Loading

Building pavements to last in Minneapolis 

High volume asphalt moratorium lifted

By Mark Blow, P.E.

High volume routes constructed with asphalt pavement in the Minneapolis/ St. Paul (MSP) metro area have historically been few and far between.

The fine sand and gravel mixes that used unmodified asphalt binder did not last under the high traffic loads and higher tire pressures. A 2001 Minnesota Department of Transportation (MnDOT) technical memorandum governing the pavement selection and pavement design standards actually prohibited the consideration of asphalt pavement on routes with 20-yr ESALs (equivalent single axle loads) over 10 million. (more…)

Lab Corner – Four simple rules for making my asphalt mixture

By Mike Anderson, P.E. 

Much to the chagrin of family and friends, I am an inveterate rule-follower. I obey all road rules and signs. I never intentionally drive more than 2-3 miles per hour above the posted speed limit.

I take the same approach in my cooking endeavors, always carefully following the recipe to ensure a positive outcome.

Except one fateful time.

(more…)