Please Check the value of alpha from your reference book, as it can be different in different books.
Relation between change in length and temperature is given by:
dL = L0*alpha*dT
L0 = original length of concrete slabs = 375 cm = 3.75 m
alpha = thermal expansion coefficient of concrete slabs = 12*10^-6 /C
dT = change in temperature = Tf - Ti
Tf = 0 F = -17.78 C
Ti = 115 F = 46.11 C
So, Using these values:
dL = 3.75*12*10^-6*(-17.78 - 46.11)
dL = -2.87*10^-3 m
dL = -2.87 mm
So gap at 0 F will be 2.87 mm
Please Upvote.
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