Mix Design For M35 Grade Of Concrete

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The mix design for M35 Grade Of Concrete for pile foundations provided here is for reference purpose only. Actual site conditions vary and thus this should be adjusted as per the location and other factors.

Grade of Concrete : M35
Characteristic Strength (Fck) : 35 Mpa
Standard Deviation : 1.91 Mpa*
Target Mean Strength : T.M.S.= Fck +1.65 x S.D.
(from I.S 456-2000) = 35+ 1.65×1.91
= 38.15 Mpa

Test Data For Material:
Aggregate Type : Crushed
Specific Gravity
Cement : 3.15
Coarse Aggregate : 2.67
Fine Aggregate : 2.62

Water Absorption:
Coarse Aggregate : 0.5%
Fine Aggregate : 1.0 %

MIX DESIGN

Take Sand content as percentage of total aggregates = 36%

Select Water Cement Ratio = 0.43 for concrete grade M35

(From Fig 2. of I.S. 10262- 1982)

Select Water Content = 172 Kg

(From IS: 10262 for 20 mm nominal size of aggregates Maximum Water Content = 186 Kg/ M3 )

Hence, Cement Content= 172 / 0.43 = 400 Kg / M3

Formula for Mix Proportion of Fine and Coarse Aggregate:

1000(1-a0) = {(Cement Content / Sp. Gr. Of Cement) + Water Content +(Fa / Sp. Gr.* Pf )}

1000(1-a0) = {(Cement Content / Sp. Gr. Of Cement) + Water Content +Ca / Sp. Gr.* Pc )}

Where Ca = Coarse Aggregate Content

Fa = Fine Aggregate Content

Pf = Sand Content as percentage of total Aggregates

= 0.36

Pc = Coarse Aggregate Content as percentage of total Aggregates.

= 0.64

a0 = Percentage air content in concrete (As per IS :10262 for 20 mm nominal size of

aggregates air content is 2 %) = 0.02

Hence, 1000(1-0.02) = {(400 /3.15) + 172 +(Fa / 2.62 x 0.36)}

Fa = 642 Kg/ Cum

As the sand is of Zone II no adjustment is required for sand.

Sand Content = 642 Kg/ Cum

1000(1-0.02) = {(400 /3.15) + 172 +(Ca / 2.67 x 0.64)}

Hence, Ca = 1165 Kg/ Cum

From combined gradation of Coarse aggregates it has been found out that the proportion of 53:47 of 20 mm & 10 mm aggregates produces the best gradation as per IS: 383.

Hence, 20 mm Aggregates = 619 Kg

And 10 mm Aggregates = 546 Kg

To obtain slump in the range of 150-190 mm water reducing admixture brand SP430 from Fosroc with a dose of 0.3 % by weight of Cement shall be used.

Hence the Mix Proportion becomes:

Cem

W/C

Water

Sand

20mm

10mm

Admix

400

0.43

172

635

619

564

1.2

1

0.43

1.6

1.547

1.36

0.003

Units – Kg/ M3

Cement : Sand: Coarse Aggregates = 1 : 1.6 : 2.907

We are thankful to Er. Ishan Kaushal for this valuable information.

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Comments
  • mohamad mubin January 28, 2013 at 2:38 am

    thanks for this information , i want to know u considered S.D as 1.91

  • MOHAMED SITTHIK February 7, 2013 at 6:47 am

    NOT SUITABLE ASTM METHOD IS DIFFERENT

  • ashok March 2, 2013 at 11:39 pm

    sir.
    please give the definition and mix ratio for m30 grade concrete

  • hisham hasan alahmed March 31, 2013 at 5:34 am

    its very coarse for pumping

  • Franklin ADE April 24, 2013 at 4:46 am

    What grade of cement was used?

  • N.RAJ May 2, 2013 at 9:34 am

    sir
    i want the details about calculation of cement content.
    in case the cement content will be exceed 450 kg/m3 then what will be do sir. because IS 456:2000 says the cement content should not exceed 450 kg/m3.

  • Pallab Chakraborty July 20, 2013 at 6:42 am

    If it is M-40 or M-50 grade concrete then what will be the quantity of cement content, Sir?

  • JP October 31, 2013 at 4:05 pm

    Mix ratio for M35 concrete is 1:1.6:2.907. compressive strength is 35N/mm2 @ 28 days. 1 part of cement, 1.6parts of sand, 2.907 parts of coarse aggregate.
    Total sum of ratio=1+1.6+2.907=5.507

    cement=(1/5.507)*1.5=0.2723807 cubic-mtr =0.2723807*1440=392.228 bags
    sand=(1.6/5.507)*1.5=0.435809 cu-m
    agg.=(2.907/5.507)*1.5=0.7918 cu-m

  • vasant Ajmeri February 3, 2014 at 4:17 am

    As per IS code what is the maximum Qty. of Admixture used in concrete M35?

  • Sachendra kumar Tiwari April 3, 2014 at 3:06 pm

    how much quantity of sand,coarse aggregate and cement is used in m35 grade concrete? kindly reply to my comment or mail me for the same asap.

  • srinivas June 26, 2014 at 7:47 am

    Dear JP sir,
    you replayed 31-oct-2013 to Pallab. In that what is the value 1.5 and 1440. Please clear this.

  • pushpendra June 27, 2014 at 6:49 am

    hello sir i want to ask you explne me m 30, m35 , m40, m45, m50 ,how much the mix ratio

  • Post a comment

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