The 'grouting' method used to fill large voids in karstic limestone is:
Choose the correct answer
Compaction grouting (too viscous for large voids)
Bulk (filling) grouting — cement-bentonite slurry poured or pumped into large karstic voids and mine workings
Chemical grouting with silicates only
Electro-osmosis (for cohesive soils only)
Correct Answer
B. Bulk (filling) grouting — cement-bentonite slurry poured or pumped into large karstic voids and mine workings
Why is this the answer?
Types of grouting: (1) Permeation (chemical) grouting: low-viscosity chemicals (sodium silicate, acrylate) for fine sands; (2) Compaction grouting: stiff grout densifies loose soil; (3) Jet grouting: high-pressure jet cuts soil + grout forms column; (4) Bulk/filling grouting: cement-bentonite slurry poured into large voids (karst caves, old mine workings, tunnels). Karst voids: drilling + gravity/low-pressure cement filling.
Related Soil Mechanics MCQs
More solved Soil Mechanics questions for AE/JE Civil Engineering exams.
- The 'Hvorslev parameters' c_e and φ_e in soil mechanics refer to:
- The 'International Building Code' (IBC) and IS codes classify building sites for...
- 'Vibro-flotation' (vibro-compaction) is used to densify:
- The 'shear strength' of soil measured in an 'undrained triaxial test' (UU test) is:
- The 'IS 2911' code series covers:
- The 'primary consolidation' of a clay layer settles because:
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.