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- W2092186870 abstract "The feasibility of seismic methods for determining the quality and thickness of portland cement concrete layers was recently studied. The study consisted of performing nondestructive laboratory seismic tests on cylinders that were laboratory-cured for 2 to 90 days. The cylinders were then subjected to appropriate strength tests (such as compressive and splitting tensile). Reasonably high correlations were found between static modulus, compressive strength, or tensile strength and seismic modulus. Seismic moduli were also found to be repeatable, as the coefficients of variation for different lots were generally less than 2 percent. Similar tests were also performed on cores retrieved from a site constructed with similar concrete. Before coring the slabs, nondestructive seismic tests were also performed on the concrete. Seismic moduli from laboratory and field tests were close and repeatable. The coefficients of variation for the seismic tests were generally less than 3 percent and 4 percent for the laboratory and field tests, respectively. The curing patterns observed in both the field and the laboratory were very different. Regardless of the methodology used, the correlations based on the laboratory specimens appear not to be representative of the field behavior. A focus on the use of nondestructive field methods for quality control/quality assurance may be necessary." @default.
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- W2092186870 date "1997-01-01" @default.
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- W2092186870 title "Comprehensive Quality Control of Portland Cement Concrete With Seismic Methods" @default.
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- W2092186870 doi "https://doi.org/10.3141/1575-14" @default.
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