Lime With Cement
Addition of lime to cement mortar makes the mixture thicker and stickier while wet. Addition of cement to lime mortar acts as a pozzolan giving some degree of quick set, but this comes at a price, and is not recommended.
Three cement & lime mixes have been widely used.
- 1:1:6 is a satisfactory mortar mix for various purposes, but behaves as cement based mortar.
- 1:2:9 has been found to be prone to premature failure, and is no longer recommended
- 3:1 + 5% cement makes a lime mortar that firms up quickly, avoiding delays to work, but the addition of cement has been found to be associated with premature failures, and the practice is no longer recommended.
1:2:9 and 1:1:6 are frequently mistaken for lime mortars, but are considered cement mortars, as although they contain substantial amounts of lime, their properties are primarily those of cement mortar. 1:1:4 ( lime + O.P.C + sand ) is the usual mix for the experienced builder. NOTE this calculation is based on weight NOT volume.
Read more about this topic: Lime Mortar
Famous quotes containing the words lime and/or cement:
“In our large cities, the population is godless, materialized,—no bond, no fellow-feeling, no enthusiasm. These are not men, but hungers, thirsts, fevers, and appetites walking. How is it people manage to live on,—so aimless as they are? After their peppercorn aims are gained, it seems as if the lime in their bones alone held them together, and not any worthy purpose.”
—Ralph Waldo Emerson (1803–1882)
“It is fair to assume that when women in the past have achieved even a second or third place in the ranks of genius they have shown far more native ability than men have needed to reach the same eminence. Not excused from the more general duties that constitute the cement of society, most women of talent have had but one hand free with which to work out their ideal conceptions.”
—Anna Garlin Spencer (1851–1931)