Professor- As you mentioned in ACI-211 part 1- it’s a guess to the development for trial batching- I have found within the engineering community that ACI-211 is gospel whereas it is truly just a guide- using a 6.8 sack mix is a high shrinkage mix- Most state DOT’s use 211 and explains to them that it’s a guideline is like talking to a wall- (i.e) the state of Oregon requires a certification test to even make mixes and requires that a certified person be present at a ODOT pour- the test requires variables and how to correct them in the field- it’s a nightmare- thanks for your continued efforts to educate the concrete industry-
This is a challenge! This is why education is so important. Thanks for the comment. I talked with Oregon DOT last week and I think they are starting to see that there are other ways to do this.
As per ACI 211.1-91(2002) there are two methods of preparing Mix Design: 1. Mass Based 2. Volume Based Can you do a video explaining the pros and cons of both? Much appreciated.
Hi badass, great video !! Please, can you tell if ACI 211 is available with every Kind Dmax coarse aggregate? Actually I'm a student in chemical engineering and I'm asked study the correlation between cement and amix (HWRA) so I need to formulate a good concrete Admix first... I really need help....
In what code or standard can I find for the following details: Water-cement ratio Cement factor Cementitious content Cement content Fly Ash content Coarse aggregates proportion
You had me a little confused at 4:30 when you initially said 335 pounds per cubic foot. Dang, that's some heavy water! Once you went back to the worksheet you changed to cubic yard which really helped.
Looking for a cement for boat building. 25 m Cat external hull pressure is 1.5MPa suggested Thickness about 25 mm hull width to length is 10% NACA0090 flat bottom. Height of Hull 5000 mm. Salt water and fresh water . Can not have steel .. wanting to use a chooper gun and spray gun with Basalt cop strand. Any hints ? Spray Layup on a SS fly wire mesh. over Wooden molds.
Thanks for this wondeful work, but please can I contact you, me and my friends are take the project at the department of civil engg and our graduation project is about the difference methods of mix design and we need some help
What is the connection between the rodded unit weight in using the specific gravity? If i remebered it right the calculation of specific gravity is base on volume of solids. While the calculation of the unit weight of that rodded density is base on a container meaning there is a void
I'm looking for a concrete of 37 Mpa 28 days moistened cube . My aggregates are these one : Fine aggregate: Sand 0/5 and 0/2 Coarse aggregate: 5/14 and 15/22
How to calculate the mass of SCMs (12:45)? Say if we use 30% of fly ash, will the mass of fly ash simply be 638*0.3 lb/cy? But in that case there will be some error in the entire mix design because the specific gravity of fly ash is way lower than cement. 638*0.3 lb of fly has higher volume than 638*0.3 lb of cement. How to address the problem?
hi guys! i’ve been told that fly ash class f is about 0.5 lb/cyd of cement, so after our water cement calculation, and our determination of how much cement we need, do you think using that (lb/cyd f fly ash = 0.5 lb/cyd cement) to figure out the total celebrations material?
Sure! I would use the Tarantula Curve Mixture design procedure. ruclips.net/video/9az5Gf2Jaus/видео.html I would use a w/cm of around 0.42 and a water reducer.
Psi? Inches? Pounds per cubit foot? What in the hell is going on here? The USA hadn’t changed over to the SI metric system yet? Or is this video from the 1960s ?
😂 i just started watching the video but you may be right there are a lot of inconsistencies in what he says and shown in the video. Human error I suppose but it’s free so I can’t complain much. I just try my best to understand his explanation 😅
Professor- As you mentioned in ACI-211 part 1- it’s a guess to the development for trial batching- I have found within the engineering community that ACI-211 is gospel whereas it is truly just a guide- using a 6.8 sack mix is a high shrinkage mix- Most state DOT’s use 211 and explains to them that it’s a guideline is like talking to a wall- (i.e) the state of Oregon requires a certification test to even make mixes and requires that a certified person be present at a ODOT pour- the test requires variables and how to correct them in the field- it’s a nightmare- thanks for your continued efforts to educate the concrete industry-
This is a challenge! This is why education is so important. Thanks for the comment.
I talked with Oregon DOT last week and I think they are starting to see that there are other ways to do this.
Thank you, Tyler you just saw my instructor Armen last week I asked him for your autograph because you are amazing
You are a great Dr . It is explained simply by you.
As per ACI 211.1-91(2002) there are two methods of preparing Mix Design:
1. Mass Based
2. Volume Based
Can you do a video explaining the pros and cons of both?
