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Construction Program Management and Inspection Guide
Appendix B (Part 3 continued)
4.0 Materials Control
The types, sources, properties, and procedures for storing of materials to be used for each Earthwork category are as indicated below.
4.1 - Material Types and Source(s) of Supply
Earthwork material will be classified according to the following Earthwork Item categories:
- Backfill Material for Muck Excavation
- Roadway Embankment Material
- Embankment Material under Bridge Foundations
- Backfill Material for Structures
- Backfill Material for Pipes
4.1.1 - Backfill Material for Muck Excavation
The types and potential sources of material currently identified for use as Backfill Material for Muck Excavation are listed in the table below.
| Material Type | Material Source |
|---|---|
| Rock Excavate |
|
| Special Borrow |
|
ABC Contractors will submit updated information on the types and sources of Backfill Material for Muck Excavation as part of the "Weekly Schedule of Earthwork Materials Production Operations" as outlined under Section 6.1 below.
4.1.2 - Roadway Embankment Material
The types and sources of material currently identified for use as Roadway Embankment are listed in the table below. At this time, sufficient quantities of Earth Excavate, Rock Excavate, Ordinary Borrow, and Gravel Borrow appear to be available On-Site for Roadway Embankment construction. If Off-Site sources of these materials are determined necessary by ABC Contractors, the table will be updated to reflect these sources.
| Material Type | Material Source |
|---|---|
| Rock Excavate |
|
| Earth Excavate |
|
| Ordinary Borrow |
|
| Gravel Borrow |
|
| Special Borrow |
|
ABC Contractors will submit updated information on the types and sources of Roadway Embankment Material as part of the "Weekly Schedule of Earthwork Materials Production Operations" as outlined under Section 6.1 below.
4.1.3 - Embankment Material Under Bridge Foundations
The types and potential sources of material currently identified for use as Embankment Material under Bridge Foundations are listed in the table below.
| Material Type | Material Source |
|---|---|
| Gravel Borrow |
|
| Crushed Stone |
|
ABC Contractors will submit updated information on the types and sources of Embankment Material under Bridge Foundations as part of the "Weekly Schedule of Earthwork Materials Production Operations" as outlined under Section 6.1 below.
4.1.4 - Backfill Material for Structures
The types and potential sources of material currently identified for use as Backfill Material for Structures are listed in the table below.
| Material Type | Material Source |
|---|---|
| Gravel Borrow |
|
ABC Contractors will submit updated information on the types and sources of Backfill Material for Structures as part of the "Weekly Schedule of Earthwork Materials Production Operations" as outlined under Section 6.1 below.
4.1.5 - Backfill Material for Pipes
The types and potential sources of material currently identified for use as Backfill Material for Pipes are listed in the table below.
| Material Type | Material Source |
|---|---|
| Ordinary Borrow |
|
| Gravel Borrow |
|
ABC Contractors will submit updated information on the types and sources of Backfill Material for Pipes as part of the "Weekly Schedule of Earthwork Materials Production Operations" as outlined under Section 6.1 below.
4.2 - Material Properties
Earthwork material Source Characterization and Mix Designs will be performed as described below.
4.2.1 - Material Source Characterization Sampling and Testing
Earthwork materials will be fully characterized by ABC Contractors prior to their use in the intended location. Grids will be established and maintained at each Earthwork source location identifying "Quadrants." Each Quadrant will be numbered for Source Characterization identification (e.g. SC-1, SC-2, SC-99, etc.). ABC Contractors will submit the results of Source Characterization testing for each Source Quadrant of Earthwork material to Transportation Agency a minimum of two (2) calendar days prior to placement of any material from the Source Quadrant. The following table identifies the specific Source Characterization testing that will be performed on all Earthwork materials.
