On the 28th day after concrete was mixed, a 6.00-in-diameter concrete cylinder failed in a compressive testing at a load of 145 000 lb. (a) Determine the ultimate strength of the concrete, in lb/in?. (b) Determine the allowable compressive stress with a factor of safety of 5.0 against ultimate strength. (c) Determine the maximum permissible load that the concrete can carry using the strength design method. Use a strength reduction factor of 0.60 against ultimate strength.

On the 28th day after concrete was mixed, a 6.00-in-diameter concrete cylinder failed in a compressive testing at a load of 145 000 lb. (a) Determine the ultimate strength of the concrete, in lb/in?. (b) Determine the allowable compressive stress with a factor of safety of 5.0 against ultimate strength. (c) Determine the maximum permissible load that the concrete can carry using the strength design method. Use a strength reduction factor of 0.60 against ultimate strength.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter20: Design Of Rigid Pavements

Section: Chapter Questions

Problem 1P: Portland cement concrete consists of what four primary elements?

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