A precast beam is steam-cured for 24 hours and then prestressed. The level of prestressis 7 MPa and the compressive strength of concrete is 25 MPa. The beam is then exposedto 70% RH. Determine the total strain at the end of the first year. Given the density ofconcrete is 2320 kg/m3. [Ans: 1.34 × 10-4]

A precast beam is steam-cured for 24 hours and then prestressed. The level of prestressis 7 MPa and the compressive strength of concrete is 25 MPa. The beam is then exposedto 70% RH. Determine the total strain at the end of the first year. Given the density ofconcrete is 2320 kg/m3. [Ans: 1.34 × 10-4]

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter12: Composite Materials

Section: Chapter Questions

Problem 12.7P: Estimate the transverse tensile strength of the concrete in Problem 12.6.

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