The Specification of Concrete Strength, Part II. The Distribution of Strength of Concrete for Structures in Current Practice

摘要

Part I of this series of reports considered the statistical implications of several existing specifications for concrete strength using as the principal measure of quality the estimated proportion defective to the specified strength. The present report considers the quality of concrete which results from such specifications. The data were drawn from about 400 jobs where concrete was produced for highway structures and about 230 jobs where the concrete was used for general structural works. The latter series of jobs was included to extend the range of work covered and to provide some information on how the quality of concrete in highway structures compares with the general run of structural works. (Author)