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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.

please sir reply design of M30 M35 M40 on paver block/interlocking tyle 60MM thick

I want to know m40 grade Ratio for making 80 mm concreate paver block , so please send me details.

EXACT RATIO 1:1/5:3

sir, please specify the M 40 ratios approximately as per IS 10262:2009

How Calculate by volume. Please send email thanks

dear sir i want mauvel mix m40 grade of concrete in apartment building

sir iam planning to manufacture 80mm zig zag interlocking economy pavers to use in petrol pumps, with m40 strength,kindly suggest what is the ratio of cement:rock powder:6mm&8mm chips with how much hydraulic pressure is required. pl. suggest

Hello Sir, Please specify mix design of M40 with Fly ash & use OPC 53 grade

How to calculate mix design for interlock paving block M30?please explain me detail.send my mail

dear sir, how to design M:40 with cement 53 grade, crushed sand (different sieve no) and permissible admixture to pressure grout for micro piling.

dear sir, I want m:40 design with port land cement 53, crushed sand (sieve no.) and permissible admixture to be used by pressure grout for micro piling.

Pl send me M40 Grade of concrete cover block ratio

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 PCB40, Fly ash type F.

Thank you Sir

Sir,

I want to manufacture 60mm paver block.what will be the mix proportion of M30 by 6mm stone , sand and ppc 53grade cement and admixture

Dear sir

I am starting a concrete interlocking block and fly ash brick can you send me the correct mix design with fly ash for m3 of semi dry mix for the above mentioned products.

type mixer in my factory

Rolling pan mixehar

Warm Regards

Vikram Singh yadav

Can we design M45 by using 10 mm coarse aggregate as maximum aggregate size?