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Bituminous Chemistry

Bituminous Chemistry.JPGBituminous Chemistry ensures that quality materials are used in highway projects by maintaining a system of sampling, testing, documentation, and reporting of test results for focus areas including: performance graded (PG) asphalt binders, asphalt emulsions, cutback asphalts, and various asphaltic products. Bituminous chemistry also maintains the American Association of State Highway and Transportation Officials (AASHTO) accreditation for PG asphalt binders and emulsified asphalts and manages certification policies and approved lists for PG asphalt binders, asphalt emulsions, and cutback asphalts. Refer to Part II Material Group Details of the Manual for Materials Inspection to determine material requirements.


Below you will find information regarding the process and how to get materials approved.

Policy Memorandums

Clicking a hot 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.

Laboratory/Field Test Procedures

Clicking a hot link below will take you directly to the test procedure listed in the title. In order for these materials to be approved/qualified they will be tested to the requirements listed in the procedure.


Clicking a hot 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.


Below are reference materials to assist in getting materials approved and IDOT guidelines.


There are currently no guides.

Material Specific Information

There is currently no material specific information


CBM Specifications

Activities involving materials, research, and new products are administered by IDOT's Central Bureau of Materials (CBM). Administration of these activities requires CBM to develop new specifications or revise existing department specifications. Since these activities are under development or are being evaluated, the specifications do not have a wide distribution. In addition, these specifications are a working document and have not been adopted as a statewide standard.



There is no required training.

Contact Us

William (Clay) Snyder
(217) 782-7217
Bituminous Chemistry Laboratory Supervisor
Bureau of Materials 
Office of Highways Project Implementation

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