City of Colorado Springs / Streets / Pavement Rehabilitation/Resurfacing / Tire Rubber Asphalt / Slag and Granite Examples

Slag and Granite Examples

Slag is a bi-product of the steel making process.  The material being tested in the TBTRA paving program by the City of Colorado Springs is 100% recycled.  It is a reasonably priced, slightly-rounded, extremely-hard aggregate.  The steel slag is produced in Pueblo, CO and comes from Rocky Mountain Steel Mill's Electric Arc Furnace.  It is then processed and screened to meet City gradation specs by a separate company.  Slag is being tested in both the City's TBTRA and chip seal programs for durability, constructability, and compatibility with the asphalt and chip seal oils.

 

 

 

 

 

Granite is an angular rock native to Colorado that varies in its color, level of hardness and durability based on the pit where it originates.  Aggregate is the principal component of asphalt (by volume) and is critical to the ultimate durability of the road surface.  The City of Colorado Springs has utilized aggregate from several different sources throughout the front-range in its paving programs over the years.