| Material Type | Characteristic Tested | Test Method | Test Frequency |
|---|---|---|---|
| Rock Excavate | Maximum Size (<1m) | Visual/Tape | Minimum 4/Day/Quadrant |
| Earth Excavate M1.01.0 Modified) (Contains Boulders <600 mm) | Soil Classification | AASHTO M145 | Minimum 4/Quadrant |
| Liquid Limit | AASHTO T89 | Minimum 4/Quadrant | |
| Plastic Limit /PL | AASHTO T90 | Minimum 4/Quadrant | |
| Maximum Dry Density (Method D) | AASHTO T180 | Minimum 4/Quadrant | |
| Optimum Moisture Content | AASHTO T180 (Method D) | Minimum 4/Quadrant | |
| Course Particles Correction | AASHTO T224 | Minimum 4/Quadrant | |
| Grain-Size Analysis | AASHTO T311 | Minimum 4/Quadrant | |
| Ordinary Borrow (m1.01.0) | Soil Classification | AASHTO M145 | Minimum 4/Quadrant |
| Liquid Limit | AASHTO T89 | Minimum 4/Quadrant | |
| Plastic Limit /PL | AASHTO T90 | Minimum 4/Quadrant | |
| Maximum Dry Density | AASHTO T99 (Method C) | Minimum 4/Quadrant | |
| Optimum Moisture Content | AASHTO T99 (Method C) | Minimum 4/Quadrant | |
| Course Particles Correction | AASHTO T224 | Minimum 4/Quadrant | |
| Grain-Size Analysis | AASHTO T311 | Minimum 4/Quadrant | |
| Gravel Borrow (M1.03.0) | Soil Classification | AASHTO M145 | Minimum 4/Quadrant |
| Gradation | AASHTO T11, T27 | Minimum 4/Quadrant | |
| Maximum Dry Density | AASHTO T180 (Method D) | Minimum 4/Quadrant | |
| Optimum Moisture Content | AASHTO T180 (Method D) | Minimum 4/Quadrant | |
| Special Borrow (m1.02.0) | Soil Classification | AASHTO M145 | Minimum 4/Quadrant |
| Gradation | AASHTO T11, T27 | Minimum 4/Quadrant | |
| Plastic Limit /PL | AASHTO T90 | Minimum 4/Quadrant | |
| Maximum Dry Density | AASHTO T180 (Method D) | Minimum 4/Quadrant | |
| Optimum Moisture Content | AASHTO T180 (Method D) | Minimum 4/Quadrant | |
| Maximum Percentage of Wear (LA Abrasion) | AASHTO T96 | Minimum 4/Quadrant | |
| Crushed Stone (m2.01.0) | Soil Classification | AASHTO M145 | Minimum 1/10.000 m3 |
| Gradation | AASHTO T11, T27 | Minimum 1/10.000 m3 | |
| Maximum Percentage of Wear (LA Abrasion) | AASHTO T96 | Minimum 1/10.000 m3 | |
| Flat and Elongated Particles | ASTM D4791 | Minimum 1/10.000 m3 |
All Earthwork Source Characterization samples will be obtained randomly in accordance with ASTM D3665. The random sample locations within each Source Quadrant will be determined by Station, Offset, and Elevation within the Quadrant. All random sample locations will be documented on NETTCP Standard Test Report Form D3665 or D3665RNG. A copy of these Random Sampling Forms is located in Appendix __ (see Note in "A Model Quality Control Plan").
All Earthwork Source samples will be obtained following AASHTO T2 and split in accordance with AASHTO T248.
All Source Characterization sampling and testing results will be documented on the following Standard Test Report Forms (TRFs):
| Form No. | Form Title |
|---|---|
| M145-T89-T90 | Classification of Soils (Includes Liquid Limit and Plastic Limit) |
| NETTCP T27 | Sieve Analysis Test Report |
| NETTCP T96 | Resistance to Degradation of Aggregate by Abrasion Test Report |
| T99 | Moisture-Density Relations of Soil (Standard) |
| T180 | Moisture-Density Relations of Soil (Modified) |
| T311 | Grain-Size Analysis of Granular Soil Materials |
| Rock Size | Evaluation of Maximum Rock Size in Earthwork Materials |
A copy of the standard TRFs used for Source Characterization sampling and testing is located in Appendix __ (see Note in "A Model Quality Control Plan").
4.2.2 - Mix Designs
Earthwork Materials "Mix Designs" are generally not required. Source Characterization testing will determine whether specific Earthwork Materials sources meet the specification requirements for a particular material type required (i.e. Ordinary Borrow, Gravel Borrow, Special Borrow, etc.).
4.3 - Processing of Existing Materials
Where On-Site excavate proposed to be used for Earthwork is found to not meet specification requirements, the following procedures will be used to process or blend the material to meet the requirements of a specific Earthwork Material Type:
- A blended material "Mix Design" will be developed by the Project Laboratory.
- A stockpile of the excavate, not to exceed one day's production, will be blended with other material per the "Mix Design."
- At the completion of blending of the stockpile, samples will be obtained and Source Characterization testing will be performed to confirm that the blended material meets the specification requirements.
4.4 - Material Storage and Stockpiling
All Earthwork materials will be properly stored and maintained to prevent contamination or commingling of different materials. Storage and stockpiling procedures will be as follows:
- The limits of each storage or stockpile location will be clearly marked by grade stakes legibly marked indicating the corresponding Source Characterization sample number (i.e. SC-1, SC-2, etc.) contained in the Project "Soils Source Characterization Log."
- All active/working stockpiles of Earthwork materials will be characterized in accordance with Section 4.2.1 above a minimum of once per week.
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