Ready Mixed Concrete is prepared concrete that is manufactured in a factory by a cement manufacturer or within a batching plant based on the standard required specifications. The prepared concrete mix is taken to the worksite within transit mixers, this type of concrete guarantees higher strength and sustainability. The mixture is precise and of higher quality. Special concrete mixtures can also be made efficiently by this type of concrete manufacturing method.
Types of Ready Mixed Concrete
There are three major types of ready mix concrete or RMC based upon the mixing of the various ingredients such as the transit mixed concrete, shrink mixed concrete and Central mixed concrete.
Transit mixed concrete
It is known as dry batched concrete because all the basic ingredients are charged into the truck mixer. It is manufactured in a factory by a cement manufacturer or within a plant based on the standard specifications. In this type of ready mix concrete, three different types of variations are possible like Concrete mixed at the job site, Concrete mixed in transit and Concrete mixed in the yard. Concrete mixed at the job site while being transported towards the destination, the drum is revolved at a slow speed of 2 rpm, but after reaching the site just before discharging the material. It is usually revolved at the maximum speed of 12 to 15 rpm for ensuring homogeneous mixing. For Concrete mixed in transit. The drum speed is kept medium during the transit time. After some revolutions, speed is reduced down to the agitating speed and for Concrete mixed in the yard, the drum is increased at a high speed. The concrete is then moved slowly.
Shrink mixed concrete
In the plant mixer, the concrete is partially mixed. The amount of mixing depends upon the extent of mixing done in the mixer. Tests should be conducted to establish the necessity of mixing the drum mixer.
It is also called a central batching plant. Here the concrete is mixed before loading into the truck mixer. The plant is also known as pre-mix plants or wet-batch.. The truck mixer acts as an agitator while transporting the concrete. Sometimes, when the workability requirement is low, non-agitating units can also be used.
Major Advantages of Ready Mixed Concrete
Good quality concrete is obtained as a ready-mix concrete mix plant that makes use of sophisticated equipment. There is control over the continuous monitoring of key practices ,testing of materials, process parameters and during the manufacture. The Ready mixed concrete speed is achieved continuously by having mechanised operations. The output obtained from a site mix concrete plant is 4 to 5 metric cubes per hour which are 30-60 metric cubes per hour.
The concrete mix is used with high versatility. It is placed by following the best concrete placing methods. Cement saving will save energy and resources. Small or large quantities of concrete as per the stipulation is delivered appropriately at the site. The Cement saving will preserve the energy and resources.