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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**

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 / m^{3}

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 / m^{3}

(As per contract Minimum cement content 400 kg / m^{3})

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/S_{c}) + (1/p) . (f_{a}/S_{fa}) ] x (1/1000)

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

Where

V = absolute volume of fresh concrete, which is equal to gross volume (m^{3}) minus the volume of entrapped air ,

W = mass of water ( kg ) per m^{3} of concrete ,

C = mass of cement ( kg ) per m^{3} of concrete ,

S_{c} = 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 m^{3} 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 m^{3}

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 **

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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.

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

Thanks

E. Selva

Dear Sirs!

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

Thanks

Vakho

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.

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

Dear sir,

Please could you arrange for more information about conc.mixes with british standrads and amareican stndrad

I shall be thankful to you

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

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

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

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

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..

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

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+

please i am waiting for your reply

Chirag

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.

Respected Sir,

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

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

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

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.