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HMA Level 2 Job Mix Technician
The Hot Mix Asphalt (HMA) Level 2 Job Mix Technician course is intended to cover the concepts and preparation procedures of HMA job mix formula (JMF). Individuals who complete this course will be certified to perform HMA Level 2 Job Mix Technician duties for SCDOT projects. Each participant is responsible for performing mathematical calculations related to the JMFs. The instructors for the course are made up of knowledgeable asphalt industry consultants, academia, contractors and SCDOT representatives.
To become certified, participants are required to attend a two-and-a-half (2 ½) day course, pass a written exam (open book and open notes) with a score of 80% or higher, perform a full JMF preparation in the presence of the SCDOT Asphalt Materials Unit personnel at OMR in Columbia, and submit proof of enrollment in the AASHTO AMRL Proficiency Sample Program. Topics covered include:
- Asphalt Binder
- SCDOT Mix Design Procedures and Related Calculations
- Aggregate blending
- Preparing aggregate samples
- Mixing and compacting laboratory HMA samples
- Maximum specific gravity (MSG)
- Bulk specific gravity (BSG
- Calculating volumetric properties
- % air voids
- % VMA
- % VFA
- Optimum % asphalt binder content
- ITS testing
- Stability testing
- Rut-resistance testing
- SCDOT Specifications
Entry Requirements/What to Expect
- Current HMA Level 1 QC Technician certification
- Experience form signed by a certified HMA Level 3 QC Manager or a certified HMA Level 2 Job Mix Technician confirming 6 months of related asphalt lab experience, preferably in HMA job mix preparation
On a yearly basis, to maintain certification and to continue to be able to submit JMFs to SCDOT, each HMA Level 2 Job Mix Technician must submit the results of his/her annual AMRL proficiency samples to Myrtle Mraovich at Tri-County Technical College via fax at 864-646-1894. See the SCDOT Technician Certification Policy for more details.
To become re-certified, the participant must attend a two (2) day course and pass a written exam with a score of 80% or higher. The re-certification course will contain a general overview, a review of all specification changes, and any procedural changes that may have occurred.
Frequency of Re-certification
The certification period is five years. An individual will be informed, by way of a letter mailed to the technician's last address of record, when the certification period is nearing the expiration date. If the technician was last registered for certification by his/her employer, the last address of record may be the employer's address. However, it is the responsibility of the individual to keep Tri-County Technical College and the Technician Certification Board advised of his/her current address. The individual is also responsible for registering for the re-certification course, attending the re-certification course, and passing the written exam with a score of 80% or higher.
For more information, call (864) 646-1700 or toll free 866-269-5677, Ext 1700
(within the 864 area code) or e-mail firstname.lastname@example.org
For additional class offerings, visit our full course listing and schedule of classes.