- 2078 Bhadra · 2 marks
Types of hydraulic lime
Short answer
Hydraulic lime types: feebly hydraulic (5–15% clay) sets in 15–20 days, low strength; moderately hydraulic (15–25%) sets in ~1 week, moderate strength; eminently hydraulic (25–30%) sets in 1–2 days, strongest. IS 712 classes: A (eminently), B (semi), C (fat), D (magnesium), E (kankar).
Explain different types of hydraulic lime.
Hydraulic lime is classified by the clay content, which decides its hydraulicity.
| Type | Clay content | Features | Use |
|---|---|---|---|
| Feebly hydraulic | 5-15% | Slakes fairly quickly, sets in 15-20 days, low strength | Plastering and mortar in dry places |
| Moderately hydraulic | 15-25% | Slakes slowly, sets in about a week, moderate strength | Masonry mortar in damp places |
| Eminently hydraulic | 25-30% | Slakes very slowly, sets in 1 to 2 days, strongest | Foundations, work under water, damp conditions |
IS 712 also classes lime as Class A (eminently hydraulic), B (semi-hydraulic), C (fat lime), D (magnesium lime) and E (kankar lime).
✓ Answer checked by Claude Opus 5.5 (high effort)
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