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commissive strength of concrete values

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commissive strength of concrete values

Apr 16 2020 · Where phi Standard Deviation µ Average Strength of Concrete n Number of Samples x Crushing value of concrete in Nmm 2 The value of standard deviation will be lesser if the quality control at the site is excellent and most of the test results will be approximately equal to the mean value... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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