About 7 years ago I had a concrete pad poured as the base for a mortared brick walkway. After allot of research I did a burlap & plastic sheet wet cure. The contractor thought I was nuts. Great to see I made the right choice. Having a patio slab poured today and this contractor never heard of wet curing...I sent him the video :)
you all prolly dont care but does anybody know a trick to get back into an instagram account?? I was dumb forgot the login password. I appreciate any help you can give me.
@Dax Omari Thanks for your reply. I found the site through google and I'm waiting for the hacking stuff now. Looks like it's gonna take quite some time so I will get back to you later with my results.
This is literally the best video on concrete I have ever seen. It's nice to see guys with PHD's who actually know how to problem solve, and show their results from their testing. Science is pretty cool if done right. Thus, giving the best method to tackle a problem. If you are going to do something, why not do it right? The first time? And it's not expensive. Crazy. People don't know and people are lazy. Great video! If the Romans can do it 2,000 years ago why not today?
Although I'm an electrical engineer by training, I really enjoy the insight into the world of concrete you so generously share with us. Even though the knowledge I gain won't find any use outside of any DIY projects inside and outside of my house I still eagerly await your next video. Your passion for concrete and the energy you put into the content of this channel is truly in a class of its own. I would like to know more about surface finishing and some practical advice on how steel/glass/carbon-fibers can be used to replace steel rebars..
Thanks so much for the comment! I do a little electrical engineering in my research as well. I have so much respect for your profession and all that you have contributed.
@@TylerLey Yes, I thought I saw you carry a raspberry pi around in an previous video! I guess most of us with a deeply rooted interest in technology and engineering will only think it's good fun to visit the neighbors and check out what they are up to.
I've witnessed construction workers curing the floors of highrise building during construction. It's exactly how you said. If curing is so important, why aren't machines built to facilitate the process of curing. I saw construction workers put a thick cloth and pour some water on it before the ciment was fully dried. The way curing is done today involves too much manual work. Machines would do it more consistently with less labour. What about painting the concrete to make it more water-resistent? I've see how the city makes sidewalks and they don't cure it! The same goes for overpass pilliards! Guess who is paying the bills for these mistakes? Your video makes sense!
@@mytech6779It depends on the application and climate. A city sidewalk in Phoenix, Az (where I live) has much different requirements than a bridge deck in Detroit. Its not worth sending a crew to wet cure something like a sidewalk in a mild climate where it frankly doesn’t matter, our concrete doesnt disintegrate here and a chemical compound will produce a concrete product that hold up wonderfully for years. Other climates and applications require concrete that is more impermeable and justify the cost of better curing. I will say this video was surprising as to how much of a difference there is between compounds and wet curing. I will be changing my practices for certain applications for sure.
@@markdoumert The key to my prior statement is knowing that that the definition of "works great" is not: barely adequate for the least demanding application.
These videos are really giving an insight that it's not easy to do it right with concrete. Unfortunately many projects are very time constrained and want to go on with the project without delay because every day costs money in salaries and rental resources too. My first job was at a cement factory, so I have some connection to this world even if I work with something different today.
You are so right! However, if we can do something that is low cost that will double the lifespan of the concrete then I think we can convince people to do it. We need to get this message out to more people. We also need tools to measure this in the field. We are working on that as well. If people can see it is important then they are more likely to change it. You are so right though about time and money being so important.
Amazing results, just 3 days, doesn't seem like much to ask for such impressive results. I've watched all your videos, have you done one on the effect curing has on strength?
Wild Bill57 do you think this mostly applies to flatwork? And not walls? Or do I need to leave the walls up for 24 hour before I strip then wet cure for 3 days?
This applies to walls as well but it is a little different. See the video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-oWpTcXhOl6A.html Thanks so much for watching!!!
Bill, We are just starting to do research work on this topic. Look for some videos in the future. Some other people have done some nice work on it but the research was from the 1960's and our cements have changed a lot. Stay tuned!!!!
