**CONCRETE MIX DESIGN (GRADE M60)**

**(a) DESIGN STIPULATION:-**

Target strength = 60Mpa

Max size of aggregate used = 12.5 mm

Specific gravity of cement = 3.15

Specific gravity of fine aggregate (F.A) = 2.6

Specific gravity of Coarse aggregate (C.A) = 2.64

Dry Rodded Bulk Density of fine aggregate = 1726 Kg/m^{3}

Dry Rodded Bulk Density of coarse aggregate = 1638 Kg/m^{3}

**Step-1**

Calculation for weight of Coarse Aggregate:

From ACI 211.4R Table 4.3.3 Fractional volume of oven dry Rodded C.A for 12.5mm size aggregate is 0.68m^{3}

Weight of C.A = 0.68*1638 = 1108.13 Kg/m^{3}

**Step-2**

Calculation for Quantity of Water:

From ACI 211.4R Table 4.3.4

Assuming Slump as 50 to 75mm and for C.A size 12.5 mm the Mixing water = 148 ml

Void content of FA for this mixing water = 35%

Void content of FA (V)

V = {1-(Dry Rodded unit wt / specific gravity of FA*1000)}*100

= [1-(1726/2.6*1000)]*100

= 34.62%

Adjustment in mixing water = (V-35)* 4.55

= (34.62 – 35)*4.55

= -1.725 ml

Total water required = 148 + (-1.725) = 146.28 ml

**Step-3**

Calculation for weight of cement

From ACI 211.4R Table 4.3.5(b)

Take W / C ratio = 0.29

Weight of cement = 146.28 / 0.29 = 504.21 kg/m^{3}

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**Step-4**
Calculation for weight of Fine Aggregate:

Cement = 504.21 / 3.15*1000= 0.1616

Water = 146.28 / 1*1000= 0.1462

CA = 1108.13 / 3*1000= 0.3690

Entrapped Air = 2 / 100= 0.020

Total = 0.7376m^{3}

Volume of Fine Aggregate= 1-0.7376

Weight of Fine Aggregate= 0.2624*2.6*1000= 683.24 kg/m^{3}

**Step-5**

Super plasticizer:

For 0.8% = (0.8 / 100)*583.53 = 4.668 ml

**Step-6**

Correction for water:

Weight of water (For 0.8%) =146.28 – 4.668 =141.61 kg/m^{3}

**Requirement of materials per Cubic meter**

Cement = 504.21 Kg/m^{3}

Fine Aggregate = 683.24 Kg/m^{3}

Coarse Aggregate = 1108.13 Kg/m^{3}

Water = 141.61 Kg/ m^{3}

Super plasticizers = 4.6681 / m^{3}

So the final ratio becomes

Cement : Fine agg (kg/m^{3}) : Coarse agg (kg/m^{3}) : Water (l/m^{3}): Superplasticizer (l/m^{3})

**1: 1.35 :2.19 :0.29 :0.8**

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This concrete mix design has been submitted to us by Natarajan. We are thankful to him for this valuable contribution.

### Kanwarjot Singh

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If you have a query, you can **ask a question here**.

Dear Mr. Natarajan,

As per IS specifications maximum cement from durability point of view is allowed up to 450 kg/m3. How we can increase above it & if increased what will be adverse effects of it. Also you were not specified the gradings of aggregates & shape, texture of coarse aggregate as it will play a dominent role in workability & placing of concrete.

Thank you.

Is this possible to reach the TMS of M-60 without using micro-silica and what is the possibilities of shrinkage and thermal cracks as IS 456-2000 says that we can’t exceed 450 kgs/cum without flyash. Please give me some solution

WHAT IS MAXIMUM LIMIT OF CEMENT/CUM FOR RCC AND PSC, IN IN ANY CASE WE CAN CROSS IT, IF YES WHAT WOULD BE THE CONDITIONS, PLEASE

sir,

can you give me the mixed proportions of plastering and for mortar

mixed designs in different mixing proportions.

Thank you sir.

sir,

ple give information about concrete mix because i work on this project.

sir

could u show me or send me the proccedure of the Indian standard design

sir,

could send me the procedure of mix design of pumpable concrete for (m25, m30).

thank you

I appreciate this design but grade of cement also have an important bearing on design. Can somebody give me complete details of a high strength mix design say M80 with 20mm aggregate/fine aggregate( specifying shape of aggregate)/ specifying grade and make of cement/ admixture etc.

Also provide test results of 1 day/ 3 days( if available ), 7 days, 14 days and 28 days cube styrength.

Pls. explane in step-2

1. “Void content of FA for this mixing water = 35%”

How to select mixing water %.

2. Adjustment in mixing water = (V-35)* 4.55

How to compute 4.55.

thank

—————————————————————————————-

Step-2

Calculation for Quantity of Water:

From ACI 211.4R Table 4.3.4

Assuming Slump as 50 to 75mm and for C.A size 12.5 mm the Mixing water = 148 ml

==================================================

! Void content of FA for this mixing water = 35% !

==================================================

Void content of FA (V)

V = {1-(Dry Rodded unit wt / specific gravity of FA*1000)}*100

= [1-(1726/2.6*1000)]*100

= 34.62%

===========================================

!Adjustment in mixing water = (V-35)* 4.55!

===========================================

= (34.62 – 35)*4.55

= -1.725 ml

Total water required = 148 + (-1.725) = 146.28 ml

I need to know the method of mix design procedure.

Friends, Mix Design is fine. I would like to share One information, if you want to reduce Cement content in M60 Just add 5% micro silica as

replacement of cement. You can easily get results with 420 kg of cement.

Pl send mix design parameters, proportions required for M-55 grade concrete with Super plasticizer,Data available

are Cement qty -350 Kg to 480 Kg /cum.W/c ratio required 0.39 to 0.40. Slump reqd : 25 to 30mm & Sp gravity of CA1 is 2.65 (20mm down size) ,CA2 (10 mm down size ) is 2.65 & Sp gr of fine agg is 2.55 (Zone II).

Steam cured for 11 to 12 hours cycle.

Please send me the information about preparation of M80 mix concrete and its strength after 7 and 28 days.

Friends,

Mix Design is good. I would like to share One information, from durability condition cement content is high, we can reduce the cement content by 60 Kg & blendind the flyash by 100 Kg. Thereby reduce temperature of concrete by 2 degree centigrdaes.

pls send mix design proportions required for M60 grade concrete(for long span bridge beam). and use silica fume as addmixture.

useful information

how to assume air voids in FA for this mix water is 35% (any ref. plaease)

Sir,

As per IS code what is maximum deviation for cube

strength? can you please explain?

Dear Sir,

Everybody suggested that for m-60 design the max size of coarse aggregate should be 12.5mm.

As part of my thesis,i need the M-60 mix design by using 20mm aggregates.

Can you please send me the M-60 mix design by using 20 mm downgraded aggregates.

S.G of C.A=2.79

S.G of F.A=2.703,zone-3

Admixture=Fosroc conplast sp 430

cement=ultratech-ppc

S.G of Cement=3.15

dry rodded bulk density of C.A=1650kg/m3

dry rodded bulk density of F.A=1620kg/m3

Dear all,

I have seen the datas provided @ M60 mix design; it was very interesting and very useful. Kindly please provide the mix design for M80. This is my humble request and it will be useful to all of us

sir plz send me the mix design of M60 , As my specifi garvity of Couarse aggreate is 2.7 and of fine agg is 2.64. This is my humble request and it will be useful to all of us