Accession Number : ADA118966

Title :   Optimization of High-Strength Concrete Mixture Proportions for the ANMCC Improvement Project.

Descriptive Note : Final rept.,


Personal Author(s) : Bombich,Anthony A ; Magoun,A Dale

PDF Url : ADA118966

Report Date : Aug 1982

Pagination or Media Count : 117

Abstract : High-strength concrete mixtures were proportioned and tested in order to achieve compressive strengths in excess of 9,000 psi at 1 year of age and 11,000 psi at 2 years of age. These mixtures were proportioned to minimize total heat generation when used during construction of the Alternate National Military Command Center (ANMCC). Minimization of heat generation, especially that occurring at early ages, serves to minimize thermal strains occurring in the concrete cavity liners. The study was conducted in two phases. In Phase I a matrix of 28 high-strength concrete mixtures was evaluated to isolate concrete mixtures which best met the specified criteria. Mixtures contained several levels of water reduction, cement contents, and pozzolan (fly ash) replacement of cement. Steel fibers were also used. Curing was done at 733 F and 122 F in sealed and immersed condition. Phase II included tests on the mixture chosen as optimum from Phase I. Included were tests to determine thermal and mechanical properties on concrete specimens cured at 73 F and 122 F in sealed condition. The data obtained from Phase II tests were used in computer thermal studies for the ANMCC.

Descriptors :   *Concrete, Mixtures, Additives, Cements, Fly ash, Curing, Thermal properties, Heat, Production, Compressive properties, Strength(Mechanics), Flexural strength

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE