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# Mix Design M-40 Grade

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

Grade Designation = M-40
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.

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## 174 comments on "Mix Design M-40 Grade"

azee says:

hi sir
i need to know the correct propotions for these grades of concrete,so please kind enough to send me the propotion of materials for this grades

satish says:

sub
i want to know how many types of design mix grades in making of cement concrete blocks and also its details i want

riyaz basha says:

sir, I want the BIS codes for hollow block concrete.Please sent it to my mail id.

Salil Sharma says:

Dear Sir,

if i wish to use 40mm MSA then what changes do we have to incorporate in M-40 Mix.

i want to know is there any comments in irc book for repair of concrete m 40 grade by bitumunus seal coat,please give me page no. in the book

RAJKUMAR. M says:

Dear sir,
we performed a C40 SRPC mix Design, but we are unable to get a correct slump. can you suggest me that correct mix proportions. and could you please mail me?
we used a water cement ratio 0.45 %

mohit says:

dear enterprenuer, i think u do not use any plasticizer,you can get best results by using any plasticizer .it will cost a very little cost but the results will be very good.

om prakash sharma says:

sir, i work for pre stressed concrete pole factory kindly explain correct ratio while using only 10/12 mm metal .what shall be the difference if ops53 is used in place of opc 43 please advice

a.selva says:

how to determine concrete materials tested at view ? give some tips

a.selva says:

at spot on seeing to determine cement , aggregrate are well qualified give some tips

hi
I am Adarsh shukla if i have a draine disine in village side over of pool of which have 100mm daya so what kinds of mix concreet disine we have to done the work of draine

neeraja says:

may i known the mix design for ultra thin overlay with fiber polypropylene( obtained from cement bags) .

eng.Abdulellah says:

Dear sir
plz send to me the mix design of hollow block

shemy s babu says:

dear sir
plz send to me the mix design of hollow block for my project work

imran khan says:

Dear All, please advise me the M-40 mix designe for the concrete paver block. thanks

V.S.INDUSTRIES says:

dear sir
pls send me mixing ratio of m-10 under ground drinage brick using material 10mm, 6mm,dust, cement, flyash and also advise me the mixing ratio for m-45

rakesh chaudhary says:

please send about rate analysis of M30,M40,M50,M60 grade of concerete

Ananth Kumar.M says:

Respected Sir Please send me the how to maintain the Conisistancy

neelam says:

please Tell me Laying tem of M40 Concrete.

A. suresh says:

I want how meny types of mix design and I want all type of mix design ratio

deepesh 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

janarthanan says:

sub
i want to know how many types of design mix grades in making of cement concrete blocks and also its details i want