Sunday, July 10, 2011

M-30 Concrete Mix Design

M-30 CONCRETE MIX DESIGN

As per IS 10262-2009 & MORT&H

A-1

Stipulations for Proportioning

Grade Designation

M30

Type of Cement 

OPC 53 grade confirming to IS-12269-1987 

Maximum Nominal Aggregate Size 

20 mm 

Minimum Cement Content (MORT&H 1700-3 A)

310 kg/m3

Maximum Water Cement Ratio (MORT&H 1700-3 A) 

0.45 

Workability (MORT&H 1700-4) 

50-75 mm (Slump) 

Exposure Condition 

Normal 

Degree of Supervision 

Good 

Type of Aggregate 

Crushed Angular Aggregate 

10 

Maximum Cement Content (MORT&H Cl. 1703.2)

540 kg/m3

11 

Chemical Admixture Type 

Superplasticiser Confirming to IS-9103 

A-2

Test Data for Materials

Cement Used 

Coromandal King OPC 53 grade 

Sp. Gravity of Cement 

3.15 

Sp. Gravity of Water 

1.00 

Chemical Admixture 

BASF Chemicals Company

Sp. Gravity of 20 mm Aggregate 

2.884 

Sp. Gravity of 10 mm Aggregate 

2.878 

Sp. Gravity of Sand 

2.605 

Water Absorption of 20 mm Aggregate 

0.97% 

Water Absorption of 10 mm Aggregate 

0.83% 

10 

Water Absorption of Sand 

1.23% 

11 

Free (Surface) Moisture of 20 mm Aggregate

nil 

12 

Free (Surface) Moisture of 10 mm Aggregate 

nil 

13 

Free (Surface) Moisture of Sand 

nil 

14 

Sieve Analysis of Individual Coarse Aggregates 

Separate Analysis Done 

15 

Sieve Analysis of Combined Coarse Aggregates

Separate Analysis Done 

15 

Sp. Gravity of Combined Coarse Aggregates 

2.882 

16 

Sieve Analysis of Fine Aggregates 

Separate Analysis Done 

A-3

Target Strength for Mix Proportioning

Target Mean Strength (MORT&H 1700-5) 

42N/mm2

Characteristic Strength @ 28 days

30N/mm2

A-4

Selection of Water Cement Ratio

Maximum Water Cement Ratio (MORT&H 1700-3 A) 

0.45 

Adopted Water Cement Ratio 

0.42 

A-5

Selection of Water Content

Maximum Water content (10262-table-2) 

186 Lit. 

Estimated Water content for 50-75 mm Slump

160 Lit. 

Superplasticiser used 

0.5 % by wt. of cement 

A-6

Calculation of Cement Content

Water Cement Ratio 

0.42 

Cement Content (160/0.42) 

380 kg/m3

  

Which is greater then 310 kg/m3

A-7

Proportion of Volume of Coarse Aggregate & Fine Aggregate Content

Vol. of C.A. as per table 3 of IS 10262 

62.00% 

Adopted Vol. of Coarse Aggregate 

62.00% 

 

Adopted Vol. of Fine Aggregate ( 1-0.62) 

38.00% 

A-8

Mix Calculations

Volume of Concrete in m3

1.00 

Volume of Cement in m3

0.12 

 

(Mass of Cement) / (Sp. Gravity of Cement)x1000 

 

Volume of Water in m3

0.160 

 

(Mass of Water) / (Sp. Gravity of Water)x1000 

 

Volume of Admixture @ 0.5% in m3

0.00160 

 

(Mass of Admixture)/(Sp. Gravity of Admixture)x1000 

 

Volume of All in Aggregate in m3

0.718 

 

Sr. no. 1 – (Sr. no. 2+3+4) 

 

Volume of Coarse Aggregate in m3

0.445 

 

Sr. no. 5 x 0.62 

 

Volume of Fine Aggregate in m3

0.273 

 

Sr. no. 5 x 0.38 

 

A-9

Mix Proportions for One Cum of Concrete (SSD Condition)

Mass of Cement in kg/m3

380

Mass of Water in kg/m3

160

Mass of Fine Aggregate in kg/m3

711

Mass of Coarse Aggregate in kg/m3

1283 

 

Mass of 20 mm in kg/m3

924

 

Mass of 10 mm in kg/m3

359

Mass of Admixture in kg/m3

1.90

Water Cement Ratio 

0.42 

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