The parameter used to evaluate the strength of subgrade in rigid pavement is the Modulus of subgrade reaction. So, the correct answer is b. Modulus of subgrade reaction.

Here's why:

The Modulus of subgrade reaction (k) is a fundamental parameter in the design of concrete pavements and floor slabs. It represents the response of the subgrade (the soil structure beneath the pavement) to the loads applied to the pavement surface. It is a measure of the stiffness or elasticity of the subgrade.

The California Bearing Ratio (CBR) is a penetration test for evaluation of the mechanical strength of road subgrades and base courses, and it is not specifically used for rigid pavements

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The parameter used to evaluate the strength of subgrade in rigid pavement is the Modulus of subgrade reaction. So, the correct answer is b. Modulus of subgrade reaction.

Here's why:

The Modulus of subgrade reaction (k) is a fundamental parameter in the design of concrete pavements and floor slabs. It represents the response of the subgrade (the soil structure beneath the pavement) to the loads applied to the pavement surface. It is a measure of the stiffness or elasticity of the subgrade.

The California Bearing Ratio (CBR) is a penetration test for evaluation of the mechanical strength of road subgrades and base courses, and it is not specifically used for rigid pavements

Knowee AI · Accepted Answer

The parameter used to evaluate the strength of subgrade in rigid pavement is the Modulus of subgrade reaction. So, the correct answer is b. Modulus of subgrade reaction.

Here's why:

The Modulus of subgrade reaction (k) is a fundamental parameter in the design of concrete pavements and floor slabs. It represents the response of the subgrade (the soil structure beneath the pavement) to the loads applied to the pavement surface. It is a measure of the stiffness or elasticity of the subgrade.

The California Bearing Ratio (CBR) is a penetration test for evaluation of the mechanical strength of road subgrades and base courses, and it is not specifically used for rigid pavements

The parameter used to evaluate the strength of subgrade in rigid pavement is :a.CBR %b.Modulus of subgrade reactionc.Noned.K %

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