What is Type B asphalt?
The Type B Specification has only a Specification for 50% breakdown at 500 revolutions. This Measure of durability is essential for pavement stability. At Graniterock, our crushed granite is easily type A. Many other indicators of Aggregate and HMA quality are distinguished this way.
What is gyratory compaction?
This Gyratory Compactor, entirely developed and manufactured by Matest, is used to simulate and reproduce the real compaction conditions under actual road paving operations, hence determining the compaction properties of the asphalt. The Compactor comprises a highly rigid steel frame ensuring excellent angle control.
What is Marshall asphalt?
Marshall Asphalt An Asphalt Concrete designed to achieve specified stability, flow, voids and density characteristics. Particle Size Fraction That portion of aggregate which passes one sieve but is retained on the adjacent smaller sized sieve in the sequence of sieves used to specify that grading.
What is D mix asphalt?
Class D. An open-graded HMA. Typically, Class D mixes are placed as 0.70 inch thick wearing courses (essentially, an Open Graded Friction Course for surface applications). Proper maintenance requires a fog seal about every 5 years.
What is the best grade of asphalt?
The 60-70 grade is usually used only in pavements where traffic is very heavy such as principle city streets and very heavily trafficked rural highways. The second grade, 85-100, is by far the most widely used material for plant mixes and is suitable for most pavements.
Where can I get Superpave asphalt concrete mix?
Construct a Superpave Asphalt Concrete pavement with the type of mixture specified in the Contract Documents, or when offered as alternates, as selected. Superpave mixes are identified as Type SP-9.5, Type SP-12.5 or Type SP-19.0. Obtain Superpave Asphalt Concrete from a plant that is currently on the Department’s Production Facility Listing.
What are the different types of asphalt pavement?
Typically agencies consider other types of asphalt-based pavement surfaces such as fog seals, slurry seals and BSTs to be maintenance treatments and are therefore covered in the Maintenance & Rehabilitation section.
What are the components of a Superpave System?
The system consisted of three components: Asphalt binder specification. A system of classifying asphalt binder based on its performance response to temperatures and aging characteristics A design system grounded in traffic loading and environmental conditions Mix design system and analysis tests for performance prediction models
When was the Superpave mix design method introduced?
A new mix design method that accounts for traffic loading and environmental conditions. A new method of asphalt binder evaluation. New methods of mixture analysis. When SHRP was completed in 1993 it introduced these three developments and called them the Superior Performing Asphalt Pavement System (Superpave).