The Specification of Concrete Strength. Part III. The Design of Acceptance Criteria for the Strength of Concrete

摘要

The Report reviews the types of criteria which are available for the judgement of compliance with specification of the results of strength-tests on concrete. All acceptance judgements involve a risk to the producer that good concrete may be judged unacceptable and a risk to the consumer that poor concrete may not be detected. It is suggested that the most effective way of judging concrete strengths will be through the use of a series of criteria at constant producer's risk which enable unsatisfactory material to be detected rapidly with the final acceptance delayed until 20 or 30 tests have been obtained and the consumer's risk is thus reduced to a reasonable level. (Author)