Soil Stabilization MCQ with answer and solution

Concept

Roller selection for soil cement roads

Formula

NONE

Step-by-step solution

1. Soil-cement stabilization requires compaction equipment capable of achieving high density rapidly before the cement sets. 2. Vibratory rollers provide intense dynamic impact loads that effectively compact stabilized coarse and fine soil mixtures. 3. Hence, vibratory rollers are preferred for soil cement stabilized base and subbase courses. Answer: A

Explanation

Soil-cement stabilization requires dynamic compaction forces to effectively interlock soil particles and cement before setting occurs. Vibratory rollers deliver rapid impact forces that break down air voids and achieve uniform high density in stabilized subgrades and base courses. Consequently, vibratory rollers are preferred for soil-cement road construction.

Why the other options are wrong

B) Sheepfoot rollers are suitable for compacting cohesive clay soils rather than soil-cement mixtures. C) Pneumatic rollers are primarily used for bituminous courses and cohesionless soils. D) Smooth wheel rollers provide insufficient compaction depth for soil-cement stabilization.

Shortcut

Pneumatic tire rollers are preferred for soil-cement stabilization.

Common mistake

Choosing a sheepfoot roller assuming it applies to all soil stabilization types rather than a vibratory roller.