2/15/2014 Mix Design For M35 Grade Of Concrete

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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+ 1.651.91

= 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

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2/15/2014 Mix Design For M35 Grade Of Concrete

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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

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:

Units Kg/ M3

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

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

More Entries :

Concrete Mix Design M 20

Grade Of Concrete

M 15 Mix Designs as per IS-10262-2009

Mix Design M-50 Grade

M-20 Mix Designs as per IS-10262-2009M-25 Mix Designs as per IS-10262-2009

M-30 Mix Designs as per IS-10262-2009

M-35 Mix Designs as per IS-10262-2009

Mix Design M-40 Grade

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

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MOHAMED SITTHIK February 7, 2013 at 6:47 am

NOT SUITABLE ASTM METHOD IS DIFFERENT

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ashok March 2, 2013 at 11:39 pm

sir.

please give the definition and mix ratio for m30 grade concrete

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

its very coarse for pumping

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Franklin ADE April 24, 2013 at 4:46 am

What grade of cement was used?

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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.

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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

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2/15/2014 Mix Design For M35 Grade Of Concrete

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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

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vasant Ajmeri February 3, 2014 at 4:17 am

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

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