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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.

umesh says:

sir, i want the mix design for m40 concrete which is prepared by replacing 2% of cement by silica fume

N.K.Barve says:

Dear sir,

vivek says:

M20 M10 M15 M30

hasliza says:

sir, i want the mix design for m50 concrete which is quantity 400 m3 & m40 concrete which is quantity 500 m3

cloyd says:

Dear sir,
please give me the strength of different grade of concrete and the mix design for m40 concrete ( 500m3) , m50 concrete ( 600m3) , m60 ( 700m3) quantity. thank you

ankit says:

sir in the above article it has been given that 12 cubes are casted with 400 kg of cement..may i know the size of each cube??

sunil says:

150mm*150mm*150 mm

kaushal kumar singh says:

sir
sir i want to know about the increase of compressive sterngth in different grade what is the ratio the cement should less conumed

chandrashekara.P says:

With out Admixture is it possible to get M40 target strength? Ad mixture roles in concreat.

gsrao says:

how much cement required from m25 to m40,if we want to change the concrete mix in site immidiatly.gsrao

JAGAN NATH GOSWAMI says:

I’m extremely pleased to go thro these sites. I would love to study such designs often.

Vijay Savalia says:

Sir, we need a mix design to cast Interlocking paver blocks of M-50 Grade. We have three kind of material, (1) Stone Dust with 6 mm (2) 10-16 mm (3) 20 mm. We are using ultratech 53 grade cement. We have tried with 20 mm material, but the side finish of Paver block was not satisfactory. So now we are not using 20 mm but in this combination we could not get m-50 strength. So please suggest me the best mix design for this. It will be helpful for me. Thanking you, Regards,

anthony says:

sir,
plz give me the mix design ratio all cement for 43 grade.

johnny says:

dear sir,
please give me a table of your 10 mpa to 25mpa mixes.
thanking you.
i want to make concrete blocks to a certain standard.

abdul salaam says:

dear sir.
please conform me for the calculation of target strength send teh formula to me

Nilusha says:

plz give me the mix design ratio for grade 40

Mukesh Gohel says:

Pls. give me M-45 mix design…. in details.

GEETA CHANDBHANANI says:

Sir, we are making interlocking paver blocks of M40 grade by using cement of 53 grade, blast furnace slag, aggregate of 1/4 grade(6-8 mm) and dust. we are using rubber moulds and vibrator system for casting the paver blocks. Sir please send me the IS code for mix design of paver blocks.
Thank you sir

Give me M200 concrete mix design procedur.

DHAINJE RAJU says:

dear sir,
pls.give me the proportions of cement,sand,aggregate for m25,m30.m35,m40 ,m45,m50

RANDEEP says:

sir give me the cement ,aggreate and water ratio in M7.5, M15 ,M20, M25, M30, M35, M40

Dinesh 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