A video on basic types of concrete available to the public, and most important a video on a time limit to pouring the mixed batch/batches. The point is if I pour a huge square footage and I do it in sections how long do I have? I have heard and read, 2 hours but prefer an expert opinion.
Hi, Dr Ley, greetings from the UK. I found your statement 'strong is not always better' very relevant and interesting, however, in general, almost all RUclips videos of concrete design use relatively low strength such as 3 ksi ~ 4 ksi (20 ~30 MPa). So how would you support this statement you have made in this video? Many thanks!
Thanks for the comment. As humans we think that things that are stronger are better. This seems to creep into engineering. Many practicing engineers think that 60 MPa concrete is better than 30 MPa concrete. Heck, even cement in Europe is sold based on some target MPa. I think that is a bad practice. I think we need to think about what that cement will be used for. For me I want material that is durable and then also strong enough. I don't need extra strength. I just need enough and I want to focus on other properties that may be better such as making it more construct able, more durable, more sustainable, or more economical. Let me know if this makes sense.
Thank you for your reply! It makes perfect sense, I indeed agree with that we should decide the strength according to specific circumstances, rather than unifying the standard. It seems to be a stereotype that people think stronger is better, definitely need to change this mindset! Also, do you have any lectures on calculating durability and long-term creep of concrete buildings?
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Tyler you are the King of Concrete :))
hey buddy thankyou for your insight :) I found your channel by accident , BUT its was a gold mine of information :)
I love your lectures Dr. Ley
Thank you!
A video on basic types of concrete available to the public, and most important a video on a time limit to pouring the mixed batch/batches. The point is if I pour a huge square footage and I do it in sections how long do I have? I have heard and read, 2 hours but prefer an expert opinion.
You are a great teacher
Love your videos 👍✌
This helped me a lot with my project thank you.
Love your lecture from india
Thank you so much!
what you doing nowadays ?
Hi, Dr Ley, greetings from the UK. I found your statement 'strong is not always better' very relevant and interesting, however, in general, almost all RUclips videos of concrete design use relatively low strength such as 3 ksi ~ 4 ksi (20 ~30 MPa). So how would you support this statement you have made in this video? Many thanks!
Thanks for the comment. As humans we think that things that are stronger are better. This seems to creep into engineering. Many practicing engineers think that 60 MPa concrete is better than 30 MPa concrete. Heck, even cement in Europe is sold based on some target MPa. I think that is a bad practice. I think we need to think about what that cement will be used for. For me I want material that is durable and then also strong enough. I don't need extra strength. I just need enough and I want to focus on other properties that may be better such as making it more construct able, more durable, more sustainable, or more economical. Let me know if this makes sense.
Thank you for your reply! It makes perfect sense, I indeed agree with that we should decide the strength according to specific circumstances, rather than unifying the standard. It seems to be a stereotype that people think stronger is better, definitely need to change this mindset! Also, do you have any lectures on calculating durability and long-term creep of concrete buildings?
thanks can you please upload RCC design as per BS 8110
Thanks for the message. I think the methods are similar but the safety factors are a little different.
Very helpful
Thanks
Sir also make videos on one-way and two-way slabs...
am I the only one who noticed his booger?>
Sir, we follow the American ACI for concrete and ASCE for steel. So thanks for that. But we need videos in two ways slabs including joist system.
Thanks,
I agree that I should make a video about two way slabs.