   Chapter 10, Problem 28P

Chapter
Section
Textbook Problem

The concrete sections of a certain superhighway are designed to have a length of 25.0 m. The sections are poured and cured at 10.0°C. What minimum spacing should the engineer leave between the sections to eliminate buckling if the concrete is to reach a temperature of 50.0°C?

To determine
The minimum spacing between the sections.

Explanation

Given Info: Length of the concrete section ( L0 ) is 25.0 m. The temperature changes from T1=10.0οC to T2=50.0οC . The co-efficient of linear expansion ( α ) for concrete is 12×106/οC

Formula to calculate the minimum spacing is,

ΔL=αL0(T2T1)

Substitute 12×106/οC for α , 25.0 m for L0 , 10.0οC for T1 and 50

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