Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microconcrete for model drilled shaft foundations
A special microconcrete was developed for constructing and simulating model drilled shaft foundations in large laboratory deposits of clay and sand. Specific attention was given to defining the structural properties of the microconcrete while young (1,2,4 and 11 days) and under special curing conditions, because these could affect the relative rigidity of the soil-shaft system. This paper presents a review of the mix design, testing programme on cylinders and beams, and concrete properties including: compressive strength (fc), flexural strength (fr), static elastic modulus (E40) and dynamic modulus (Ed). After several trial-and-error iterations in testing, a favourable mix with the desired performance for rigid model testing was attained. The laboratory testing programme indicated that commonly used correlations for estimating modulus based on fc at 28 days significantly overpredict the value of E40 for young concrete. Non-destructive evaluation of Ed by ultrasonics proved capable as an index for mapping strength gains with time for both compression and flexural tests.
Microconcrete for model drilled shaft foundations
A special microconcrete was developed for constructing and simulating model drilled shaft foundations in large laboratory deposits of clay and sand. Specific attention was given to defining the structural properties of the microconcrete while young (1,2,4 and 11 days) and under special curing conditions, because these could affect the relative rigidity of the soil-shaft system. This paper presents a review of the mix design, testing programme on cylinders and beams, and concrete properties including: compressive strength (fc), flexural strength (fr), static elastic modulus (E40) and dynamic modulus (Ed). After several trial-and-error iterations in testing, a favourable mix with the desired performance for rigid model testing was attained. The laboratory testing programme indicated that commonly used correlations for estimating modulus based on fc at 28 days significantly overpredict the value of E40 for young concrete. Non-destructive evaluation of Ed by ultrasonics proved capable as an index for mapping strength gains with time for both compression and flexural tests.
Microconcrete for model drilled shaft foundations
Mayne, Paul W. (Autor:in) / Hover, Kenneth C. (Autor:in) / Kulhawy, Fred H. (Autor:in)
Construction and Building Materials ; 8 ; 127-135
16.02.1994
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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