For a 25 cm thick cement concrete pavement, analysis of

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For a 25 cm thick cement concrete pavement, analysis of stresses gives the following values Wheel load stress due to corner loading 30 kg/cm² Wheel load stress due to edge loading 32 kg/cm²
Warping stress at corner region during summer 9 kg/cm²
Warping stress at corner region during winter 7 kg/cm²
Warping stress at edge region durng summer 8 kg/cm²
Warping stress at edge region during winter 6 kg/cm²
Frictional stress during winter 5 kg/cm²
Frictional stress during winter 4 kg/cm²
The most critical stress value for this pavement is

1. 40 kg/cm²
2. 42 kg/cm²
3. 44 kg/cm²
4. 45 kg/cm²

Correct Option: B

During Summer At edge
S_R = Wheel load (edge) + warping stress (edge) – friction resistance (–ve)
= 32 + 8 – 5 = 35 km/m²
At Corner
S_R = Wheel load + warping stress
= 30 + 9 = 39 kg/cm²
During winter
At edge
S_R = Wheel load + warping stress + frictional resistance (+ve)
= 32 + 6 + 4 = 42 kg/m²
At corner
S_R = Wheel load + warping stress
= 30 + 7 = 37 kg/m²
The critical value is 42 kg/m²