M-20 Mix Designs as per IS-10262-2009

By
Raj Mohammad Khan

Following table shows the M-20 Mix Designs as per IS-10262-2009, hope this helps all civil engineers here

M-20 CONCRETE MIX DESIGN
As per IS 10262-2009 & MORT&H
A-1	Stipulations for Proportioning
1	Grade Designation	M20
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)	250 kg/m³
5	Maximum Water Cement Ratio (MORT&H 1700-3 A)	0.5
6	Workability (MORT&H 1700-4)	25 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/m³
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	Not Used
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)	30N/mm²
2	Characteristic Strength @ 28 days	20N/mm²
A-4	Selection of Water Cement Ratio
1	Maximum Water Cement Ratio (MORT&H 1700-3 A)	0.5
2	Adopted Water Cement Ratio	0.5
A-5	Selection of Water Content
1	Maximum Water content (10262-table-2)	186 Lit.
2	Estimated Water content for 25 mm Slump	145 Lit.
3	Superplasticiser used	nil
A-6	Calculation of Cement Content
1	Water Cement Ratio	0.5
2	Cement Content (145/0.5)	290 kg/m³
		Which is greater then 250 kg/m³
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	65.00%
	Adopted Vol. of Fine Aggregate ( 1-0.65)	35.00%
A-8	Mix Calculations
1	Volume of Concrete in m³	1.00
2	Volume of Cement in m³	0.09
	(Mass of Cement) / (Sp. Gravity of Cement)x1000
3	Volume of Water in m³	0.145
	(Mass of Water) / (Sp. Gravity of Water)x1000
4	Volume of Admixture @ 0% in m³	nil
	(Mass of Admixture)/(Sp. Gravity of Admixture)x1000
5	Volume of All in Aggregate in m³	0.763
	Sr. no. 1 – (Sr. no. 2+3+4)
6	Volume of Coarse Aggregate in m³	0.496
	Sr. no. 5 x 0.65
7	Volume of Fine Aggregate in m³	0.267
	Sr. no. 5 x 0.35
A-9	Mix Proportions for One Cum of Concrete (SSD Condition)
1	Mass of Cement in kg/m³	290
2	Mass of Water in kg/m³	145
3	Mass of Fine Aggregate in kg/m³	696
4	Mass of Coarse Aggregate in kg/m³	1429
	Mass of 20 mm in kg/m³	1029
	Mass of 10 mm in kg/m³	400
5	Mass of Admixture in kg/m³	nil
6	Water Cement Ratio	0.5

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