Lab Corner: Float like a butterfly, test expertly

By Mike Anderson, P.E.

I work in a building in a great setting. Beautifully landscaped, overlooking a pond. Our landscaper is really conscientious and works hard at keeping the grounds looking nice.

I learned that we had received recognition as having an area of our grounds that was designated as a “Certified Monarch Butterfly Way Station.”

All parts of that phrase made me smile. (more…)

Are PG 64E binders your father’s PG 76?

Put it to the test

By Greg Harder, P.E.

The year was 1993 and maybe your father worked in the asphalt industry. The Pentium microprocessor was introduced by Intel. Windows NT 3.1 was released by Microsoft. The average cost of gasoline was $1.16 per gallon. A Sony Walkman cost $29.98 and Superpave came out providing us with a new performance-graded (PG) binder specification (currently known as AASHTO M320) that utilized a new test method, AASHTO T315. (more…)