What is PG grade binder?
The Performance Graded (PG) system is a method of measuring asphalt binder performance. It was originally developed during the Strategic Highway Research Program (SHRP) in the early 1990s. In 2005, California agreed to adopt the PG system for grading asphalts in the state.
What is performance grade asphalt binder?
The Performance Grade (PG) system is the method of categorizing an asphalt cement binder. used in asphalt pavement relative to its rated performance at different temperatures. It was. originally developed during the Strategic Highway Research Program (SHRP) in the early. 1990’s and was called “SuperPave.
What is a PG grade?
California specifies PG grades for unmodified binder. The common grades used in California are PG 58-22, PG 64-10, PG 64-16, PG 64-28, and PG 70-10. California expects to specify PG grades for modified binder (PG Modified) in the near future. The expected grades for PG Modified are PG 58-34M, PG 64-28M, and PG 76-22M.
What is PG in pavement?
Performance Grade (PG) Bitumen Nomenclature Performance Grade (PG) bitumen cement based on two factors: traffic and pavement temperature. Adjustments are made to the PG grade of asphalt cement based on traffic conditions and traffic volumes which are intended to enhance the design life of the pavement.
How do I choose an asphalt binder?
- Under the Superpave binder grading system, the choice of an asphalt grade is based on the lowest 1-day and highest 7-day average pavement temperature expected at the site.
- This plot shows that there is a 1.7% + 0.5% + 0.1% = 2.3% chance that the 7-day-average pavement temperature will exceed 64oC in any given year.
What are the different grades of asphalt?
There are three different grades available in asphalt. The grades available are I-2, also known as base; I-5, known as top ;and the I-4 or commercial top grades. The difference in the tree grades are that the I-2 or base consists of ¾ inches of stone. The base grade is generally used in corn stabilizing level.
What is the high and low temperature grade for a PG 64-22?
An example of a PG binder grade is PG64-22. The binder should resist rutting to a pavement temperature of 64°C and cracking to a pavement temperature of -22°C.
How long does it take to get a PG grade?
How long does it take to get the scouting report and PG grade after the showcase? The report and PG Grade as well as video will be added to the players profile page around 4 weeks from the end of the event. Who to contact if you need further help with showcases?
What is PG grading in asphalt?
The main purpose of classifying and selecting asphalt binders using the PG system is to make certain that the binder has the correct properties for a given environment. PG grading uses various measurements of the binder’s flow properties to establish its grade, which is expressed as two numbers.
What does PG mean in binder?
Performance Graded (PG) Binder The Performance Graded (PG) system is a method of measuring asphalt binder performance. It was originally developed during the Strategic Highway Research Program (SHRP) in the early 1990s. In 2005, California agreed to adopt the PG system for grading asphalts in the state.
What are the different binder grades?
Binder grades are at 6-degree increments •PG 58-28 is the first available grade to meet 50% Reliability •PG 64-34 is the first available grade to meet a reasonable design grade -40 -30 -20 -10 0 10 20 30 40 50 60 70
What is the difference between Superpave AC and PG binders?
The Superpave binder specifications are performance-based; therefore, these binders are known as performance-graded (PG) binders in contrast to the older system of viscosity graded (AC) binders, which are typically used for surface treatments and aggregate precoating (see Item 300).