Agencies
Services
Andrew Stolba
Chief Geologist
Office of Highways Project Implementation
Bureau of Materials
Aggregate
Various tests, including quality, freeze-thaw, and alkali-silica reactivity (ASR) are performed on aggregates used for road and bridge construction in Illinois. These tests quantify the physical characteristics of each aggregate product from each source. Development and evaluation of all statewide aggregate related policies, procedures and specifications are continually modified to keep them current with new technologies and test procedures. Aggregates focus on: natural sands, gravels, crushed gravels, crushed stone, steel slag, air cooled blast furnace (ACBF) slag, recycled crushed concrete, rip rap, and reclaimed asphalt pavement (RAP) used as aggregate.
Below you will find information regarding the process and how to get materials approved.
Policy Memorandums
Clicking a link below will take you directly to the policy memorandum with specific information explaining the process to become a producer/supplier for the material listed in the title.
- Complete List of Policy Memorandums
- Aggregate Freeze-Thaw Sampling and Testing
- Aggregate Gradation Control System (AGCS)
- Construction and Demolition Debris Sand as a Fine Aggregate for Trench Backfill
- Crushed Gravel Producer Self-Testing Program
- Crushed Slag Producer Certification and Self-Testing Program
- Designation of Aggregate Information on Shipping Tickets
- Fine and Coarse Aggregates Used as Select Fill in MSE Walls Acceptance Procedures for Approved/Qualified Aggregate Sources
- Inspection of Large Sized Aggregate and Rip Rap used for Erosion Protection, Sediment Control, Rockfill, and Aggregate Subgrade Improvement
- Minimum Private Laboratory Requirements for Construction Materials Testing or Mix Design
- Reclaimed Asphalt Pavement (RAP) for Aggregate Applications
- Recycling Portland Cement Concrete Into Aggregate
- Slag Producer Self-Testing Program
- Use of Non-Certified Aggregate Stockpiles Under the AGCS
Laboratory/Field Test Procedures
There are currently no laboratory or field test procedures on the internet.
Clicking a link below will take you directly to the form listed in the title. These forms are provided as tools to ensure that the correct data is supplied to IDOT when submitting samples.
- Aggregate Producer Certification Letter BMPR AGG06
- Aggregate Shipping Tickets Form for Producers BMPR AGG01
- Aggregate Shipping Tickets Form for Suppliers and Terminals BMPR AGG02
- Aglime Submittal Form CBM AGG03
- Application for Aggregate Gradation Technician Course BMPR AGG04
- Field/Lab Gradations BMPR MI504
- Witness Verification of Aggregate Gradation Technician Course BMPR AGG05
Guides/Spreadsheets
The following documents are provided as a tool to assist with identifying materials and/or ensuring that correct data is supplied to IDOT.
Material Specific Information
There is currently no material specific information
Specifications
Manuals
- Gradation Technician
- Manual for Materials Inspection
- Manual of Aggregate Quality Test Procedures
- Manual of Test Procedures for Materials (revised 12/1/22)
- Manual of Test Procedures for Materials 2023 (revised 12/1/23)
- Manual of Test Procedures for Materials 2024 (revised 12/1/24)
- Manual of Test Procedures for Materials 2025 (revised 12/1/25)
- Illinois Modified AASHTO T 26 (Effective 4/22/25)
Required technician training for Mixture Aggregate Technician and Aggregate Technician is described on the Lake Land College website.
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