Dry Pour Concrete vs Wet Pour Concrete - Strong Enough 

Next video - pur two identical cylindrical pieces of concrete (in a pickle jar), 1 wet pour, 1 dry pour, and after 2 weeks bring them to a concrete testing centre where they test the exact PSI etc. That video would get you millions of views since that's what everyone wants to know - the exact PSI difference

People are saying it because it will take money from them if more people start to dry pour everything instead of paying a concrete guy to do it for them.

LOL! I started laughing when you were showing off your nice concrete rack and then started laughing even harder when you realized what you were doing. 😂

The Romans used dry pour concrete when making piers and wharves. They'd fill a barge with dry mix, float it out to sea in the right place, and sink it. Seawater would hydrate it and so it's still there today.

"Strong enough" is exactly right in my opinion. Would love to see a part 2 with more durability testing because now I'm very curious!

This RU-vid concrete series has been like a gold rush for you (or perhaps a grey rush)!

Cement requires minimal water to begin the chemical reaction to form concrete. Once the chemical reaction starts, it cannot be stopped. Slowed, yes but not stoped. As the reaction peaks, additional water helps to cure the concrete. The longer concrete can be kept wet, the stronger the finish product. Concrete has approx 75% of its full strength in 7 days to approx 98% of its full strength in 28 days. In road construction, dry cement is being blended with base material and minimal water, it looks damp, and compacted. Proctors of this material can approach 100 with the right blend of cement, base and water. When doing this process, the prepared base needs to be wet. Flood it with water the night before placing the dry mix. The cement will draw the water up from the ground and the top misting will put water in on top. After you get a firm top, dont be afraid to mist it frequently. After 8 hours, keep the slab saturated. A sprinkler keeping the slab wet will make things easier. After 24 hours, keep the slab damp, especially on windy, hot and dry days for at least 7 days. If you can, 28 days curing will make the strongest concrete.

You’re hilarious bro. I’m loving this dry concrete method.

You can't break concrete by dropping it on dirt take a hammer to it that's the test or take to a concrete testing center

Funny vid! When doing dry pour you might pour a little ‘M’ type mortar over the dry mix which is rated at 2500 psi. This is basically cement without the big 1/2” - 1” rocks which will make it easy to give a smooth final finish with your paint roller. 2500 psi is sufficient for sidewalks, sheds, or other light work. Wet concrete workers are basically bringing the cement to the top to get their smooth finish when the trowel, thus their surfaces also have a lower psi rating as the rocks in there concrete give the mixture foundation type psi ratings.

Definitely will consider dry pouring a patio in the future. Not sure if it will hold up to winter freeze thaw cycles since it appears more porous. But exactly right about only needs to be strong enough. Great video.

Safe to say that site prep is key regardless of how you pour and maybe for foot traffic such as patios or sidewalks ect dry pour is definitely a viable option.

It's gonna be interesting seeing you learn how to build the rest of this shed, I'm definitely learning a lot.

The strength has always been in the lengthy cure times.

Thoroughly entertaining/ informational

Thank you for this! Please keep testing these samples until one of them breaks... I'd like to see if dry pour really is weaker.

These videos are just great. I have not laughed that hard in some time. Thanks!

How many bags did you use to pour all of those slabs? roughly how many bags per slab? and did the hardware store deliver that pallet for free?

Why didn't you break them apart, to see the inside, and if there is any difference between the two in the center?

What is the maximum thickness of concrete that can be done with this technique?

nice testing, strong enough for me !

You should make some type of yard or house art with concrete. _A friend bought some reusable molds online of skulls & made a dozen or more decorating around his hot tub area._ (I'm sure there are a bazillion different molds to choose from and, some could even be made useful.) ~ Some big headlights you've got at 4:35, you must be drinking BudLight!? (lol j/k) ~~ 8:53 car-jacks! ~~~ Make some small benches around your firepit and or boarder around your firepit? ~~~~ Anyway, how far are you away from Bradenton? (I used to go there to vacation in the '90s) And, how about Ona Florida? (Solomons Castle is a great place to visit and, maybe do a video on.) ~~~~~ Cheers from Indiana Paul! *James*

Those who say to not do this are the pros. You can't blame them because this will have an impact on their field as more and more people do slabs on their own with this relatively new way.

