Quality Assurance of Aggregates
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A 24-page guide covering recommended systems and procedures for the quality assurance of aggregates.
This guideline covers the systems and procedures recommended by Civil Contractors New Zealand (CCNZ), for the quality assurance of aggregates* for roads. The guideline was developed in consultation with the Aggregate and Quarry Association of New Zealand (AQA) and the New Zealand Transport Agency (NZTA).
It is assumed the aggregate producer should have a formal quality plan system in operation in each quarry, detailing quality control procedures to be used for sourcing rock‡ and for controlling quality of each of the aggregates produced. Recommendations for developing and implementing a quality plan or system are provided in the appended explanatory note sections of this document, numbered 13 and 14.
The quality plan or system should cover all quality aspects of source material handling, aggregate processing, stockpiling and transportation, including methods and frequency of sampling and testing to be used, and should also identify key responsibilities.