Mix Design M-50 Grade
Posted in Mix Design |
Email This Post
The mix design M-50 grade (Using Admixture –Sikament) provided here is for reference purpose only. Actual site conditions vary and thus this should be adjusted as per the location and other factors.
Parameters for mix design M50
Grade Designation = M-50
Type of cement = O.P.C-43 grade
Brand of cement = Vikram ( Grasim )
Admixture = Sika [Sikament 170 ( H ) ]
Fine Aggregate = Zone-II
Sp. Gravity
Cement = 3.15
Fine Aggregate = 2.61
Coarse Aggregate (20mm) = 2.65
Coarse Aggregate (10mm) = 2.66
Minimum Cement (As per contract) =400 kg / m3
Maximum water cement ratio (As per contract) = 0.45
Mix Calculation: -
1. Target Mean Strength = 50 + ( 5 X 1.65 ) = 58.25 Mpa
2. Selection of water cement ratio:-
Assume water cement ratio = 0.35
3. Calculation of water: -
Approximate water content for 20mm max. Size of aggregate = 180 kg /m3 (As per Table No. 5 , IS : 10262 ). As plasticizer is proposed we can reduce water content by 20%.
Now water content = 180 X 0.8 = 144 kg /m3
4. Calculation of cement content:-
Water cement ratio = 0.35
Water content per cum of concrete = 144 kg
Cement content = 144/0.35 = 411.4 kg / m3
Say cement content = 412 kg / m3 (As per contract Minimum cement content 400 kg / m3 )
Hence O.K.
5. Calculation for C.A. & F.A.: [ Formula's can be seen in earlier posts]-
Volume of concrete = 1 m3
Volume of cement = 412 / ( 3.15 X 1000 ) = 0.1308 m3
Volume of water = 144 / ( 1 X 1000 ) = 0.1440 m3
Volume of Admixture = 4.994 / (1.145 X 1000 ) = 0.0043 m3
Total weight of other materials except coarse aggregate = 0.1308 + 0.1440 +0.0043 = 0.2791 m3
Volume of coarse and fine aggregate = 1 – 0.2791 = 0.7209 m3
Volume of F.A. = 0.7209 X 0.33 = 0.2379 m3 (Assuming 33% by volume of total aggregate )
Volume of C.A. = 0.7209 – 0.2379 = 0.4830 m3
Therefore weight of F.A. = 0.2379 X 2.61 X 1000 = 620.919 kg/ m3
Say weight of F.A. = 621 kg/ m3
Therefore weight of C.A. = 0.4830 X 2.655 X 1000 = 1282.365 kg/ m3
Say weight of C.A. = 1284 kg/ m3
Considering 20 mm: 10mm = 0.55: 0.45
20mm = 706 kg .
10mm = 578 kg .
Hence Mix details per m3
Increasing cement, water, admixture by 2.5% for this trial
Cement = 412 X 1.025 = 422 kg
Water = 144 X 1.025 = 147.6 kg
Fine aggregate = 621 kg
Coarse aggregate 20 mm = 706 kg
Coarse aggregate 10 mm = 578 kg
Admixture = 1.2 % by weight of cement = 5.064 kg.
Water: cement: F.A.: C.A. = 0.35: 1: 1.472: 3.043
Observation: -
A. Mix was cohesive and homogeneous.
B. Slump = 120 mm
C. No. of cube casted = 9 Nos.
7 days average compressive strength = 52.07 MPa.
28 days average compressive strength = 62.52 MPa which is greater than 58.25MPa
Hence the mix accepted.
We are thankful to Er Gurjeet Singh for this valuable information.
April 10th, 2009 at 2:42 pm
it is very use full to my study
April 15th, 2009 at 5:01 am
Mr Gurjeet,
On what basis you have considered admixture is giving 20% water reduction.
have checked that?
What is the workability, wet density & strength you got?
April 15th, 2009 at 10:21 am
Dear sir we are using M:40 and M:60 with OPC cement, is it possible to achive M:40 with PPC cement.
April 16th, 2009 at 9:30 am
Dear Gurjeet Singh
Can I please know which part of India are u working??I’ve been in Delhi where v had to design M50 grade. We used tosham aggregates and had to add cement @ 440 kg per cu.m. Its interesting u achieved in just 422kgs. congrats
April 17th, 2009 at 4:40 pm
Hi Dear Sir,
Mehul Waghadiya Hear, iam technical manager for GTH company,
Please give me a idea or reference for Conducting and Casting of Dry lean concrete at Lab and how to calculat this design mix and how to calculate the proportion.
Thanking You
April 22nd, 2009 at 10:56 am
Is it anybody have mix design of M70 Concrete
May 6th, 2009 at 8:39 am
what is the sp.grvity of concrete? hw it is calculated?
May 6th, 2009 at 5:51 pm
Hi to all my dear sirs
? m n Turkey and I w?ll start my lessons after 3 months. I want to b a super eng?neer. So I want some adv?ces from u teachers and some lessons from u.
w?sh u all the best
May 6th, 2009 at 6:01 pm
I forgot to say that I want to b c?v?l eng?neer. I m from from Afghan?stan I came here for studay?ng.
