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what is the crushing strength of concrete

Compressive strength prediction of Portland cement ... Compressive strength prediction of Portland cement concrete with age using a new model. ... Moreover prediction of concrete strength at late ages is being significant from both technical and economical points of view. For instance, when considering the actual strength values at which the structure is being subjected to full load, materials safe ... 7-day vs. 28-day compressive strength tests Oct 12, 2008 · pipelineTZM: What you say may make rational sense, but from a contractual point of view, only the 28-d strength is regarded as the acceptance criteria unless there is a specific clause in the contract that waives this and makes the 7-d strength the acceptance strength. Concrete Bearing Jul 22, 2009 · As the concrete is compressed in one direction, it wants to spread in the orthogonal direction, but can't because of the restraining surrounds. I disagree with AHaddad1 that it is related to "shear cone" failure. Bearing failure in concrete should be thought of as a crushing failure, while shear failure is a diagonal tension failure.    Read More

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