Aggregate Lab Technician

Instructor

The CIT Program provides the following methods for obtaining certification.

1. Aggregate Lab Course

Course options include:

Online course - course is online and available upon registration. The course is available to you year round with the course period designated in your registration confirmation email and the CanvasPro course page. You must complete the course and subsequent exam(s) by the stated completion date in your confirmation email and in CanvasPro. Written and performance exams are administered in Salina, KS.

In Person course - three day course instructed in Salina, KS and written and performance exams are administered on the last day.

Prerequisite: Pass Basic Math test prior to enrolling for the course and hold a current Aggregate Field certification.

2. Aggregate Lab Exam with IA Witness

This option is for individuals who have been IA witnessed and only need to take the written exam. You must submit the witness form indicating that KT-6, KT-31, KT-55, KT-59 & KT-50 have been witnessed. This form can be submitted upon registering. The written exam is administered online at the student’s location and requires a supervisor or supervisor approved proctor.

3. Aggregate Lab Provisional Online Class & Exam

This option is for newly hired individuals who need this provisional certification to do aggregate lab testing over the summer months. The performance exam will need to be completed within the upcoming training season or within one year, whichever comes first. The performance exam must be completed at K-State Salina. Once the written and performance exams have been completed, the certification will start on the date of the performance exam. The written exam is administered online at the student’s location and requires an approved proctor. This option is not available for recertification.

Course Description

This course is required by the Kansas Department of Transportation for persons testing aggregate for asphalt and concrete mix design to decide on quality and acceptability.

Instructor

Christopher Leibrock - Assistant Bureau Chief Materials - Lab, KDOT Chris has been working at KDOT for 5 years to provide oversight of the central laboratory. He supervises multiple employees including Engineering Technicians, Professional Engineers, and Chemists. He provides oversight and management of the testing program, accreditation program and the testing equipment. He also teaches for the KDOT CIT program by teaching multiple classes on materials and testing for KDOT. He provides extensive oversight of materials approval and prequalification programs within KDOT, specifically, approvals of aggregate sources including the oversight of testing and specifications. In addition, volunteers as a national representative for KDOT on the AASHTO Committee of Materials and Pavements as a vice chair of technical committee TS-4e and voting member of multiple other technical committees. He is also a voting member for KDOT on the National Transportation Product Evaluation Program.

Workbook

Download the Aggregate Laboratory Workbook

Learning Objectives

• Test for specific gravity and absorption of fine and coarse aggregate
• Use sand equivalency test to determine plastic fines in graded aggregates
• Examine the percentage of fractured particles in coarse aggregate
• Test for flat or elongated particles in coarse aggregate

Performance Checklists

KT-06 Specific Gravity and Absorption of Aggregates (Coarse)
KT-06 Specific Gravity and Absorption of Aggregates (Fine)
KT-31 Determination of Percentage of Crushed Particles in Crushed Gravel
KT-55 Plastic Fines in Combined Aggregates by Use of the Sand Equivalent Test
KT-59 Flat and Elongated Particles in Coarse Material Test

Testing Information

• Exam: The class requires a written exam and a performance exam. The exam with IA witness option includes a written exam.
• Score: A score of 60% on each portion of the written exam plus a 70% overall score is required to pass the exam. Failure on any part of the written exam requires a full retest. If three or less performance sub tests are failed, only the sub test failed must be retaken. If four or more sub tests are failed, all performance sub tests must be retaken.