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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.

If you have a query, you can ask a question here.

Sanjeev Tiwari says:

Dear sir,
Sir i have just started the manufacturing unit of paving blocks
brick will you please send me the design for M15,M20,
M25,M30,M35,M40 & M45 BY USING

Yash Kumar Sharma says:

Respected Sir,
Please send the Concrete mix design M-20,M-25,M-30,M-35,M-40,M-45,and
M-50.

Parwej says:

Please let me know the IS or any relavant code for the Design Mix of Heat Resistance concrete used in Steel Plant

dinesh kumar m says:

sir i need M15, M25, M30, M40, M50 mix designs for making paver blocks( interlocking pavers)
i using cement 53G opc and 6mm metal, sand and also quary dust. pls send me a mix design in
kg
thanks

amitava says:

Please give me a mix design of m25 m30 of kolkata region (zone 2)

manoj bhardwaj says:

M40 grade for interlock tiles how mauch cement ,send and gravel
requried send me detail. concrete design
thanks

husein hannouna says:

hi sir
I am starting a concrete block (kerbstone (curbstone),paver (interlock) ), can you send me the correct mix design for m3 of semi dry mix for the above mentioned products.
type mixer in my factory
alfelder eisenwerke

Harpreet Singh says:

Hi,

Kindly send the Ratio of Cement , Course and Sand in PCC & RCC in all available Grades

Also cement Water ratio of all Grades

E.g PCC M20 (1:4:8)
RCC M20 (1:1.5:3)

B//R
Harpreet Singh

V.C Sasi says:

Sir,

Kindly send the Ratio of PCC & RCC in all available Grades especially M30, M35,M40 and M45.

Regards,

Sasi

V.C Sasi says:

Sir,

Please give the mixing ratio of M25,M30,M35,M40 and M45 (eg M20 =1:1.5:3)

dinesh says:

Sir please send a concrete mix design for M15, M25, M30, M40 for paver manufacturing
unit we are using cement 53 O P C 6mm metal , sand / quary dust

ajay dubey says:

sir.pl send interlinking paves block design with high strength and paves block mix design with strength and cement 10mmaggregate sand ratio

Gerrit says:

DEar Sir Please give me a 40 m.p.a. mix desighn for pavement, concrete

0.40 says:

how much is the price per cubic

Pravin Chaudhari says:

Dear Sir,
Pls send the concrete Mix Design for 60mm Thich colorado interlocking Concrete paver blocks of M40 Grade

Regards,
Pravin

raja says:

pls send me latest mix design softwares and wat are the importance of admixtures using in concrete resist the fire….

raja says:

hello sir…
In recent days which admixture s used for fire resisting buildin…..wats de comparison bet

Steve Musundi says:

Dear Sir/Madam Kindly request for a design mix for Roller Compacted Concrete for pavement roads not exceeding 20 tonnes. The mix should include the use of fly ash as we intend to reduce the use of portland cement
Thank you

la pyae says:

How to calculate mix design for M45?please explain me detail.send my mail

sujani says:

sir,
we have to design M40
and it should be less weight for that what we have to do?