CONCRETE MIX DESIGN for all grades OF CONCRETE

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CONCRETE MIX DESIGN:

The strength is mainly influenced by the water/cement ratio, and the w/c ratio is almost independent of the parameters such as the properties of concrete with a compressive strength of the designed mix are influenced by the properties of aggregate in addition to that of water cement ratio. To obtain good strength, it is necessary to use the lowest possible w/c ratio which affects the workability of the mix. To design the any grade of concrete we require to follow these 11 steps as per IS: 10262: 2009

DATA FOR MIX PROPORTIONING

The following data are required for mix proportioning of a all grades of concrete:

1. Grade designation

2. Type of cement

3. Target strength of mix proportion

4. Maximum water-cement ratio

5. Minimum cement content

6. Workability

7. Exposure conditions as per Table 4 and Table 5 of IS -456

8. Maximum temperature of concrete at the time of placing

9. Method of transporting and placing

10. Type of aggregate

11. Maximum cement content; and

12. Whether an admixture shall or shall not be used and the type of admixture and the condition of usc.

Step 1: Grade designation

First we need to conform grade of concrete. The grade of concrete is chosen based on the strength requirement and based on the place of work and loads coming on to the structures where this concrete is going to use. Basically we have 2 different mix

1. Nominal mix

2. Design mix

step 2: Type of cement

The mix design depends on the bonding materials which are used in the concrete. In general we can adopt some special cementitious materials depends on the requirement and to adopt Echo-friendly concrete "like partial replacement of cement".

The reaming steps explained in the design mix procedure to view the reaming steps click on the above mix types

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CONCRETE MIX DESIGN for all grades OF CONCRETE

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