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Mix Design M-40 Grade

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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 / 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

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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.

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Comments
  • jamil December 7, 2015 at 7:03 am

    How Calculate by volume. Please send email thanks

  • MURUGAN.S January 2, 2016 at 2:20 am

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

  • PRAVEEN May 18, 2016 at 10:12 am

    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

  • Hansraj Pawar November 25, 2016 at 7:39 am

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

  • Zeyauddin January 17, 2017 at 2:30 am

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

  • Azimkhan and shirish shah January 25, 2017 at 12:56 pm

    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.

  • Azimkhan and shirish shah January 25, 2017 at 1:11 pm

    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.

  • dheeraj kumar February 2, 2017 at 9:32 am

    Pl send me M40 Grade of concrete cover block ratio

  • ??ng Khoa April 14, 2017 at 4:30 am

    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

  • Sourav pal April 18, 2017 at 3:12 pm

    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

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