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An example of a Quality Management System that conforms to the requirements of AASHTO R18, Recommended Practice for Establishing and Implementing a Quality Management System for Construction Materials Testing Laboratories, is available for laboratories that are starting from scratch or need some guidance.
Over agitation and improper testing techniques for aggregate can lead to degradation of aggregate samples and improper test results. To many technicians disbelief, ASTM C136 and AASHTO T27 do not specify how long a mechanical shaker’s timer should be set in order to accomplish proper agitation. In order to understand the proper use of mechanical shakers, we must first explain the reasons for using this equipment.
Learn more about the CMEC Accreditation laboratory inspection process, as well as the general criteria your lab will need to meet in order to be eligible for accreditation.