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Stress-strain behavior of cementitious materials with different sizes.


ABSTRACT: The size dependence of flexural properties of cement mortar and concrete beams is investigated. Bazant's size effect law and modified size effect law by Kim and Eo give a very good fit to the flexural strength of both cement mortar and concrete. As observed in the test results, a strong size effect in flexural strength is found in cement mortar than in concrete. A modification has been suggested to Li's equation for describing the stress-strain curve of cement mortar and concrete by incorporating two different correction factors, the factors contained in the modified equation being established empirically as a function of specimen size. A comparison of the predictions of this equation with test data generated in this study shows good agreement.

SUBMITTER: Zhou J 

PROVIDER: S-EPMC3972930 | biostudies-other | 2014

REPOSITORIES: biostudies-other

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