Much appreciated.
Thank you so much Dr. Tyler ley,
your the best
God bless you
Great presentation and to the point. Actually discusses this better than my prof did.
Thank you very much for this great presentation about concrete mix design..
Hi Tyler. i have one question. Mix design is required for lean Concrete? If no , can you tell me the clause of ACI.
You're killing me...
Looks like I'll hire a contractor to pour my garage floor. Hopefully he's at least as smart as you!👍
Kind of confusing or correct me if I misunderstand it but your unit in the weight column shows lb/cy yet you keep saying pcf🤷🏻♀️
Can you please confirm that finally the batch weights of aggregates are in SSD condition?
Hi badass, great video !! Please, can you tell if ACI 211 is available with every Kind Dmax coarse aggregate? Actually I'm a student in chemical engineering and I'm asked study the correlation between cement and amix (HWRA) so I need to formulate a good concrete Admix first...
I really need help....
Very good. Well done. Thank you very much.
you are the best. i love your videos so much
Thanks so much!
In what code or standard can I find for the following details:
Water-cement ratio
Cement factor
Cementitious content
Cement content
Fly Ash content
Coarse aggregates proportion
Thanks for this. Are the weight units correct? (Lb/cy). If just lb we can use 62.4 lb/ ft3 to get water volume.
Oh now I get it. The unit size we comparison is one block that is a cubic yard.
We have the same question but go back to 4:30 where he mentioned the correct unit is pcf NOT pcy.
You had me a little confused at 4:30 when you initially said 335 pounds per cubic foot. Dang, that's some heavy water! Once you went back to the worksheet you changed to cubic yard which really helped.
Thanks Rick!
Looking for a cement for boat building. 25 m Cat external hull pressure is 1.5MPa suggested Thickness about 25 mm hull width to length is 10% NACA0090 flat bottom. Height of Hull 5000 mm. Salt water and fresh water . Can not have steel .. wanting to use a chooper gun and spray gun with Basalt cop strand. Any hints ? Spray Layup on a SS fly wire mesh. over Wooden molds.
Thanks for this wondeful work, but please can I contact you, me and my friends are take the project at the department of civil engg and our graduation project is about the difference methods of mix design and we need some help
How can I focus on concrete mix design if I am also working in material submittals for new precast projects??
What is the connection between the rodded unit weight in using the specific gravity? If i remebered it right the calculation of specific gravity is base on volume of solids. While the calculation of the unit weight of that rodded density is base on a container meaning there is a void
Hi .
How use this method that you explained, for high performance concrete?
I want to thank u for this great work thank u so much...
I am glad you enjoy it! Thank you for watching and commenting.
I'm looking for a concrete of 37 Mpa 28 days moistened cube . My aggregates are these one :
Fine aggregate: Sand 0/5 and 0/2
Coarse aggregate: 5/14 and 15/22
You are awesome sir !
Thank you ❤
How to calculate the mass of SCMs (12:45)? Say if we use 30% of fly ash, will the mass of fly ash simply be 638*0.3 lb/cy? But in that case there will be some error in the entire mix design because the specific gravity of fly ash is way lower than cement. 638*0.3 lb of fly has higher volume than 638*0.3 lb of cement. How to address the problem?
You increase the amount of aggregate in the mix to get 27 cubic ft or 1 cy.
hi guys! i’ve been told that fly ash class f is about 0.5 lb/cyd of cement, so after our water cement calculation, and our determination of how much cement we need, do you think using that (lb/cyd f fly ash = 0.5 lb/cyd cement) to figure out the total celebrations material?
Thank you
Sir, you are awesome..... Thanks a lot......
sir do you have a tutorial on how to design a high strentgh concrete mix 6000psi (42mpa)? i do work prevously in a concrete batching plant
Sure! I would use the Tarantula Curve Mixture design procedure. ruclips.net/video/9az5Gf2Jaus/видео.html
I would use a w/cm of around 0.42 and a water reducer.
Hey great video! I have posted a video on the M20 concrete mix proportion as per the NEW IS code 2019.
Psi? Inches? Pounds per cubit foot?
What in the hell is going on here? The USA hadn’t changed over to the SI metric system yet?
Or is this video from the 1960s ?
😂 i just started watching the video but you may be right there are a lot of inconsistencies in what he says and shown in the video. Human error I suppose but it’s free so I can’t complain much. I just try my best to understand his explanation 😅