CONCRETE MIX DESIGN

Introduction: There are used different techniques and to make concrete mix designing. These techniques are most benefits for the concrete mix design. Usually, some methods are using under here.

1. Arbitrary Method.

2. Minimum Voids Method.

3. Maximum Density Method.

4. Fineness Modulus Method.

5. Water Cement Ratio Method.

1.Arbitrary Method of concrete Mix Design: In the arbitrary method of concrete mix design is supposed to do quantity voids in fresh concrete that the voids of course aggregate will full fill by the fine aggregate. So as the fine aggregate will be equal to the voids quantity of course aggregate. The cement quantity is used according to given strength of concrete. It is maintained a ratio between cement and quantity. Just like that,(1:1),(1:1.5),(1:2),(1:3)and (1:4) etc.

2. Minimum void method of concrete mix design: In this method this is supposed that some fine aggregates to use more than the voids quantity of course  aggregate as result voids quantity will be minimum. If the cement quantity  more use than the voids quantity of fine aggregate  the voids quantity will be minimum.

3. Maximum density method of mix design: Maximum density method is called also trial mixture method. It is tried to get minimum volume from different concrete components to mix in various ratios according to this technique.

4. Fineness modulus method of mix design: To do fine the components of this technique is called also sieve analysis method. According to this technique there is analyzed to prepare different ratio samples of fine aggregate and course aggregates by sieve and find their fineness modulus.

5. Water cement ratio method of mix design: To do find the concrete design and for the given concrete strength is find by water ratio graph. According to using of concrete to choose fineness modulus and then concrete is prepare  according to this ratio. After that, to find its strength.