Civil Engineering - Building Materials - Discussion

Cement is mainly a binding medium which when hardened with the other materials in a concrete produces a homogeneous mass. Sand is used to fill the voids between the Coarse aggregate in which cement is used to bind these two together.

Cement is based on the mixing of cement, sand and water.

Cement have gypsum, due to which it is a binding material.

Why use of concrete in structure?

Concrete is a mixture of cement, coarse aggregates and fine aggregates (in 1:2:4 ratio, it may varies for different structures) , water.

Cement is used as binder, coarse aggregates are for strength, fine aggregates are used to fill the gaps of coarse aggregates, water is used to mix all the materials homogeneously.

Not only concrete, we can also use steel. But concrete have more resistance towards fire, and of less cost, maintenance cost is low as compared to steel so we use concrete in structures.

Disadvantage:

Steel can be reused but concrete can not be reusable.

Mortar is binding materials mixture of cement and sand so used the cement is binding materials.

Since cement contains binding properties (when it is mixed with water the chemical process called hydration is ignited).

Mortar - Binding material + Aggregates + water.

1. Aggregate - In Coarse form (Gitty) & In fine form (Mauroom).
2. Binding Material - Use as a Lime & Use as a Cement.

Lime Mortar - Lime+Gitty+Mauroom+water.
Cement Mortar - Cement+Gitty+Mauroom+Water.

Importance :

1. Coarse Material- Provide pore space for filling the binding material.

2. Binding Material- It bind coarse type of material and fine type of material with water.

Provide Minimum setting time (30min) for coarse & fine Material.

3. Fine Material- Some type of tiny pore space not filled so we used fine material & Provide good finishing.

4. Water- Mixing of coarse, Fine, & Binding material without water called Dry Mortar.

And then mix the water in Dry Mortar & make it Slurry Form.

Slurry mortar fix easily in pores.

5. Mortar is not reusable like brick and steel.

What is cinder than?

Mortar is a mixture and cement as ingredient to mortar serves as paste to bind becoming concrete.