A+ Video and your Teaching abilities are wonderful, had great info on curing and how it affects concrete lifespan. Just got my concrete small patio done for hottub today in time to do wet curing but need info on that.
An excellent presentation. Unfortunately, most people that make the decisions figure that the problem wont show up until after they have moved on. They look at the immediate cost and don't worry about the future. Please keep doing the right thing. Good Luck, Rick
@@TylerLey The business schools need to look at long term cost not just a few years. I think that today's politicians are a lost cause. Most of my profs, undergrad and grad, were WWII vets who looked at the long term. Later, as a town engineer shared by 12 small rural towns, the selectmen were part time and mostly WWII vets who wanted things done right so that their grandchildren would benefit. By 1987, most of the vets retired and a new crop of young professional full time politicians took over and things went downhill. Good Luck to you young people. Rick
I am working on that now. We have some really sweet data coming. Right now I would answer that it is about 3 h after mixing. This will depend on the weather. That is the next thing to quantify.
SIR, PLEASE MAKE AN ATTRACTIVE VIDEO O INTERNAL CURING THE WHOLE REVIEW IN 15MIN LIKE THIS. I LIKE YOUR WORK YOU DO WITH CONCRETE. KEEP GIVING US INFORMATIVE KNOWLEDGE.
That part there at the very end gave me an idea.... An aeroplane, made of concrete!! All kidding aside, love your videos. Entertaining and informative all at once. My family had many generations of engineers in the past, even on the Panama Canal. I undoubtedly would have also been an engineer, were it not for an allergy to homework. So I am an armchair engineer. And I do fantastic eyeball engineering. ;)
Thank you - I will send to my know-it-all concrete contractor who did my driveway. After he left, I covered with plastic for 7 days spraying under plastic daily. Surface is good but have lateral various cracks already just a month after the poor with NO WEIGHT. Your channel is great - thanks. Just curious - is there any special treatment for beachside concrete jobs?
Thanks again Tyler. The educational value of your vids is second to none. So many times have I forwarded links to your channel for my junior engineers to learn simple basic principles of concrete, which they failed to absorb at uni, I should be charging and giving you a cut of the profits !!. Again, another great vid Tyler. 👍👍🇦🇺
Thank you so much. I am really glad you find them helpful. Please keep helping people improve in their concrete knowledge. I think it is the biggest challenge we have in our industry. This is why I make these videos. Thanks so much for sharing.
Two thumbs up. Excellent video. Curing concrete properly may halve future replacement/repair sales; maybe that's why this info isn't out there? Many thanks.
Clark, I think people just don't realize how important it is. Many people say it is important but not a lot of people do something about it. The owners need to start asking for more. Contractors can only give people what they ask and pay for.
I'm just curious how this would work for wet curing. Lets say I build out a small slab for a resident client and I use burlap and plastic for the curing. Would I then ask the homeowner to keep watering the slab or would I have to keep driving back and watering it to keep it damp? lol
How does casting concrete in a plastic mould such as a food contain affect curing? How do various kinds of moulding materials such as timber and composite materials like melamine affect curing?
I'm currently testing out styro/eps concrete. I assume the principle applies? Would immersing everything in water be desirable to cure all the blocks? Also, how soon after I put them into the forms do I start curing? Could I really just immerse the form immediately after?
Curing becomes more and more important because we will need to use cements with different compositions like CEMIII and SCM to reduce the carbon footprint. In general they are slower reacting than a OPC and require a lot more curing.
My question is if I pour a slab of concrete and immediately cover it with plastic how does that affect the strength in curing durability of that concrete
So, ( I’m a concrete novice ) if you had concrete poured into a vertical mold, the top ( exposed ) surface should be cured with wet burlap for at least three days. But the vertical sides, I guess you just leave the forms on the 3+ days ? Also, when pouring into vertical forms I assume this is done in layers - how thick should each layer be and how long should you wait b/f before pouring the next layer on top of the first ?
