Dry Pour Concrete: How Deep Can you Make it?
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- Опубліковано 20 кві 2023
- Our last video with dry pour concrete using mixing inside the tube stirred up some controversy. Today we're testing a completely dry pour, no mix concrete sonotube to see how deep you can make dry pour concrete.
See the dry pour with mixing in the tube video here: • Dry pour concrete - ca...
#diyconcrete #diyconstruction
For everyone saying there wasn't enough water and/or a week wasn't long enough to wait, I cracked open a piece from a different dry pour project three weeks later (total of four weeks after pour). Check it out here:
When I do 3 foot deep fence post dry pours, I do a few important things differently:
Dry pour internet videos: Let's break this open after 15 minutes so I can publish the video already.
I don’t think you need to mist it if your not concerned about aesthetics. Just flood it
Thx for trying this but I'm not sure why people keep only estimating the amount of water used when they should be using the amount of water for each bag. For every bag of concrete, people SHOULD have a measured amount of water set aside to pour on the surface after the top layer firms. This is the only way to know how strong a dry pour can be because of actually using the correct amount of water for the entire process.
I see there are a few things that would have made this a success, I am NOT a professional but I do have experience with regular concrete. I noticed that when you started with the water that you were following instructions for a pad/large flat surface where you didnt want to upset the visual look. What I would suggest instead is to immediately add water and avoid the misting because this isnt 1-4in of material that needs water. This shoud have been watered down from the beginning so that the water had time to get to the bottom more evenly. Other than that I believe that letting it sit for 2 days after watering it that would have been a much better comparison.
I think for that particular shape, I would have just go full soak instead of waiting an hour between misting. Since the mix is a lot of sand, most of the water will drain off into the ground and whats soaked into the concrete will cure well. The crete will only accept as much moisture as it will absorb. The sand in the mix is the best draining medium. Of course a psi test afterward would test how strong the cure is. Crete will cure hard with just about any amount of moisture. Getting the correct psi depends on the amount of moisture, time, and evaporation rate. This is my uneducated guess based on sculpture work with crete.
The misting method only is used for 4 " to do that kind of pour you would have to totally mist it till it's totally drenched because that's to far for the water to reach the bottom at that point for strength you would have to stay and continually drench it
Awesome! Thank you for spending the time and money to conduct the test again as many viewers requested. The video was very informative. I was curious how much of the bottom of the tube had cured from contact with the ground, glad you showed that part. I am slightly curious how the test would have gone if the tube had been fully submerged - would the interesting to see if the cardboard would have been soaled over time etc. But that doesn't matter much as no one is going to wait that long to use a pilon.
A 19" slab? Who needs a 19" slab? As much as you tried to resist it i think for a foundation pillar you'd want to get the concrete in direct contact with the surrounding ground and have that soaked. My understanding is concrete is porous and water will slowly move through it Maybe you should do a slab pour where it goes from a few inches to a few feet thick, leave it a really long time - at least a month, if not several - during a time when there is plenty of moisture available to soak into the slab gradually. Then cut sections of the slab at various thickness and have them professionally tested.
2 days is not enough time to fully cure a 4 ft pillar
Good test now it's a dry pour test , i knew dry pour would not work for anything thicker than 6" . Even if it works mixing gives a better psi rating. Thank you so much for the test .
excellent science experiment ..
Sure if your building a 4 ft thick bomb shelter, bridge, high rise etc. dry pour no good. But for the small DIY home projects dry pour is fine.
The reason you were able to pull out the bolt and destroy the concrete, is you didn’t give it enough time to set up and harden. You can’t just do everything in 24 hours, you need six weeks of setup time for it to work.
For it to mix well dry pour is still mixed when you pour it but to make a tube you would have to totally drench it all the way through the difference is to make sure when doing this way is to totally drench it then come back in 1 hours and doing it again 1 hour drench 2 hours drench then fully water it let the water drain then do it again then repeat wait 2hours and drench one last time
6:46
thx!
Isn't the thinking with drypour that the cement will absorb water slowly over time? Since you isolated it from it's surroundings the only water it got was from the top and bottom. Is 2 days do you really think the cement got enough water from either direction even if every drop you put on it got absorbed?
You really should do this and let it sit outside for a month or so. Fence post seem to get really hard after being in the ground for a long time. Also consider the red bag fast setting quikrete mix which says on the bag that it can be dry poured.