1. Materials for building

2. Materials used for construction Materials of building are those that are used in the edification of houses, monuments and public works. Stony materials: are used two types of rocks: -Compacts Rocks: there are limy blocks of stones, marble, granite, slate, sandstone, etc.

3. Stony materials (l) Stony materials: are used two types of rocks: -Compacts Rocks: there are limy blocks of stones, marble, granite, slate, sandstone, etc. Disgregates Rocks: There are fragments of rocks of variable size. They are used:

5. -Arids: They can be thin or thick.

6. Binders Materials Binders materials are materials that when they're mixed with water became pasty and they solidify acquiring rigidity. The most importants ones are: - Lime : It's a material that its obtained subjecting to heat limestone rocks - Gypsum : is used to cover walls and ceilings. - Cement : is the most widely used binder.

7. Concrete Concrete is a mixture of arids, binders and water. The most used ones are: -Concrete mass: It is obtained from the mixture of cement, water, sand and gravel. -Concrete cyclopean: Formed of cement, water and arids.

8. Concrete (ll) -Celullar Concrete: Are incorporated chemicals products that release gases and form bubbles. -Armed concrete: Are incorporated armors made by steel rods that can strain before it hardens the mass.

9. Building Construction The building construction is a large and complex process that understands several phases. Many materials are used and it implies the work of many professional. Phases: -Preparation of the area by means of operation of demolition and leveling. -Foundation: it is the placement of elements that form the base.

10. Building Construction (II) -Elevation of the structure: are constructed the props and the plates that formed the floor of the building. -Water coverage: to place the covered of the building that depends on the climate of the zone. -Placement of pavements: on the plate of every plant of the building materials are placed as marble, sandstone, wood, etc.

12. Placement of facilities: water, electricity, elevator, etc.

13. Construction of Machinery In construction of buildings are used several machines: 1.For excavating and land movements: we used excavators and loaders. 2.In the leveling of land we use bulldozers and graders. It compact the ground with rollers. 3.The materials are transported in trucks of large bonnageand and dump trucks

14. Contruction of machinery 4.In contruction, materials are rise with cranes, made up of: -Towers: metalic and vertical structure. -Feathers: metalic and horizontal structure that can have different longitudes. -The counterweight: it is a structure that is connected to the feathers in the opposite end that sopports the load that it's elevated. 5. The preparation of morters and concretes is carried out by mixers cement.