It is manufactured in Concrete Batching Plant, or sometimes in Mobile Concrete Batching Plant. The Concrete Batching Plant automatically calculates the predefined quantity of materials needed to produces concrete accurately measured by their weight and thoroughly mixed, in the Concrete Batching Plant the concrete produced is of homogenous quality and controlled concrete.

- Indian Standard I.S: 10262-2009 method.
- Arbitrary Proportioning or Trial and Error method
- American Concrete Institute, ACI Committee 211 method
- Indian Road Congress, IRC 44 method
- Road Note 4 method
- Maximum Density and Minimum Voids method
- High Strength Concrete Mix Design method
- Mix Design of Pumpable Concrete
- British DoE method etc.

__STEP 1 – Understand the Requirements of the Problem or Situation :-__

__STEP 1 – Understand the Requirements of the Problem or Situation :-__

d) Any other special requirements like delayed setting etc.

__STEP 2 – Collect Data About the Available Materials for the Production of Concrete :-__

__STEP 2 – Collect Data About the Available Materials for the Production of Concrete :-__

__STEP 3 – Computation of Target Mean Strength of Concrete :__

__STEP 3 – Computation of Target Mean Strength of Concrete :__

^{2}

^{2}

^{2}

^{2 }for M30 Grade of concrete, k = 1.65 as per I.S. 456-2000 for 5% Tolerance, as adopted in the definition of Characteristics Compressive Strength, The value of ‘s’ first time design of M30 grade Concrete is 5 N/mm

^{2}[I.S.: 456-2000 Page 23 Table-8 or I.S.: 10262-2009 Page-2 Table-1]

^{2}

^{2 }strength.

__STEP 4 – Determination of the Free Water-Cement Ratio : __

__STEP 4 – Determination of the Free Water-Cement Ratio :__

^{2}from the particular curve of the grade of cement to be used, or it can also be found out from the generalized curve of BIS, and also consider the value of Maximum Free Water-Cement Ratio from the I.S.: 456-2000 [Page 20 Table-5] and take lower of those two values.

__STEP 5 – Determination of the quantity of Water required per cu.m. of Concrete :__

__STEP 5 – Determination of the quantity of Water required per cu.m. of Concrete :__

__STEP 6 – Determination of Cement Content :__

__STEP 6 – Determination of Cement Content :__

__STEP 7 – Calculation of Quantities of Coarse and Fine Aggregates :__

__STEP 7 – Calculation of Quantities of Coarse and Fine Aggregates :__

__STEP 8 – Arranging the Proportions of Different Ingredients :__

__STEP 8 – Arranging the Proportions of Different Ingredients :__

__Mix Proportions by Mass :__

__STEP 9 – Final Adjustments for Moisture Contents in Aggregates :__

__STEP 9 – Final Adjustments for Moisture Contents in Aggregates :__

In our example the coarse aggregate has 1% moisture in which 0.5% is absorbed into the aggregate it self, therefore the free water is (1%-0.5%) = 0.5%. And in the case of fine aggregate it has 4% moisture in which 1% is absorbed in it self, therefore free moisture is (4%-1%) = 3%.

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Very good method of teaching. Even fresher will get a sound knowledge & they will be able to do the work in field with confidence.