Pouring A Concrete Slab With High Range Water Reducer (58' x 28' x 6" Slab)
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- čas přidán 10. 09. 2024
- #EverythingAboutConcrete #TheConcreteUnderground
In this video I'm pouring a concrete slab using a high range water reducer to make the concrete very flowable.
This concrete additive is designed to make the concrete feel wetter or looser than it really is. The HRWR makes the concrete flow more easily but it doesn't lower the strength of the concrete or make it more likely to crack.
When I order my concrete, I ask for either mid-range water reducer or high range. It depends on what I'm pouring and how far I have to pull the concrete. This additive costs a little more per yard but it makes pouring the concrete easier. I don't need as much labor to pour a concrete floor as I would need if I didn't use a hrwr.
In the video, the slab is 58' x 28' x 6 inches thick. It took 25 yards of concrete and we poured the slab in about 30 minutes.
The power screed we used in the video is the ScreeDemon from MBW, Inc.
This screed is very light and makes screeding concrete very easy. My daughter, Tia, screeded this entire slab using the ScreeDemon and did a great job!
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Hello Mike, I am retired and live in the mountains of Southeastern Kentucky. I have just built a 30x60 work shop, with a concrete floor. I have been watching your videos for about 2 months. I decided to tackle the project myself, with 5 of my friends helping me. We got the pour completed in about 2 hours and I'm very pleased with it. I could not, nor would not, have done the job myself if it hadn't been for you and your videos! You gave me the confidence, using your methods, I needed to do it. I saved around 5 thousand dollars by doing it myself. Thank you for sharing your videos, and I'll be enrolled in concrete underground very soon.
Steve Wow! That's awesome and great for me to hear. I'm glad the videos are helping, that makes it all worth it for me. Great job!
Hey Mike great video, we own a family construction company in Cleveland and do a lot of concrete!! I wish I had a teacher like you 20 years ago!! All I got was a bad back and some choice vocabulary. Salute!!
Just an engineering point - The perimeter rebar that you were wet-setting along the edges is most effective, very close to the bottom of the slab pour, where it can help resist tension forces. Rebar or WWF has little to no affect at all in reinforcing concrete when it is placed in the middle, bcz the middle is actually considered to be under neutral forces. Neither tension, at the bottom nor compression at the top.
This is also why your viewers needn’t get upset when they see you walking on the wire mesh, after you’ve pulled it up once. It’s right where it needs to be.
can i get some more responses on this - have always been told "in the middle" and was at the point i was going to ask mike about them stepping on the wire and it being pushed back down.
@@johncross436 This is one of those things where a sketch would be very helpful, but I’ll try to explain anyway.
Imagine a 12” deep beam with 2 vertical rows of dots, 3” apart, at the center of the beam. Then put a load on top of the beam, at the midspan, directly in between the 2 vertical rows. As the beam begins to deflect, you would observe that the dots at the top of the beam get closer together (compression), the dots at the bottom of the beam move further apart (tension), while the dots in the middle of the beam remain constant (neutral). A slab behaves in exactly the same way.
When you form a typical, structural concrete slab, the top and bottom steel is always called out to be ¾” from the top and ¾” from the bottom. The engineer wants the steel as close to the edges as it can be and still get concrete coverage bcz that is where the steel is most affective at resisting the compression and tension forces. Almost never will there be any steel called for in the middle, bcz the middle is halfway in between the top and bottom (obviously) and right in the ‘sweet spot’ where the 2 forces cancel each other out.
As far as Mike and the crew stepping on the wire, once they pull the wire up with the hook, aggregate gets under the wire and doesn’t allow the wire to get all the way back down to the bottom.
Great comment and explanation!
Hi John, we've been doing it this way for 40 years with no problems. Once the 3/4 aggregate gets under the mesh and rebar it doesn't go back to the dirt when you walk on it. Yes, it's better to have slab bolsters under the wire but it's not a real problem. We also use fiber mesh in the concrete. Really the most important thing is a good gravel compacted sub-base.
Thank you for that!
Mike Day... the King of concrete. Always makes it look easy ... 👍 Hats off to ya... And thanks for answering the question I was going to have about the powerscreed sinking into a fairly loose slump. Thx Mike...
We haven't had any issues with it sinking unless you stop moving and keep the throttle running.
Just found your channel. Wish it would have bin out 40 years ago when I started out my masonry career. Toke me years to figure it out by myself. When water reducer came out I tried it on a smaller slab just to see and used it ever since. I just never would share my trade secrets with anyone, not even employees. Now retired 5 years. Im sure people appreciate your sharing, nice job
Thanks Henry!
Love your videos Mike. I’m a concrete guy myself (in Ohio). I enjoy watching various contractor videos to see the different ways people do concrete. No single way is always correct. We all have our own practices. I’ve learned so much in the last 20 years just by picking up different techniques. Those learning experiences have made me a trusted contractor in my area. I rarely work outside 15 miles from my home anymore.
Good teamwork, everyone doing their part. Looks great.
Thank you!
I have to say mike Day you do some nice work you really do know your stuff
Thank you
Thats a mighty fine slab ! Shoutout from socal
Thank you!
Just started my own business and im get me one of those power screed machines
Making it all look easy and 👍 such a great team work
Thank you Daniel!
