P.C.C BED( PLAIN CEMENT CONCRETE )
A BED BELOW WALL FOOTINGS, COLUMN FOOTINGS,PLINTH BEAM,WALLS BELOW BEAMS
A SIL CONCRETE USED TO GET HEARD AND FLAT SURFACE AT WINDOWS AND VENTILATOR SILS
PRECAST CONCRETE
Usually concrete structures are built by casting them in their final position in the site by providing form work, pouring concrete and then removing the form work. It is called as cast-in-situ construction. If concrete elements are cast in factories or elsewhere and transported to their final destination, they are called precast elements.
Since the elements are cast in factories where controls are better, they are superior to cast in situ elements. However, the disadvantage is cost of transportation and achieving desired connections on site. Precast concrete is used in the following:
1. Pipes and tanks
2. Poles, piles, sleepers and pavement
3. Lintel beams
4. Beams and girders
5. Building blocks
6. Wall panels
7. Manhole covers
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