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Rigid pavements are generally constructed in three layers – a prepared subgrade, base or sub base, and a _______________

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Rigid pavements are generally constructed in three layers – a prepared subgrade, base or sub base, and a _______________

(a) RCC

(b) Concrete slab

(c) Steel

(d) Cement slab

I had been asked this question in an interview for internship.

This intriguing question originated from Analysis of Rate of Road Work in portion Analysis of Rates of Civil Engineering Drawing

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The correct option is (b) Concrete slab

The explanation is: The concrete slab is constructed according to a designed choice of plan dimensions for the slab panels, directly influencing the intensity of thermal stresses occurring within the pavement. In addition to the slab panels, temperature reinforcements must be designed to control cracking behaviour in the slab. Joint spacing is determined by the slab panel dimensions.

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