Shaila Enterprises Submitted 2016-11-15 19:10:08 Ready mixed concrete or RMC is concrete that is prepared at the factory based on project requirements and delivered to the job site. It is a composite material that comprises of a binder and filler. The cement paste works as the binder and glues the filler together to create the synthetic conglomerate. The filler is comprised of coarse or fine aggregate depending on the kind of application. Most people have seen the ready mix concrete truck. This guide provides you valuable information about how it is made. Early Application
RMC was first made in a factory in the 1930s. However Wholesale Nike NFL Jerseys , it took another three decades before its commercial demand became consistent. Since the 1960s, the demand for concrete increased so much that it became the second most consumed substance, after water. Raw Materials
The raw materials used for producing concrete are as following:
Aggregates Cement Additives Water Air
1. Aggregates
A typical ready mix concrete calculator involves up to 75% of its composition as aggregates. This percentage can vary from 60-75% of the RMC's volume. The raw material is obtained from aggregate banks or quarries. 2. Cement
Cement plays the most important role in the preparation and price of ready mix concrete. It is responsible for giving resistance to concrete. There are different types of cements and the prices and properties will vary accordingly. 3. Additives
There are liquid and solid chemical additives. These are added to the RMC either during preparation or before preparation. Different additives have different functions. The commonly used ones can help in hardening the durability or in reducing the water content to reduce the setting times. 4. Water
Water adds fluidity to RMC and its proportion plays an important role in ready mix concrete calculator. It creates a chemical reaction when the other raw materials come in contact with it. Mixing The Raw Materials
When all the raw materials are mixed together Wholesale Authentic NFL Jerseys , it creates a uniform concrete mass. The mixing time affects the mixture's properties. Different mixing time is required for different types of construction applications. It is recorded from the moment the water and material are added into the cement mixer.
The cement mixer is part of the ready mix concrete truck and keeps rotating even during transit. Usually, the rotation speed is 2-6 rotations per minute. Ready Mixture Categories
As already mentioned, the ready mixtures can have slightly different composition. There are 3 main categories.
Central Mixed RMC - In this case the concrete is properly mixed before being transported to the site in a ready mix concrete truck. Shrink Mixed RMC - In this case the concrete is partially mixed at the plant. This helps in reducing (shrinking) the volume of the mixture. The final mixing of the raw materials takes place on the job site or on the ready mix concrete truck.
Truck Mixed RMC - As the name suggests Wholesale NFL Jerseys Online , this type of RMC is mixed during transit in the vehicle. The raw materials for the mixture are accurately weighed and batched using the ready mix concrete calculator and added to the truck.
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