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The width of expansion joint gap is 2.5 cm in a cement concrete pavement. The spacing between expansion joint for a maximum rise in temperature of 25°C is (assuming coefficient of thermal expansion of concrete as 10 x 10-6 per °C)
  • a)
    5 m
  • b)
    50 m
  • c)
    100 m
  • d)
    25 m
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The width of expansion joint gap is 2.5 cm in a cement concrete paveme...

Coefficient of thermal expansion 
C = 10 X 10-6 per°C
∴ Spacing of expansion joint,
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The width of expansion joint gap is 2.5 cm in a cement concrete paveme...
°C is 30 meters. Calculate the coefficient of thermal expansion of concrete.

To calculate the coefficient of thermal expansion of concrete, we can use the following formula:

α = ΔL / (L0 * ΔT)

Where:
α = coefficient of thermal expansion
ΔL = change in length due to temperature (in meters)
L0 = initial length of the pavement (in meters)
ΔT = change in temperature (in Celsius)

We can start by calculating the change in length due to temperature using the expansion joint spacing and gap width:

ΔL = spacing between joints * gap width = 30 m * 0.025 m = 0.75 m

Next, we need to calculate the initial length of the pavement, which is equal to the spacing between joints plus the width of the gap:

L0 = spacing between joints + gap width = 30 m + 0.025 m = 30.025 m

Finally, we can calculate the coefficient of thermal expansion using the given maximum rise in temperature of 25°C:

α = ΔL / (L0 * ΔT) = 0.75 m / (30.025 m * 25°C) ≈ 9.98 x 10^-6 /°C

Therefore, the coefficient of thermal expansion of concrete is approximately 9.98 x 10^-6 /°C.
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The width of expansion joint gap is 2.5 cm in a cement concrete pavement. The spacing between expansion joint for a maximum rise in temperature of 25°C is (assuming coefficient of thermal expansion of concrete as 10 x 10-6 per °C)a)5 mb)50 mc)100 md)25 mCorrect answer is option 'A'. Can you explain this answer?
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