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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

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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.

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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
  • Karthikeyan June 10, 2008 at 12:14 pm

    Thank you……………………………………

  • rajan June 14, 2008 at 11:48 am

    I found it very useful,

  • Marwan June 25, 2008 at 10:23 pm

    Will author tell us what is a typical use for concrete grade M35, in which members or which kind of structures it is mostly used.

  • admin June 26, 2008 at 3:37 am

    The mix design of Mix Design For M35 Grade Of Concrete for pile foundations provided here is for reference purpose only. Apart from this depending on the structural requirements it can be used for other components as well

  • MANOHAR CHERALA June 27, 2008 at 6:25 am

    GOOD

  • Akaash Vats July 9, 2008 at 7:18 am

    How can i ever thankyou for this
    tis a great ……………………

  • Manoj J Varghese July 30, 2008 at 10:30 am

    Thank you for the design,Please do clarify-standard deviation is seen as 1.91Mpa how did you assume that,the water content as 172kg. Is this all assumed.

  • admin July 30, 2008 at 12:09 pm

    No,its not assumed..It is taken from the respective codes. Please read it carefully 🙂

  • dileep August 5, 2008 at 4:51 pm

    Thanks a lot***********

  • Mukhtar August 10, 2008 at 9:49 am

    vary usefull guidline m35

  • ARNOLD V. MAGTULIS August 28, 2008 at 6:24 am

    IT IS A VERY USEFUL ,THANKS A LOT

  • Ajeet Singh August 29, 2008 at 8:44 am

    Very Usefull

  • m.s.jagannathan August 30, 2008 at 10:11 am

    very useful

  • Bajesh September 2, 2008 at 6:34 pm

    Pl send a mix for m30 with cement 340kg per m3

  • santhosh kumar v September 3, 2008 at 4:55 pm

    its useful to engineers form R&B Dept

  • cmex September 4, 2008 at 5:43 pm

    how to know the mix proportion of high strength concrete? target mean strength is 90 mpa n 100 mpa. pliz give me the mix proprotion. tq

  • sandeep verma September 10, 2008 at 4:59 am

    It is very valuable, i’m sarching the degin of concrete mix form college. thank for completing my *********

  • SUDHAKAR September 10, 2008 at 11:58 am

    its useful data for all civil engineers , wherever they are working, for QS’s this will help a lot

  • Thiru September 16, 2008 at 12:30 pm

    plz send me pavement Quality concrete(PQC)design mix specifation

  • Dr. Subba Rao.P September 19, 2008 at 9:27 am

    It is very useful…\
    Thank you

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