
| 8.0 – 15.0 (4) |
| S |
| 100 |
| 72 – 92 (6) |
| 51 – 71 (6) |
| 36 – 53 (7) |
| 26 – 40 (6) |
| 14 – 25 (5) |
| 8.0 – 15.0 (4) |
H
97 - 100
| 80 – 92 (6) |
| 58 – 70 (7) |
| 28 – 40 (6) |
| 16 – 26 (5) |
| 9.0 – 14.0 (4) |
G
| 100 |
| 97 - 100 |
| 70 – 80 (6) |
| 51 – 63 (7) |
| 28 – 39 (6) |
| 19 – 27 (5) |
| 10.0 – 16.0 (4) |
| F |
| 100 |
| 97-100 |
| 76-89 (6) |
| 56-68 (6) |
| 43-53 (7) |
| 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 703-16 Gradation Requirements for Screened Aggregate
| Sieve Size |
| Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11) |
Grading Designation
| L |
| M |
| N |
| O |
| P |
| Q |
| R |
| 6 inch |
| 100 |
| 100 |
4 inch
| 100 |
| 100 |
3 inch
| 100 |
| 100 |
2 inch
No. 4
15-45
15-45
15-45
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