Batching of concrete
Concrete is a versatile, durable, sustainable, and economical material and it is the world’s most widely used construction material. To make the excellent quality of concrete, the proportion of concrete ingredients should be measured properly and accurately. One can accurately measure the concrete ingredients by carry out the batching process. Batching is the process in which the quantity or proportion of materials like cement, aggregates, water, etc. are measured on the basis of either weigh or volume to prepare the concrete mix.
Proper Batching improves the workability of concrete by reducing the segregation or bleeding in concrete. It helps to get a smooth surface of the concrete. It also increases the speed of construction and minimizes the wastage of concrete ingredients. Hence, batching of concrete is an essential process while making concrete.
To form the durable, sustainable and economical concrete, one should have to carried out the concrete mix design (CMD). The scientific and systematic process of choosing economical relative proportion of various ingredients from the available material which gives cohesive concrete of the desired workability at the fresh stage and desired strength and durability in the hardened stage is known as Concrete mix design (CMD).
Once concrete mix design is carried out, the first task is batching of concrete materials like cement, aggregates, admixture, etc. The batching of concrete is done by measuring and combining required concrete ingredients either by weight or by volume as per the mix design.
There are three modes of batching of concrete ingredients which are generally adopted before carry out concrete mixing. They are as follows:
- Random Volumetric Batching of Concrete Ingredients.
- Volume Batching of Concrete Ingredients.
- Weigh Batching of Concrete Ingredients
Disadvantages of Poor Batching of Concrete Ingredients:
- Poor batching of concrete ingredients directly impacts the strength of concrete. Because of poorly batching, concrete ingredients never mix homogeneously and therefore workability will suffer.
- Poorly batched concrete ingredients may result in the formation of voids in the concrete which leads to honeycombing.
- Poor batching also results into porous concrete which becomes the reason of leakages in the house.
- The porous concrete may be the reason of corrosion and will ultimately reduce the life of the structure and increase the cost of repairs.