a. Feebly hydraulic lime:
It contains less than 15% of silic and alumina. It slakes slowly. The expansion on slaking is small. It produces good mortar.
b. Moderately hydraulic lime:
It contains 15-25% of silica and alumina, slakes slowly with small expansion and is stronger than feeble type. It is suitable for good class of mortar, brick work and masonry.
c. Eminently hydraulic lime:
It contains 25-39% of silica and alumina. Its chemical composition is very similar to ordinary Portland cement. It is stronger than moderate type, used for good quality of works but the mortar must not contain unslaked coarse particles.