A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Optimized Aggregates Gradations for Portland Cement Concrete Mix Designs Evaluation
This research main purpose was to optimize aggregate blends utilizing more locally available materials. With the industry collaboration and partnership, the Department embraced a change that impacts a specification implemented in the 1947 for Class of 47B concrete. This aggregate optimization embraces todays availability of new blended cements in Nebraska. These new blended cements enhanced the Alkali Silica Reaction of Nebraskas sand and gravel. As well as, and not short of improving future gradation from a gap-graded to a more dense gradation. Combined aggregate gradations were evaluated for mechanical and durability characteristics for paving mix designs. The outcome of these evaluations resulted in the introduction of a new blend aggregate grading band for the Department named 47B Revised (47BR), which would allow the use of more locally available materials currently being produced in the state, thereby optimizing its economy. The goal for the new 47BR Combined Aggregate Gradation is to have the contractor, with agency oversight, develop a concrete mix design with an optimum combined aggregate gradation and provide the Contractor with the testing and control responsibilities to ensure a quality product. This report presents the results of the evaluation and optimization of the 47BR Concrete Specification.
Optimized Aggregates Gradations for Portland Cement Concrete Mix Designs Evaluation
This research main purpose was to optimize aggregate blends utilizing more locally available materials. With the industry collaboration and partnership, the Department embraced a change that impacts a specification implemented in the 1947 for Class of 47B concrete. This aggregate optimization embraces todays availability of new blended cements in Nebraska. These new blended cements enhanced the Alkali Silica Reaction of Nebraskas sand and gravel. As well as, and not short of improving future gradation from a gap-graded to a more dense gradation. Combined aggregate gradations were evaluated for mechanical and durability characteristics for paving mix designs. The outcome of these evaluations resulted in the introduction of a new blend aggregate grading band for the Department named 47B Revised (47BR), which would allow the use of more locally available materials currently being produced in the state, thereby optimizing its economy. The goal for the new 47BR Combined Aggregate Gradation is to have the contractor, with agency oversight, develop a concrete mix design with an optimum combined aggregate gradation and provide the Contractor with the testing and control responsibilities to ensure a quality product. This report presents the results of the evaluation and optimization of the 47BR Concrete Specification.
Optimized Aggregates Gradations for Portland Cement Concrete Mix Designs Evaluation
W. Heyen (author) / L. Halsey (author) / R. Rea (author) / M. Syslo (author) / T. Gernert (author)
2013
39 pages
Report
No indication
English
Highway Engineering , Construction Equipment, Materials, & Supplies , Construction Materials, Components, & Equipment , Materials Degradation & Fouling , Portland cement , Limestone , Aggregates , Concrete durability , Performance evaluation , Quality control , Compressive strength , Chlorides , Permeability , Chemical reactivity , Abrasion resistance , Aging , Stiffness , Mechanical tests , Flexural strength , Tensile strength , Length , Igneous rock
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