Dry pours are the future.

Concrete-experiment videos seem to be popular. Do more!

Outstanding!!!

this is interesting, i am start playing with dry pour concrete. This should be a series 😂

very much appreciated!!!

It's like MythBusters never went off the air

Brilliant !

heavy looking knockers

I sure would like to see the center of each to see how they compare....

Being a concrete guy from the 80's the engineering aspect was the more water you add to the concrete mix the weaker it becomes. I am predicting that the dry pour will be stronger than the wet pour. By how much we just won't know until your next video when you drop an old cannon ball or shot put at different heights. Looking forward to the next video. Subscribed. Looking to dry pour a slab for a shop in the desert and trailering my water in. It'll be a huge experiment. Hope it works. 🤠💪👍😁

For a smaller storage shed, this seems very much useable

Can you mount a pergola to dry pour

Ty kind sir. An open mind is a vastly undervalued asset.

Grass? You dropped them on grass? Will anything break when dropped on grass?

Renetto, the concrete man!

Strong enough, exactly right.

I like to dry pour BUT it is not a proven engineered method. Would you drive over a bridge that was dry poured? I know it’s a shed floor.

Your great ty 😅

You finally got your first viral video in your channel for a very long time ago

Pretty lame tests... Dropping them into dirt? Driving onto it with soft rubber tires, on dirt? Come on dude, drop them from equal heights onto something hard, like concrete. Also notice the dry pour one has way more voids and obvious flaws compared to the wet pour? That's weakness.

RU-vidr..."MAN about TOOLS" has a series of videos on how to make a concrete garden box. In the series he soaked the concrete segments for 30 days (completely submerged in water)... He claimed this maximizes the strength in the concrete segments to later be assembled. Since you seem to be taking a deep dive into dry pour...the next test you do, when you do it, be sure to submerge both (taken out of their forms) in water for 30 days before you test again. A suggestion for a future test... take a weed wacker to the surface of the cured concrete, one wet and one dry pour... after 30 days of soaking in water. MAN about TOOLS, perform this test because, raised garden beds are constantly being weed whacked by string trimmers, which is abrasive to concrete. This is a good test for dry pour.

I've seen RU-vid videos in which a pickup truck was driven onto a 3.5-inch dry pour slab, and nothing happened to the slab. Given the surface area of common vehicle tires and the weight of most passenger vehicles, including pickup trucks, the force created by such vehicles is going to be less than 200 psi. If the dry pour has been done properly, a dry pour slab will easily resist 200 psi. So, yes, for many applications, dry pour is more than good enough. However, would I recommend it for house foundations, garage slabs, driveways, or city sidewalks? No.

i love your video

gosh I thought we would be headed for the shop press (the way we test samples). that would help to find a psi rating. then we would understand if 3000 psi is actually 3000 psi. but dropping it on your lawn and running over was fun...

Get into contact with one of those hydraulic press crushing channels and see if they will create their own blocks and crush them to see the actual numbers behind the force it would take to crush them.

Fence companies always dry pour, and it works fine for them!

I think dry pour could be even stronger. Mixing concrete with water can allow water and air molecules to be in the mix. Dry pouring should give you just enough water to trigger the chemical reaction that caused concreted to solidify.

Actually, The less water you use in the mix, the stronger the mix will be.The strongest mix I have ever worked with was a 1 inch slump. That's like a clay consistency for airport runways.

They should be just had strong. Only if you had too much water to either one it will be weak. But the dry pour once you mist it enough times you can finish it with a mag trowel and create a smooth finish the cream rises to the top. Actually you should mag concrete to a finish regardless how you pour them.

