There are several national organizations that develop specifications. States, counties and cities usually adopt these specifications but may adapt them with some changes based on the local conditions.
We have experience producing material to meet the following specifications:
- ASTM (American Society for Testing and Materials), made up of users (government engineers) and producers (suppliers)
- AASHTO (American Association of State Highway and Transportation Officials), made up of representatives from 50 states as well as the Federal Highway Administration
State Department of Transportation
Many states will set specification criteria unique to their state conditions. Below are links to state DOT sites to check state specifications:
Corp of Engineers
This gradation table covers a general requirement for riprap erosion aggregate. The gradation or size standard is stated in particle mass as measured by weight. Please contact us for available locations and sizes.
We are a major supplier of railroad ballast in the Upper Midwest. Quality track ballast is made of crushed natural rock – normally granite – traprock or quartzite material. Sizes of the material generally are between 1″ and 2½” top size. Crushed aggregates are specified as they are angular rocks which interlock with each other reducing track bed movement. Soft materials such as limestone are typically not utilized as they tend to break down and degrade under the heavy loads of today’s rail movements.
Gradations are typically referenced by size number. See a standard or typical gradations table.
Contact us today for all of your ballast needs.