- 2081 Kartik (new course) · 1+1 marks
Hydraulicity and lean lime
Short answer
Hydraulicity is the property of lime to set and harden underwater due to reaction of CaO with clay (silica/alumina). Lean lime contains over 30% clay, slakes and sets slowly, yields a thin, weak paste, and is used for inferior mortar in dry conditions.
Define hydraulicity of lime. Write a short note on lean lime.
Hydraulicity of lime
Hydraulicity is the property of lime that allows it to set and harden under water and in damp conditions, due to the reaction of calcium oxide with the clay (silica and alumina) present in it. It depends on the clay content, burning temperature and grinding.
Lean lime
Lean (poor) lime contains over 30% clay and other impurities. It slakes slowly, sets slowly, gives a thin paste of low strength and dirty grey colour. It is used for inferior mortar and plastering in dry conditions.
✓ Answer checked by Claude Opus 5.5 (high effort)