Introduction
A cement can be simply defined that material, which works as a binder. It sets and hardens when it dries and is capable of reacting with carbon dioxide in the air while also being capable of binding other materials together. The term ‘cement’ can be traced back to Romans. The earliest version perhaps, dates back to third millennium B.C. where it was used in Mesopotamia.
How Does Cement Work? 
Cement works by holding the materials together; rather binding them and this binding effect is achieved when it reacts with water. Over time, the chemical reaction continues to occur and it is said that the reaction is infinite (continues forever). Cement is used by making a mix of cement, sand and plaster of Paris.
Types of Cement
- Portland cement
- Energetically modified cement
- Portland cement blends
Applications of Cement
- Cement is used to take care of cracks in concrete buildings.
- Cement mortar is employed for masonry tasks, plastering and pointing.
- It is used for the construction of lamp posts, railway sleepers, piles etc.
- It is used a constituent for concrete.
- Used for making pipes, dust bines, flower pots etc.
Precautionary Measures 
- It is highly alkaline but the setting process is exothermic, therefore can cause skin burns.
- Wear protective gloves while working with cement.
- Dry Cement should be covered to avoid irritation in eyes.
- Cement’s components can cause allergies.
