Engineering, 28.04.2021 18:10 acoverupoze5th

A minimum compressive strength of at least 4500 psi, after 180 days of curing (aging) time, is specified for the concrete used in a bridge project. It is further specified that a water-cement ratio of 0.5, a slump of 1.5 inch, and an air entrainment of 4% be used. To provide a curing protocol that will produce the required compression strength, the concrete should be moist-cured and then cured: A. In air after 3 days B. In air after 7 days C. In air after 14 days D. A compressive strength of at least 4500 psi cannot be attained

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A minimum compressive strength of at least 4500 psi, after 180 days of curing (aging) time, is speci...

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