Concrete mix ratio with higher performance
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Concrete mix ratio

Concrete mix ratio refers to the ratio between the component materials of concrete. Concrete proportion commonly use quality of various concrete materials per cubic meter or consumption quality of various concrete materials to describe. (cement quality of 1).    
Basic requirements for design of concrete mix ratio:
1, to meet the strength level of concrete design.
2, to meet the construction requirements of concrete and workability.
3, to meet the durability requirements to use of concrete.
4, to meet the above conditions, saving cement and reducing the cost of concrete.  
  
On the surface, concrete mix ratio calculation is just consumption of cement, sand, gravel and concrete mix water. The amount of materials is essentially according to the composition of materials to determine the three parameters and meet the above four basic requirements: water cement ratio, sand ratio and water consumption units.
Concrete is divided into several grades according to the strength, the strength grade of Concrete is based on the cube compressive strength standard values of FCU, K division. The cube compressive strength standard value is a value of the overall distribution of the cubic compressive strength. The strength is lower than the percentage less than 5%, which is 95% of the guaranteed rate. The strength of concrete is divided into C7.5 C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, and twelve grades. 
There are two representation methods: one is to use a variety of materials, for example 300 kg cement concrete, 180 kg water, 690 kg sand , and 1260 kg gravel; the other is that the water cement ratio, cement ratio and concrete content of different materials per unit to representative.
The design of concrete mix ratio is an important work in concrete engineering. It directly affects the smooth construction of concrete, the quality of concrete engineering and the cost of concrete engineering.

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