Go viral ❤

If you mix it correctly, you won't have to fix it as much as dry pour that breaks apart faster. It's about time, how long it's gonna last.

It would be interesting if the concrete companies actually hired engineers to test the relative strength of standard wet pour and the dry pour method. When comparing wet pour and dry pour, I think the only real differences in the strength is 1) the possibility that the concrete didn't get wet enough when it was first exposed to water. And 2) you have the problem of possible air bubbles. And 3) possibly too much water in some parts of the concrete mix. Of course regular wet concrete has those potential problems, but hopefully it would be noticed and corrected while mixing and pouring. And the bubbles can be worked out by vibrating the forms. With dry pouring, it is much harder to see the problems or correct them.

I think this kind of settles the debate.

Lol 😂😂😂😂😂 I saw that before you realized it!!!!

This is so scientific.

You are amazing, but also very haphazard.

The strength needed will depend on the application

Like to see the cost of dry compared to the wet mix brought by truck.

👍

lol... thank you.

lol 😂 great test

Throw them on a hard surface like steel or a concrete path

Just a tad off topic.... PLEASE tell me you don't drive that car at night?!! next series please: "How to polish your headlights" :D

Bust them apart. You can always make more.

Since you got 12k viewers you should have enough to monatize your youtube channel again

Thank you for this video. But it could have been 2 mins long

white lithium grease for your door hinges

The best way to test both of those would be to use a hydraulic press with a gauge. Dropping them from a ladder on to the grass is not an accurate test. The ground would absorb the impact.

Work on ur camera positioning. If we cant see them hit the ground then we miss half the fun

Your experiments are comical. Lol😅

I was sure the ford would break

It’s for science…

Noe make a driveway

hahahahahahaha @4:33

I live in south Florida. How important is a gravel pour before you do your dry pour?

Dropping on grass 🤓

Lmao!😂😂

Dry pour concrete

Florida Man

The old fashion way of mixing and pouring , screeding and finishing and brooming it , you will get a professional and finished look

you have to drop it on concrete. concrete on concrete. The soil absorbs too much of the impact

😂

I hope you don't start to believe the earth is flat too. 😊

Why didn't you smack him with a sledgehammer to see how they break something we could actually learn from

🐓😂

You're funny, you dropped them in soil and expect any damage? And again driving over then on the same soil? The dome shape also adds to the strength. Find a concrete pavement drop them there, or roll over them on a concrete pavement.

Ever notice that some very intelligent people can also be really stupid? Not just this video, I've witnessed this MANY times in person. Wonder why this is? Is that the Doc Brown effect?

"Experts" out there have never done dry pour concrete in their life, they have only wet pour since that what they were taught traditionally. Expert don't know everything, take it with a grain of salt.

typically u break concrete cylinders at 30 days 60 and 90 day breaks,they typically break at 100,000 psi on 90 days ,there is no rebar in cylinders ,im sure youll be ok pal... just incase you didnt know the older the concrete the stronger it gets because it is getting dryer and dryer. the Hoover dam is stronger now then it was 30 years ago and will be stronger 30 years from now.

Tests where both perform the same are irrelevant. We need a test where one fails before the other.

This guy is kind of a yahoo.

Dry pour is weaker

Not very useful, you randomly dropped them before the even worse test of uncontrolled car tires. Many of these 'dry pour' people are doing 1.5" thick, you have like 4in thick.

All I see are monkey tests. Can someone put weight on concrete formed into say 4x6x20 and perch them on the ends. Slowly put weight in the middle until it cracks…sounds more of a scientific engineering approach than throwing bowl formed Crete off a ladder onto a grass bed

Dry poor, no good ...

Concrete has been around for thousands of years and its the most used man made material on the planet. Why do people think they discovered something new with dry pour concrete. If dry pour concrete really the same as mixing concrete the normal way. Dont you think we would have been doing this a long time ago. Try to make a cake by using the dry pour methond see how that works out

Talk too much