I am really impressed with the wetting agent I have heard of them but never seen it in use .
I use a 7cf mixer to do all my work
This will make my work so much easier
Thanks
You might be surprised to know that water reducers (plasticizers), are essentially the same chemical makeup as laundry or dish soap. If you’re just working on small, flat work pieces, you could try adding some to your mix as an inexpensive ‘home-brew’ alternative to the commercially used types.
@@psidvicious thanks I always knew dawn dish soap was good for a lot of things
@@dank2265 Right. It works on the molecular level, by breaking down the surface tension of the water.
If you’ve ever sprayed a water mixture of insecticide or plant fertilizer on your flower/vegetable garden, only to be frustrated seeing it bead up on the leaves and drip to the ground, a small amount of Dawn liquid can work for this too.
Just be careful though. A little goes a long way for this application.
@@psidvicious yes thankyou I understand the chemistry behind it
I just did not know that it would not effect the integrity of the concrete
Now to start playing with it 1 or 2 drops per gallon of water
Thanks again
It does make the concrete flow nice and easy. For me, it's worth a few extra bucks a yard. It saves on labor.
Good job guys
Used to be a local mason supplier Southeastern NY/Northern NJ gave us a kinda concrete slide rule to figure total yards, even circles - very handy.
I haven’t seen one of those in years. Concrete truck drivers used to hand those out for free if you asked them, along with carpenters pencils and the occasional t-shirts. The good ole days!
Hi John, I used to use one of those too. I still have some. Mostly I figure it in my head now.
I see you have switched to the screedemon over the shockwave? What do you like more about that machine? I've been in the market to buy a 2nd power screed and would appreciate the insight. Thanks
Five ⭐️ work.
Thank you
Very helpful. Good team. 👍
Thank you!
Pulling up the wire... 😅😅😅😅 You know the youtube haters.. Was coming.. #goodjob
Thank you
Man I'm really jealous of the vibrating screed I've got to use one lol. I do think if I ever started my own kind concrete business I would get one though look so nice back saver.
Great video, been waiting all week. Thought I was subbed but was not, am now. Keep it up from NC.
Thanks David!
You have one awesome daughter good sir!!
Great video mike!
Sir I have been doing concrete 32 years in Pennsylvania super p is crazy here
How we calculate the amount of additive plastiser we need this type you use ?is any formula?assuming from substance to substance but what can you share about this ?thx!
Good man mike!
Thanks Cameron!
Very nice, professional Mr. DAY
EXCELLENT JOB!!!!!!!!
🚧 👷♂️ 🏗 👷♀️ 🚧 👷♂️ 🏗
SALUDOS DES DE TEJAS
Thank you!
wow thanks you 😀
You're welcome!
Another great demonstration! If you were pouring a garage with 3” slope over 16’, would you use this slump or maybe less slump in order to keep the concrete from running downhill? Thanks Your daughter looks very confident in her work. You’ve done well!
A little less on the slump for that. That's quite a slope in 16'. Around a 4 slump.
Thanks Mike. I had previously searched for garage slope online and most recommended 1/4” per foot slope. My slope is a little less. What do you recommend? It is great that, in addition to doing great projects for people, you take time out to answer our questions. Many thanks!
Do you like the gas screed better?
I think Tommy Dilldooo has been on the sauce. If he pours concrete like he writes ..... 🤔
Thank you Mike Day! for all you and your team do. I'm planning on joining your course concrete underground. I have started my own concrete company and just hired my first employee. Question on these courses do you touch base on how to invoice estimate, and figuring how to charge sqft vs flat rate?
Does it require a general contractor license to be a sidewalk and driveway contractor ?
Not in Maine. I'm sure it does in some states.
Do you like the screed demon better than the Marshalltown?
They're both excellent. That's the honest truth. You can't go wrong with either one.
I dont think my Marshalltown would float on something that wet. This is my first year running it. The screws demon seems like it would float on top better and be cleaner since it’s a solid board.
You're probably right about floating a little better. The ScreeDemon is a little lighter and the solid board helps it float better. The Marshalltown is really solid and great for big jobs.
Mike, Do you use anything on forms to aid in striping?
ID take that girl over any 2 average guys! she's a worker!
Mike do you ever use a rattle stick on your bull float?
You call it flat but is it level ? Show a video once its hard with your laser
Hi Mike. Could you see the Concrete Ninja from australia. They do this very easily.
What size stone was in that mix?
Did the other young lady choose a different life path? She was with you earlier this summer.
Yes she did. She's in college too far away to help now.
Hello. How much water reducer per yard is required. Curious on cost. Thanks
You concrete batch plant can answer that for you.
Aloha
Hello!
Drives me nuts when no one lifts the mesh I've fired laborers for not doing it. After I tell them twice and they still don't listen they are going down the road. You do nice work my friend keep it up
Drives me nuts watching people pull it up and then immediately walking on it. It’s almost as dumb as standing on mesh while pulling up. It’s almost as if almost all steel ends up at the bottom and it’s fine.
Guess what - if you raise it to the middle where it does the least good; I would fire you. Read @psidvisious comment and some of his later replies - then pass it on.
🇺🇸🎥😎👀👍👀🤙