Does moisture or relative humidity effect CTE measurement? Why does AASHTO T336/CTE test require running the test while the sample submerged in water during testing? Unless they want to exclude the effect of moisture-related shrinkage, not sure!!. In reality, concrete is not really fully saturated so measuring CTE at room temperature or dry condition may represent the actual field behavior. Sorry, it is not related to the top. Thank you for your amazing presentation.
Andy, You keep the concrete wet. Usually we do this with wet cloth that is covered with plastic. Check these videos: m.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-uf64MFQ4nI0.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-8XApTsnDmgY.html
I don't understand. why there is a manufacture for concrete? the company who produce concrete? I think if you bought it from home depot, there is no additional service at all.
I don't think you "double" its lifespan by curing. That 60% is relative, not absolute. Curing saved 60% of 2.5% total mass loss. Meaning, the total mass loss when curing was 1% vs 2.5% when not cured. Much much better relatively, but still just a 1% gain in absolute terms. Depending the size of the project, it may make sense to care about that, or maybe not care about that.
I talked about that in some other videos. I think they are very useful and can supplement external curing but I don't think they can replace it. These materials are also challenging to get wet and have them stay wet during construction.
All i wanted to know was "what is a normal time for a 20 by 15 foot floor to dry. Should i put fans in the room with the new conceret floor......no idea what you are talking about in this video...
Dr. Ley thanks for another great video. I had always seen lithium silicate advertised as a surface densifier/hardener to be applied after curing was complete. Are these two types of different lithium silicate products, or the same product that could be used different ways?
That is a good question. From what I understand they are the same product that can be used in different ways. However, I am not an expert in this area and I only tested a narrow application. There is more information about the field performance in the paper in the notes section of the video. The short answer is that it performed the same as the lab data.
Curing concrete IS expensive if you're paying someone to do it. Paying multiple construction workers like $25 an HR to use a water hose every day adds up.
imo ? best you explain what to do or not to do once contactor has poured and left concrete formular unknown you try to impress by your school room knowledge
We use aluminium form to cast our walls at our project. And after 2-days we strip open the form to prep for the next level. What would be the best way to cure our walls?
I like this vedio so much. I love concrete. But i lost a big part of the vedio because my English is not good enough is There is any body could translate it into arabic please?
i can help you, i know arabic جب أن تتم العناية بصورة متقنة حتى تتم معالجة الخرسانة جيداً، وتحقيق أفضل قوة وصلابة.يتم هذا بعد أن يتم صب الاسمنت. يحتاج الأسمنت إلى الترطيب، التحكم في البيئة المحيطة لاكتساب القوة والتصلب بشكل كامل أمر ضروري. مزيج الإسمنت يتصلب مع مرور الزمن، في البداية يكون سائلاً ثم يصبح صلباً وإن كان ضعيفاً جداً، ويزداد قوة في الأيام والأسابيع التالية. بعد حوالي 3 أسابيع، عادة ما يتم التوصل إلى أكثر من 90 ٪ من قوته النهائية، على الرغم من أنه قد يلزم عدة عقود من أجل تعزيز هذه القوة. الاماهة والتصلب للخرسانة خلال الأيام الثلاثة الأولى أمر بالغ الأهمية.التجفيف السريع بصورة غير طبيعية والانكماش نتيجة لعوامل مثل التبخر بفعل الرياح عند الصب قد يؤدي إلى زيادة إجهاد الشد في الوقت الذي لم يحصل بعد على قوة كبيرة، مما يؤدي إلى مزيد من التشقق الناجم عن الانكماشات. يمكن زيادة القوة في وقت مبكر بابقائه رطباً لفترة أطول خلال عملية المعالجة. التقليل من الإجهاد قبل المعالجة يقلل من التكسر. تزداد قوة الخرسانة لمدة تصل إلى ثلاث سنوات
@@zazugee thank so much you really helped me. I am interested in concrete but my English language is not good enough to understand this video. I think we have to lean this information and teach.
