The TRUTH About Dry Pour vs Wet Pour Concrete!! Strength Test - You WON'T Believe the results!!

Comments · 3.7K

• AN

  @andymeyer8635 · 2 years ago

  Geotechnical engineer here, my last job was in airport pavements. We test both new and existing pavements when performing construction and evaluations. There are some less industrialized countries that will dry pour patches, I’ve cored and performed split tensile tests on tens of thousands of samples, the dry pours were always laughably poor quality.

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• TE

  @textualchocolate201 · 2 years ago

  This video has proven to me that I need a shop press machine for my wife’s cornbread!

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• ST

  @still-impermanence · 1 year ago

  So I learned that as long as a 737 doesn’t land on my chicken coop I'll be ok.

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• VA

  @vaughnmilburn6966 · 2 years ago

  I am a concrete engineer. No matter what, dry cure concrete will always be considerably weaker for many reasons; however,  you can increase the strength by keeping the slab flooded with water and covered for at least a week. It would be better to flood and cover for thirty days. No matter what you do, it will not ever reach even half the strength of wet pour concrete!

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• MI

  @mikelouis9389 · 2 years ago

  This is why the teaching of basic science is still so critical.

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• TI

  @Timothy-Wess · 1 year ago

  I helped my old neighbor set some fence post doing a semi dry pour. Pour some dry cement, add some water, in layers of 2 inches. Not just watering the top.<br>That was 15 years ago. We pulled the post to change the fence location a few years back, and that shit was fairly solid.<br>I would only trust this process on fence or mailbox post, not on a dame slab or driveway.

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• PO

  @Poppageno · 2 years ago

  In the 80&apos;s we would use drypour for building decks and fences, it saved time. Then in 86 I got a job in the local cement plant and at one point worked in the lab. Cement is made by cooking limestone/marble, iron, shale together into clinker. Clinker is then cooled somewhat and ground down into a powder finer than face powder, at that point it is called cement. When you mix cement with sand and aggregates(rocks) it is concrete mix, add water and it becomes hard and is concrete.<br> &nbsp; &nbsp; What happens when you add water is the cement powder crystalizes. This fills tiny spaces between rocks and sand and other crystals, bonding and putting pressure in all directions and during this phase change emits heat. Once the phase change(curing) has gone thru 3 days some 80% of the strength is there, some 3 weeks later and it is at 90%. It never stops curing. HTH

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• MI

  @mikeazeka1753 · 2 years ago (edited)

  I&apos;m a civil engineer. &nbsp;We learned 40 years ago that dry pour concrete will always be very weak compared to a cured wet pour concrete mix. &nbsp;The difference can be 10 times stronger for wet pour, and the dry pour will have many pockets of weakness, the wet pour will be uniformly strong. &nbsp;Not a surprising outcome.

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• 66

  @6605eric · 1 year ago

  I have seen numerous video&apos;s, along with my wife&apos;s recommendations to do a dry poor. &nbsp;This video just got me a Mixer. &nbsp;I appreciate what you have done to set the record straight!

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• SG

  @sgsax · 2 years ago

  I&apos;m glad to see the experiment completed, but can&apos;t see how anyone would have predicted a different outcome. The strength of the concrete comes from the cement and water being mixed in and helping everything stick together. There&apos;s a reason why you don&apos;t see manufacturers recommending it. Dry pour concrete is like baking a cake without mixing the ingredients together. You get similar undesirable results. Thanks for demonstrating what a bad idea this is.

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• CH

  @chikungster · 2 years ago

  I’ve been waiting for a pressure test on dry pour. Thanks!

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• MA

  @masonjarhillbilly · 1 year ago

  I used to install a lot of 20 and 22 inch satellite dishes for Dish and Directv using pole in concrete. &nbsp;I would drive a few lag bolts into the bottom of a steel pole to give the concrete something to bite into. &nbsp;I would put the pole in, pour in the quuck set dry concrete, tamp it solid, pour water down the inside of the pole. &nbsp;Done and set up in 30 minutes. &nbsp;This worked well. Never had a failure. &nbsp;It also aided if ever there comes a day it has to be removed. &nbsp;Dig pole out and beat the concrete with a hammer. &nbsp;It would easily break apart into large pieces. &nbsp;Wet pour concrete would not break apart. &nbsp;This is the only application I know of that dry pour has its advantages. &nbsp;I am sure there are more.

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