Why Does Concrete Crack?
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- Опубликовано: 8 сен 2024
- Why does concrete crack? There are a few causes of cracks in concrete, but there are two main reasons why this happens. One reason concrete cracks happens to new concrete that is curing. Another reason cracks occur is when concrete is forced to flex or move. Concrete is not flexible and will crack or break when this type of force is applied.
When concrete is mixed, it has a bunch of water in it which kicks of the actuation process, or the curing of the concrete. Soon after cement powder is mixed with water, it begins the process of hardening or setting up. Once it is placed and left to cure, that water content is quickly reduced. This water loss causes the concrete to shrink and this shrinkage can cause cracks. Wet curing the new concrete can help avoid these early developing cracks. Cutting control joints into the concrete also encourage it to crack in a controlled way and where you want it to happen. It is not guaranteed to crack in the control joints, but again, this can help avoid these early cracks.
Concrete is very strong, when you are speaking of compressive strength (having weight applied on supported concrete - like a driveway). It is not very strong when you are speaking of the tensile strength (spanning a gap with weight applied - like a bridge). To increase the tensile strength of concrete, steel is embedded in it as reinforcement.
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Yes, it is helpful. I am a fresh nood in the field. Thank you for your channel.
Thank you so much for this informative video 🙏
I have a couple video requests, thinking maybe you are like the concrete D J, taking requests... LOL. I had thought of soldering tin cans, cutting them up, etc, to use as an armature. Then I saw 1 can just sitting around had rusted. So #1. Armatures. What can you use as armatures? Does rust matter? Could I prime the tin cans? I know your videos for the large planter, table, etc, so I've seen some of what you've done with plastic buckets; (I've been collecting plastic containers for this). Are there any alternatives to use instead of lath for smaller items? maybe chicken wire. #2. Building up concrete layers for hand building. I see some people with youtube videos i don't trust. You are a good channel. But they like do some odd things building up layers. It's my understanding wet concrete doesn't stick to concrete already curing. I need info right away though, so not sure if i can wait. You have great videos.
Also, I saw your video on recommended materials... which you included thinset. I could use info on using that... when, where, why, how. I really see my designs will involve joining some separate parts... like I was thinking of having steel wire embedded & sticking out, to solder or weld, depending on thickness. (I had thought you don't want to let metal show between concrete sculpture parts... but have since seen some world famous sculptures are built with a middle metal section showing)... & believe I could use thinset to help join cured concrete parts? where wire / steel rod won't be exposed
Good morning sir hope you are fine
I have a question sir can you make a detailed video about baking soda use in concrete
I saw some people claiming that it works in quick setting and workability
How about in the winter when water is absorbed into the concrete then freezes?