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The mix design M-40 grade for Pier (Using Admixture – Fosroc) provided here is for reference purpose only. Actual site conditions vary and thus this should be adjusted as per the location and other factors.

Parameters for mix design M40

Type of cement = O.P.C-43 grade
Brand of cement = Vikram ( Grasim )
Admixture = Fosroc ( Conplast SP 430 G8M )
Fine Aggregate = Zone-II
Sp. Gravity Cement = 3.15
Fine Aggregate = 2.61
Coarse Aggregate (20mm) = 2.65
Coarse Aggregate (10mm) = 2.66
Minimum Cement (As per contract) = 400 kg / m3
Maximum water cement ratio (As per contract) = 0.45

Mix Calculation: –

1. Target Mean Strength = 40 + (5 X 1.65) = 48.25 Mpa

2. Selection of water cement ratio:-
Assume water cement ratio = 0.4

3. Calculation of cement content: –
Assume cement content 400 kg / m3
(As per contract Minimum cement content 400 kg / m3)

4. Calculation of water: –
400 X 0.4 = 160 kg Which is less than 186 kg (As per Table No. 4, IS: 10262)
Hence o.k.

5. Calculation for C.A. & F.A.: – As per IS : 10262 , Cl. No. 3.5.1

V = [ W + (C/Sc) + (1/p) . (fa/Sfa) ] x (1/1000)

V = [ W + (C/Sc) + {1/(1-p)} . (ca/Sca) ] x (1/1000)

Where

V = absolute volume of fresh concrete, which is equal to gross volume (m3) minus the volume of entrapped air ,

W = mass of water ( kg ) per m3 of concrete ,

C = mass of cement ( kg ) per m3 of concrete ,

Sc = specific gravity of cement,

(p) = Ratio of fine aggregate to total aggregate by absolute volume ,

(fa) , (ca) = total mass of fine aggregate and coarse aggregate (kg) per m3 of
Concrete respectively, and

Sfa , Sca = specific gravities of saturated surface dry fine aggregate and Coarse aggregate respectively.

As per Table No. 3 , IS-10262, for 20mm maximum size entrapped air is 2% .

Assume F.A. by % of volume of total aggregate = 36.5 %

0.98 = [ 160 + ( 400 / 3.15 ) + ( 1 / 0.365 ) ( Fa / 2.61 )] ( 1 /1000 )

=> Fa = 660.2 kg

Say Fa = 660 kg.

0.98 = [ 160 + ( 400 / 3.15 ) + ( 1 / 0.635 ) ( Ca / 2.655 )] ( 1 /1000 )

=> Ca = 1168.37 kg.

Say Ca = 1168 kg.

Considering 20 mm : 10mm = 0.6 : 0.4

20mm = 701 kg .
10mm = 467 kg .

Hence Mix details per m3

Cement = 400 kg
Water = 160 kg
Fine aggregate = 660 kg
Coarse aggregate 20 mm = 701 kg
Coarse aggregate 10 mm = 467 kg
Admixture = 0.6 % by weight of cement = 2.4 kg.
Recron 3S = 900 gm

Water: cement: F.A.: C.A. = 0.4: 1: 1.65: 2.92

Observation: –
A. Mix was cohesive and homogeneous.
B. Slump = 110mm
C. No. of cube casted = 12 Nos.
7 days average compressive strength = 51.26 MPa.
28 days average compressive strength = 62.96 MPa which is greater than 48.25MPa

Hence the mix is accepted.

We are thankful to Er Gurjeet Singh for this valuable information.

### Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

selva says:

Sir please send a concrete mix design for M15, M25, M30

Thanks
E. Selva

vakho says:

Dear Sirs!
Please, send me a concrete mix disign for B-22,5; B-25; M-25;

Thanks
Vakho

John Smith says:

Dear Sir
I want to make a brick wall of lenght 140m, height 1m and thickness 230mm. How can I calculate the material required to make it.

vijayreddy says:

sir please send me a concrete mix design for M15,M20,M45

Gurbinder Singh says:

Dear sir,
I shall be thankful to you

Dushyant D. Bhujbal says:

Dear sir,
Sir i have just started the manufacturing unit of paving blocks
and fly ash brick will you please send me the design for M15,M20,
M25,M30,M35,M40 & M45 BY USING
1. OPC 53 Birla super : 1440 kg/m3
2. Crush sand: 1730 kg/m3
3. Grit:1700 kg/m3
4. Dust:1650 kg/m3
5. 35 % fly ash

And design for making fly ash bricks

yuvaraj says:

sir send me a e-code book in steel,timber,concrete,concrete mix design,…etc

Ayappen sanjvii says:

Question .Can any one help give in volume the propotion. for design mix of 380kg cement,840kg sand 984kg of 20mm aggregate

Ayappen sanjivi says:

give the box sizes for mix design 380kg cement 840kg sand and 984kg 20mm aggregate.

gopi says:

i want m15 m25 and m30 mix design

Dear sir,
Sir i have just started the manufacturing unit of paving blocks
and fly ash brick will you please send me the design for M15,M20,
M25,M30,M35,M40 & M45 BY USING
1. OPC 53 Birla super : 1440 kg/m3
2. Crush sand: 1730 kg/m3
3. Grit:1700 kg/m3
4. Dust:1650 kg/m3
5. 35 % fly ash

And design for making fly ash bricks

This is a great site for Civil Engineers. Highly informative… Civil Engineering is ever dynamic..Good job guys… I promise to be active in this and share my own quota too..

MONOTOSH GHOSH says:

sir
pls send me the advice for mix propotion of concrete massonary (hollow& paving )block as per british or aci standard.
material for hollow block-1)10mm limestone2)5mmlimestone3)dune sand4)opc cement strength req.- 7 Mpa
Material for paving block-1)10mm gabro 2)5mm gabro 3)wash sand 3)opc cement
strength req. – 49 Mpa

Chirag says:

respected
Sir,
i have manufacturing unit of Paving Block (viabrater System)Rubber Mould Type
Please Can you give me the Design mix of concrete
strength req. – 40+

Chirag

BALJEET SANDHU says:

Dear Sir,
We are making interlocking pavers block of M35 gradeby using Binani
cement (OPC 43 Grade ). I have joined that plat newly there is not any design mix.
Material is coming from Yamunnagar ( Tajewala ).Can you give me design mix for M35.
I will be very thankfull to you

Please send me m30,m35 Mix design.Kinly give the volumatric details.

P.Shanmugam says:

Respected Sir,
Please send the Concrete mix design M-20 and M-30.

faisal abdulhameed says:

Sir,
I am starting a concrete block (hollow, solid, intyerlock & kerbstone), can you send me the correct mix design for m3 of semi dry mix for the above mentioned products.

thank you

Ashok Kumar Sharma says:

Dear sir,
Sir i have just started the manufacturing unit of paving blocks
and fly ash brick will you please send me the design for M15,M20,
M25,M30,M35,M40 & M45 BY USING
1. OPC 53 Birla super : 1440 kg/m3
2. Crush sand: 1730 kg/m3
3. Grit:1700 kg/m3
4. Dust:1650 kg/m3
5. 35 % fly ash

And design for making fly ash bricks,kerb stone
Thanking you
with regard
A.K.Sharma

aminudineey says:

sir, im having problem in designing a cement brick, it is Palm Oil fly ash cement brick,can u please help me an example to design it, and what is the range percentage of POFA required in order to get the best strength? Thank you sir.