What is slab? Types of slab? How to provide reinforcements slab? How to provide of casting slab?

Slab: Slab is constructed to provide flat surface usually horizontal in building floor, roofs, bridges, and other types of structures.

The slab may be supported by walls, by reinforced concrete beams usually cost monolithically with the slab, by structural steel beams, by columns or by ground. There are 16 diffirent types of slab in construction. Some of them are outdeted and many of them are frequently used every where

Types of slab:

1. Flat slab: The flat slab is a reinforced concrete slab supported directly by concrete columns or caps.Flat slab does not have beam so it is also called beamless slab.

Thickness of flat slab is minimum 200 mm or 8".At the top provide plain celling surface giving better deffusion of lite.This types of slab are provided in parking.

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Compressive strength test of concrete by cube test

Cube Test: In this test chque a compressive strength of concrete. Take a cube mould which dimentions are 150 mm×150 mm×150 mm (l×b×h) symultenouly. Also used a tamping rod of 16mm dia.Before the filling of cube mould apply the oil in the internal surface prolerly by which mould open eayly and surface be come smooth. On the cube writedown the casting date, grid number, footings, columns, beams, or slab. After 12 hours remove from mould and sink in quring pond. Generly we are cast 6 cubes, 3 cubes test after 7 days and 3 cubes test at 28 days. If you can test at 14 days then need to be cast of 9 cubes. In each test take 3 cubes and consider avrage value of all 3rd.After 7 days concrete cubes dry prolerly in the persence of sun. Weight the cube one by one and writedown. The each weight of concrete cube not less than 8.1 kg. How we proove that the weight of concrete cube should not be less than 8.1 kg. Given dimentions of cube are length =150mm=0.15m, width=150mm=0.15m, de...

What is RCC? What is procedure of RCC? Types of steel bar?

RCC: RCC stands for reinforced cement concrete, that means which type of concrete in which steel is persent. RCC is a concrete with reinforcement embeded in it. The embedded reinforcement makes it capable of resisting tension also. Steel bars embedded in the tension zone of concrete relives concrete of any tension and takes all tension without separating from concrete. The bond between steel and shrounding concrete ensures strains compatibility i e, the strain at any point in the steel is equal to that in the adjoining concrete. Reiforcing steel impacts ductility to concrete which is otherwise brittle material.Here ductility means large deflection owing to yielding of steel thereby giving ample warning of impendings collaps. Tensile strength in concrete asise on account of deirect tension, flexural tension, diagonal tension due to temperature and shrinkage efects, restraint to deformation.Under those conditions reinforcement must be provided across potential tensile crack. Grade o...

What is beam? Types of beam? How to reinforcements of beam?

Beam: Beam is a horizontal structural member spacing and distance between one or more supports and carrying vertical loads across its longitudinal axis. Types of bean: Beams are mainly of six types, which are given below. 1. Simply supported beam: In this type of beam supports act at the end of beam. 2. Cantilever beam: In the cantilever meam one end fixed and other end is free. 3. Overhanging beam: If the end portion of the beam is extended beyound the support such as a beam is known as overhanging beam. 4. Contineous beam: In this type of beam more than two supports act. Contineous beam is a longer beam. 5. Fixed beam: In this type of beam both ends are fixed. 6. Propped cantilever beam: In this type of beam one end fixed and other end roller support. It is used in bridges.

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