Plain Concrete
Major ingredients of concrete are: 1. Binding material (like cement, lime, polymer) 2. Fine aggregate (sand) 3. Coarse aggregates (crushed […]
Concrete
Plain concrete, commonly known as concrete, is an intimate mixture of binding material, fine aggregate,
coarse aggregate and water. This can be easily moulded to desired shape and size before it looses
plasticity and hardens. Plain concrete is strong in compression but very weak in tension. The tensile
property is introduced in concrete by inducting different materials and this attempt has given rise to
RCC, RBC, PSC, FRC, cellular concrete and Ferro cement. In this chapter proportioning, mixing,
curing, properties, tests and uses of plain concrete is dealt in detail. The other improved versions of
concrete are explained and their special properties and uses are pointed out.
Functions of Various Ingredients
Cement is the binding material. After addition of water it hydrates and binds aggregates and the surrounding surfaces like stone
Fibre-Reinforced Concrete (FRC)
Plain concrete possesses deficiencies like low tensile strength, limited ductility and low resistance to cracking. The cracks develop even before loading.
Ferro-Cement
The term ferro-cement implies the combination of ferrous product with cement. Generally this combination is in the form of steel wires
Desirable Properties of Concrete
Appropriate quality and quantity of cement, fine aggregate, coarse aggregate and water should be used so that the green concrete has
Curing of Concrete
Curing may be defined as the process of maintaining satisfactory moisture and temperature conditions for freshly placed concrete for some specified
Copper
It is a naturally available metal in the form of ores which contain small amount of iron and sulphur. After
Cellular Concrete
It is a light weight concrete produced by introducing large voids in the concrete or mortar. Its density varies from 3