What is an M30 concrete mixture?

M-30 is grade of concrete where M is for mix of ( cement , sand and aggregate) and 30 is showing characteristic strength of concrete.

M-30 Mix Designs as per IS-10262–2009

Following table shows the M-30 Mix Designs as per IS-10262-2009, hope this helps all civil engineers here

M-30 CONCRETE MIX DESIGN

As per IS 10262-2009 & MORT&H

A-1

Stipulations for Proportioning

1

Grade Designation

M30

2

Type of Cement

OPC 53 grade confirming to IS-12269-1987

3

Maximum Nominal Aggregate Size

20 mm

4

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

310 kg/m

3

5

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

0.45

6

Workability (MORT&H 1700-4)

50-75 mm (Slump)

7

Exposure Condition

Normal

8

Degree of Supervision

Good

9

Type of Aggregate

Crushed Angular Aggregate

10

Maximum Cement Content (MORT&H Cl. 1703.2)

540 kg/m

3

11

Chemical Admixture Type

Superplasticiser Confirming to IS-9103

A-2

Test Data for Materials

1

Cement Used

Coromandal King OPC 53 grade

2

Sp. Gravity of Cement

3.15

3

Sp. Gravity of Water

1.00

4

Chemical Admixture

BASF Chemicals Company

5

Sp. Gravity of 20 mm Aggregate

2.884

6

Sp. Gravity of 10 mm Aggregate

2.878

7

Sp. Gravity of Sand

2.605

8

Water Absorption of 20 mm Aggregate

0.97%

9

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

1

Target Mean Strength (MORT&H 1700-5)

42N/mm

2

2

Characteristic Strength @ 28 days

30N/mm

2

A-4

Selection of Water Cement Ratio

1

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

0.45

2

Adopted Water Cement Ratio

0.42

A-5

Selection of Water Content

1

Maximum Water content (10262-table-2)

186 Lit.

2

Estimated Water content for 50-75 mm Slump

160 Lit.

3

Superplasticiser used

0.5 % by wt. of cement

A-6

Calculation of Cement Content

1

Water Cement Ratio

0.42

2

Cement Content (160/0.42)

380 kg/m

3

Which is greater then 310 kg/m

3

A-7

Proportion of Volume of Coarse Aggregate & Fine Aggregate Content

1

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

62.00%

2

Adopted Vol. of Coarse Aggregate

62.00%

Adopted Vol. of Fine Aggregate ( 1-0.62)

38.00%

A-8

Mix Calculations

1

Volume of Concrete in m

3

1.00

2

Volume of Cement in m

3

0.12

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

3

Volume of Water in m

3

0.160

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

4

Volume of Admixture @ 0.5% in m

3

0.00160

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

5

Volume of All in Aggregate in m

3

0.718

Sr. no. 1 – (Sr. no. 2+3+4)

6

Volume of Coarse Aggregate in m

3

0.445

Sr. no. 5 x 0.62

7

Volume of Fine Aggregate in m

3

0.273

Sr. no. 5 x 0.38

A-9

Mix Proportions for One Cum of Concrete (SSD Condition)

1

Mass of Cement in kg/m

3

380

2

Mass of Water in kg/m

3

160

3

Mass of Fine Aggregate in kg/m

3

711

4

Mass of Coarse Aggregate in kg/m

3

1283

Mass of 20 mm in kg/m

3

924

Mass of 10 mm in kg/m

3

359

5

Mass of Admixture in kg/m

3

1.90

6

Water Cement Ratio

0.42