QUALITIES OF GOOD CONCRETE

 Good concrete must be durable, dense, watertight, workable and be able to resist wear and tear.

(1) STRENGTH

Concrete should be able to withstand the stress which it is subjected to.

(2) DURABILITY

Concrete should be able to withstand the weathering action such as of wind, rain, frost and varying temperature.  When used in the construction of drains and sewers or structures in touch with sea water it should be able to resist the action of chemical salts.

(3) DENSITY

The concrete should be able to well compacted so that there are no voids or hollows left. It should weigh 3000 kg/cu metre.

(4) WATER TIGHTNESS

In case of constructing dams and elevated tanks and water reservoirs, the concrete should be water tight otherwise it will damage the structure and corrode the steel.

(5) WORKABILITY

It should be easily workable.

(6) RESISTANCE TO WEAR AND TEAR

Concrete should be able to withstand abrasive forces in case of floor and road construction.