This presentation consists of sources, formation, types and applications of a construction material called calcium oxide better known as lime. This material is now largely replaced by cement but it still remains one of the most important material due to it being the raw material for cement production as well as gaining popularity in recent times due to it being sustainable compared to cement used in construction.

1. Lime
By Aditi Kamlesh Shah
Lecturer
Civil Engineering Department

2. Lime (ચૂનો)

3. Lime (ચૂનો)
Used since ancient time: Egyptians,
Romans
In India: big palaces, bridges,
temples, forts, monuments
What is its replacement ???
Cement

4. Lime is not freely available in nature but is obtained by
burning natural materials such as limestone, seashells,
kankar, coral, etc.
All these material contain calcium carbonate. CaCO3
What is Lime?

5. Lime is obtained by calcination of limestone
at a temperature of 550-1100 degree Celsius.
(Burning in kiln without oxygen)
𝐶𝑎𝐶𝑂3 𝐶𝑎𝑂 + 𝐶𝑂2
How do we get Lime?

6. •Good Plasticity
•Flexible and Easily workable
•Provides great strength to masonry
•Becomes solid in less time and hardens
•Excellent binding
•Durable
•Less shrinkage
•Highly resistant to moisture
Properties of Lime?

8. Fat Lime
Hydraulic Lime
Poor Lime
Classification of Lime

9. •white in colour
•high calcium oxide content
•can set and become hard only in the
presence of carbon dioxide.
•also called high-calcium lime, pure lime, rich
lime or white lime
•specific properties such as very slow
hardening, high degree of plasticity and
slakes violently in water.
Fat Lime

10. •used in plastered surfaces for whitewashing.
•used as lime mortar (a combination of lime and
sand) for plastering and pointing works.
• used as a Lime Surkhi mortar for foundations,
thick masonry walls, etc., where surkhi is the
powder obtained by pounding burnt bricks.
Fat Lime Uses

11. Whitewashing
Plastering and
pointing works
Lime surkhi mortar
for foundations,
thick masonry walls
Fat Lime Uses

12. The process of adding water to calcium
oxide to produce calcium hydroxide
is called slaking of lime. It is an exothermic
process releasing a great amount of heat.
𝑪𝒂𝑶 + 𝑯 𝟐 𝑶 𝑪𝒂(𝑶𝑯) 𝟐+ 𝑯𝒆𝒂𝒕
Slaking of Lime

13. 𝑪𝒂𝑶 + 𝑯 𝟐 𝑶 𝑪𝒂(𝑶𝑯) 𝟐+ 𝑯𝒆𝒂𝒕
Slaking of Lime

14. 1. Tank Slaking
2. Platform Slaking
Types of Slaking
150 mm thick
layer of lime

15. Lime
Stone
Quick
Lime
Slaked
Lime
Lime Cycle
𝑪𝑶 𝟐
𝑪𝑶 𝟐

16. This lime is also known as the
hydraulic lime as it sets under
water. It cannot set without
presence of water.
Hydraulic Lime

18. 1. Tank Slaking (Fat lime)
2. Platform Slaking
(Hydraulic Lime)
Types of Slaking
150 mm thick
layer of lime

19. •Also known as impure or lean lime.
•Contains more than 30 % of clay.
•Slakes very slowly.
•Forms a thin paste with water.
•Sets or hardens very slowly.
•Poor binding properties and muddy white in color.
•Makes a very poor mortar. Such mortar can be
used for inferior type of work or at places where
good lime is not available.
Poor Lime

21. 1. chemical raw material in
the purification of water
and for sewage treatment.
2. flux in the metallurgical
industry.
3. binder for concrete and
mortar.
Uses of Lime

22. 4. refractory material for lining
open-hearth furnaces.
5. production of glass.
6. making mortar for masonry
work.
7. plastering of walls and
ceilings.
Uses of Lime

23. 8. production of
artificial stone,
lime-sand brick
9. soil stabilization
Uses of Lime

24. 10. improving soil for
agricultural purposes
11. Whitewashing
Uses of Lime

25. 11. base coat for
distemper
Uses of Lime