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Title: Optimization of high-strength concrete mixture proportions for the ANMCC Improvement Project
Authors: Bombich, Anthony A.
Magoun, A. Dale.
Keywords: ANMCC Improvement Project
High strength concrete
Nuclear weapons effects
Strength of materials
Concrete testing
Nuclear explosions
Concrete specifications
Alternate National Military Command Center
Publisher: Structures Laboratory (U.S.)
Series/Report no.: Miscellaneous Paper (Structures Laboratory (U.S.)) ; SL-82-12
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 73 F and 122 F in sealed and immersed condition. The study indicated that all mixtures containing pozzolan failed to gain appreciable strength after 28 days age when cured at 122 F. This was the appropriate curing temperature which would exist in ANMCC concrete liners. The optimum mixture chosen contained 658 lb of Type V cement, with no pozzolan replacement, and contained high-range water-reducing admixtures. Water-cement ratio by weight was 0.364. Statistical analyses performed on Phase I test results appear as appendices. 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.
Description: Miscellaneous Paper
Rights: Approved for public release; distribution is unlimited
Size: 115 pages
Types of Materials: PDF/A
Appears in Collections:Miscellaneous Paper

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