Table_703-2_Base_B_Gradation.pdf
PDF 113 KB Posted
- Attached to
- CURLEW ROCK CRUSHING 2022 Federal contract opportunity
- Solicitation number
- 140L2622Q0051
About this file
This document contains gradation specifications for subbase, base, and surface course aggregates for federal highway construction projects. It provides target value ranges for various aggregate sieve sizes to control particle size distribution. The related federal contract opportunity is a solicitation by the Bureau of Land Management Idaho Region for rock crushing services in Curlew, Idaho in 2022. The solicitation references the gradation specifications but provides no further product or service requirements, pricing terms, response dates or other salient details.
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| File | Type | Posted |
|---|---|---|
| Sol_140L2622Q0051.pdf | ||
| Specifications_and_Work_Statement.docx | DOCX document | |
| Bid_Schedule.xlsx | XLSX spreadsheet | |
| Maps.pdf |
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Text version
Section 703
Table 703-2 Target Value Ranges for Subbase and Base Gradation
Sieve Size Percent by Mass Passing Designated Sieve (AASHTO T 27 and T 11) Grading Designation
A (Subbase) B (Subbase) C (Base) D (Base) E (Base) 2½ inch (63 mm) 100(1)
2 inch (50 mm) 97 – 100(1) 100(1) 100(1)
1½ inch (37.5 mm) 97 – 100(1)
1 inch (25 mm) 65 – 79 (6) 80 – 100 (6) 100(1)
¾ inch (19 mm) 64 – 94 (6) 86 – 100 (6) 100(1)
½ inch (12.5 mm) 45 – 59 (7) inch (9.5 mm) 40 – 69 (6) 51 – 82 (6) 62 – 90 (6)
No. 4 (4.75 mm) 28 – 42 (6) 40 – 60 (8) 31 – 54 (6) 36 – 64 (6) 36 – 74 (6) No. 40 (425 μm) 9 – 17 (4) 12 – 26 (4) 12 – 26 (4) No. 200 (75 μm) 4.0 – 8.0 (3) 4.0 – 12.0 (4) 4.0 – 7.0 (3) 4.0 – 7.0 (3) 4.0 – 7.0 (3)
(1) Statistical procedures do not apply.
( ) The value in the parentheses is the allowable deviation ( ) from the target values.
(c) Surface course aggregate. In addition to Subsection 703.05(a), conform to the following:
(1) Gradation Table 703-3
(2) Liquid limit, AASHTO T 89, Method A 35 max.
(3) Plasticity index, AASHTO T 90 10±3
Do not furnish material that contains asbestos fibers.
Table 703-3 Target Value Ranges for Surface Course Gradations Sieve Size Percent by
Mass Passing Designate Sieve
(AASHTO T 27 & AASHTO T 11)
1 inch (25 mm) 100(1)
½ inch (12.5 mm) 70 – 80 (5)
No. 4 (4.75 mm) 40 – 50 (7) No. 10 (2.0 mm) 25 – 40 (6)
No. 40 (425 μm) 15 – 25 (5)
No. 200 (75 μm) 8.0 – 14.0 (4)
(1) Statistical procedures do not apply.
( ) The value in the parentheses is the allowable deviation ( ) from the target values.
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