Ready mixed concretes in construction

Ready mixed concrete:

If instead of being batched and mixed on site, concrete is delivered for placing from a central plant. It is referred to as ready-mixed or pre-mixed concrete. This type of concrete is used extensively abroad as it offers numerous advantages in comparison with other methods of manufacture:

1.                  Close quality control of batching which reduces the variability of the desired properties of hardened concrete.

2.                  Use on congested sites or in highway construction where there is little space for a mixing plant and aggregate stockpiles;

3.                  Use of agitator trucks to ensure care in transportation, thus prevention segregation and maintaining workability

4.                  Convenience when a small quantity of concrete or intermittent placing is required.

There are two categories of ready-mixed concrete: central-mixed and transit mixed or truck mixed. In the first category, mixing is done in a central plant and then concrete is transported in an agitator truck. In the second category, the materials are batched at a central plant but are mixed in a truck.

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