Here in this article, we are going to highlight the definition, meaning and uses of lime for civil engineering students. Let’s first begin to throw light on the definition and meaning of lime and in the last section, you will get to know about the uses of lime:
Definition & Meaning
The product which is obtained by calcined burning over 900℃ of lime stone is called as lime. You must remember that lime is not something that is naturally available in a free state, but it is obtained by burning lime.
How Lime is Formed?
When the lime stone i.e calcium carbonate (caco3) is calcined, the moisture and carbon dioxide (co2) are removed and the lime i.e calcium oxide (Cao) is left obtained.
We hope that you folks are now aware about the definition, meaning and the making process of lime. Let’s begin to explain its uses in this section:
Uses of Lime
Even though, there are countless uses of lime in our lives, but here are the most common uses of lime you as a student should be aware off:
1. Lime is used as binding material in mortars
2. It is used for preparing concrete for foundation and flooring
3. It has great use in plastering of walls and white washing for rooms
4. It is also highly used as flux in steel manufacturing, knotting before timber painting
5. Besides the above mentioned short list, lime is also used for stabling soils and also helps in creating good sanitary conditions in foul, damp and filthy places.
Types of Lime
As far as types of lime goes, here are main types that have a frequent use in construction works:-
1. Quick Lime
This type of lime is obtained from burning pure lime stone and that is why it popularly referred as Quick lime.
2. Hydraulic Lime
The lime containing 5℅ to 30℅ of alumina and silica with some iron oxide is known as Hydraulic lime.
3. Fat Lime:
The lime having high calcium oxide (Cao) content is called fat, rich or white lime.
The volcanic dust containing 80℅ clay with lime, magnesia and iron oxide in varying. propotions is called Pozzolana. When pozzolana is added in powdered from with lime it imports hydraulic properties to the lime surkhi is considered artificial Pozzolana.