Abstract
Abstract The American Association of State Highway and Transportation Officials (AASHTO) approved the establishment of the AASHTO Accreditation Program (AAP) in February 1988 and the first laboratory was accredited in June 1988. The objective of the AAP is to provide a mechanism for formally recognizing the competency of construction materials testing laboratories to carry out specific tests on soils, asphalt cements, cutback asphalts, emulsified asphalts, bituminous concrete mixtures, concrete aggregates. AAP is structured to comply with ASTM Standards, Guide for Laboratory Accreditation Systems (E 994) and Practice for Generic Criteria for Use in the Evaluation of Testing and Inspection Agencies (E 548), and International Standards Organization (ISO) Guide 25. AASHTO has assigned responsibility for administering the program to its Highway Subcommittee on Materials. Information on the program scope, operational procedures, and current status are given.
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