May 13th, 2009 at 10:06 am
Dear sir,
It is very useful for Practcal experiences.
Regards,
PRABHU.
May 31st, 2009 at 9:05 am
i want more infromation testing on cement
June 25th, 2009 at 11:42 am
if we want to use Silica Fume + GGBS to improve the durability (ISAT.RCP Penetration …)have you got any suggest of the % concrete mix with OPC
June 26th, 2009 at 4:47 am
Dear sir,
It is very useful for Practcal experiences.
Regards,
Nagesh.
July 20th, 2009 at 8:53 am
It is very useful for practical .
what i want to known how u assume water cement ratio 0.35.
July 29th, 2009 at 5:28 am
Dear sir,
It is very useful for Practcal experiences.
S K Singh
August 11th, 2009 at 11:49 am
I AM DESIGNING M-50 CONCRETE FOR PRESTRESSED MEMBER, WHICH NEED EARLY STRENGTH OF 15mpa IN 24HRS, MIN. CEMENT SHOULD BE 400KGS/CUM, CLIENT REQUIREMENT IS TO MAINTAIN A CEMENT QTY OF 470KGS BUT IS456-2000 DIDNOT PERMIT THAT PLEASE GIVE ME SOLUTION
August 21st, 2009 at 2:55 pm
Dear sir,
I am very thankful for your valuable solution for its contents.
September 2nd, 2009 at 3:41 am
sir,
i would like to know how calculate 1:2:4,1:2:3 & 1:1.5:3
1 cu.mtr concretes required cement,sand,aggregate & water
etc.and also i need howmany grade of concrete mix normaly
used (Like m15,m20,m50 etc).
thank you……….(HAPPY ONAM)
September 11th, 2009 at 7:53 am
thank you gurjeet to tell us about this importent information.
September 13th, 2009 at 1:55 am
i want to know whether extrapolation of sbc test values conducted on a plate size of (width)1.50m can extrapolated to the actual footing size of a bridge (major)abutment
September 27th, 2009 at 2:29 pm
Sir,
It is very useful to me. I am working in a PSC sleeper industry and we produce PSC Slab of 6.1m span also.
thank you and wishing you a very happy dasahra.
October 5th, 2009 at 3:49 pm
It is very useful to my study . I am studying in B.E., (civil)
November 3rd, 2009 at 9:20 pm
hi
this is MKC
It is very wonderful see to your mix design.But still some of the things are missing there that u are preparing ur mix design by considering some of the indian standard.
In any IS will not say 20% reduction of water and in the ending stage increasing 2.5%
November 13th, 2009 at 3:45 am
Dear Gurjeet Singh
How it is possible
on Assume water cement ratio = 0.35(only 20% water reduction
according aginest superplatiser) & Cement Content 422 Kg/m3
u have acchived strength of M-50 with Micro Silica ?
Plz. reviwe it as u feel comfort
November 13th, 2009 at 8:01 am
hi
it is very good to see u mix design.
i have one question for u, if i used cement of grade 53 – o.p.c inseded of grade 43 -o.p.c used , we want to used fly ash and 400 k.g of cememt, can you give us the detail mix design for M-50 grade of concrete.
November 13th, 2009 at 10:31 pm
Hi, As we are providing plasticizers which means we are increasing the plasticity or fluidity of the concrete. So we can reduce the amount of water required. It is basically done to increase the workability which itself reduce the amount of water required. If we don’t use plasticizer then the amount of water will be increased so as to get the desired workability. And for starting the mix design we have to assume some water cement ratio so as to calculate the quantities of the cement and water.Depending upon the amount of workability required and the site conditions we assume it.
Please let me know if u still need any clarification
Yes it is true we have acheived M-50 strength with with 422kg cement amount.
please elaborate your question regarding acheiving strength with micro silica
December 19th, 2009 at 9:23 am
sir v r doing a project by using M50 grade of concrete, OPC 43grade.
Without using any admixtures. can u pls tell me how to calculate the
water cement ratio and full details about the mix design.
Thank u
December 22nd, 2009 at 10:24 am
sir,
we are constructing a road with dry Lean concrete(150 mm thk. top layer over a 200mm brick soling) , 13 km. long in sundarban island.pls. guide us on the matter that how to do the rolling over DLC with a 8 ton static roller and how to determine the OMC of the DLC.
Thank u.
January 16th, 2010 at 12:08 am
if you could please tell me the number 1 and 2 aggregate to mm i mean nubmer 1 aggregate is equel to ?mm
January 20th, 2010 at 2:15 pm
if you could please me give more tip regarding the mix.
February 6th, 2010 at 12:37 pm
sir
these are very good notes but sir i want that it should be gernal. because if you sent me gernal notes for concrete mix design i will be very thankful to you for this kind action
thanks