Choice of pavement type: An “ideal” pavement in terms of rigidity and durability under heavy traffic is commonly associated with which construction material?

Introduction / Context:
Pavements are broadly of two types: flexible (bituminous) and rigid (cement concrete). Rigid pavements distribute loads over a wide area due to slab action and exhibit excellent longevity when designed and built properly.

Given Data / Assumptions:

• “Ideal” here refers to rigidity, durability, and reduced deformation under heavy traffic.
• Life-cycle performance is prioritized over initial cost.

Concept / Approach:
Portland cement concrete pavements, being rigid, develop slab action, have higher modulus, and generally experience less rutting compared to flexible pavements. They are often chosen for heavy-duty facilities like airports, industrial yards, and high-volume highways.

Step-by-Step Solution:
Consider performance criteria: structural capacity and durability.Match criteria to pavement types: rigid pavements excel in rigidity and longevity.Select Portland cement concrete as the ideal from the given options.

Verification / Alternative check:
Performance records show rigid pavements with well-designed joints and reinforcement provide long service lives with low rutting, validating the selection.

Why Other Options Are Wrong:

• Bricks/hard soil/tar alone do not match the structural rigidity and long-term performance of cement concrete slabs.

Common Pitfalls:

• Equating “ideal” with lowest initial cost; rigid pavements may cost more initially but last longer.
• Neglecting joint design and curing, which are crucial for rigid pavement success.

Final Answer:
Portland cement concrete (rigid pavement)