Understanding a Job Mix Formula Submittal Workshop - Oahu 09/16/25

Please join us on March 11th for our FREE Understanding a JMF Submittal workshop. The workshop will be conducted in person at the HAPI office. Attendees will have a chance to win a $10 Starbucks gift card(s).The job mix formula (JMF) is the recommended mixture, which includes aggregate gradation and asphalt binder type, to meet the project specifications. The JMF submittal is prepared by the paving contractor for any project that requires the construction of an asphalt pavement. The submittal is typically reviewed by the engineer of record.This two-hour workshop will discuss 1) the basics of asphalt pavement mixes, by discussion the Marshall method, which is the most widely used in Hawaii, 2) the production of asphalt pavements, and 3) how the JMF submittal relates to the project specification, using the Department of Transportation, 2005 Standard Specifications as an example.Takeaways:- A basic understanding of asphalt pavement mixes– A basic understanding of how asphalt pavements are produced– An understanding of how to review the JMF submittal for conformance to a specificationComments from attendees:- The presentation really broke down what to look for in a job mix formula submittal. It explained how to check if the mix meets specifications. Overall, a great informative workshop.- The presentation was comprehensive and professionally given. It was 2 hours full of information and very interesting.- What I remember most from the workshop are as follows: Gradation (JMF Aggregate Percentage Breakdown and Sieve Analysis calculation), Volumetric Relationships, and Nominal and Maximum Aggregate Sizes.

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