Mix Design For M35 Grade Of Concrete

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 +(F_a/ Sp. Gr.* P_f)}

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

Where C_a= Coarse Aggregate Content

F_a= Fine Aggregate Content

P_f = 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 +(F_a/ 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 +(C_a/ 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.

Hiten Says:
September 1st, 2009 at 11:20 am

please send me what’s the procedure for casting the slab

Ir Felly Says:
September 9th, 2009 at 4:34 am

I need let you help me to be a very good engineer

ER. HIMADRI KISHORE DAS Says:
September 13th, 2009 at 3:43 pm

Sir, can I used Zone-IV sand for design mix of M35 having TMS-43.25

Siddharth Tandon Says:
October 12th, 2009 at 8:05 am

sir, the ratio of m20 grade is 1:1.62:3.4 and the ratio of m35 grade is 1:1.6:2.907
so if we use the ratio (1:1.5:3) whish grade is this

Fred Afrawuah Says:
October 21st, 2009 at 8:54 am

can u please send the systematic way of designing a concrete strength of M35 WITH A NOMINAL AGGREGATE SIZE of 26.5

mitul Says:
October 22nd, 2009 at 2:41 pm

this is of which method. which method is convenient?

Pujarini Ghosh Says:
October 23rd, 2009 at 11:59 am

why is it that the 600 micron sieve for zoning of fine aggregate given non-overlapping values whereas the others in the table have overlapping values?

a.b.c. Says:
October 26th, 2009 at 4:32 pm

senthil kumar Says:
November 1st, 2009 at 2:36 am

Dear Sir,

could you please tell me the difference between Indian standard M35 and Concrete used in Gulf M35

venith Says:
December 19th, 2009 at 1:01 am

m35 grade mix desin

shradha Says:
December 23rd, 2009 at 8:07 am

Dear sir,

could you please tell me that this concrete mix design of M-35 grade is to be used in vibrater table or
hydraulic machine.

thanks

Lokeswari Says:
December 29th, 2009 at 6:54 am

Could you please send the “INITIAL AND FINAL SETTING TIME OF READY MIX CONCRETE” FOR ALL THE GRADE OF CONCRETE.