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Tool Talk Discussion Forum

Concrete mixer question ---

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Truck

11-29-2004 15:01:00




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Hi guys.. I have a Stone brand ( I think) gas powered mortar mixer I picked up at a yard sale this summer. I would like to make a 20 foot square slab next spring, 4 inches thick, and I have a large supply of sand, and access to gravel to mix..

Will a paddle type mortar mixer work for such a project or do I need to find a barrel type mixer instead?

Also. the previous owner wasn't very good about cleanup once he was done mixing. The drum is shiny clean where the rubber pads run but everywhere else is a mess, covered withe a thin layer of cement. Short of wirebrushing it to death or sandblasting, is there any trick way to get this off? I'd like to get the mixer looking like new eventually so I might be able to sell it some day after I have finished with it. I have all winter to get it ready but I really would like to have time to work on some other projects like my jeep ;-)or my tractors.
Thanks for your help!

Truck from upstate NY

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txblu...gotta read this

12-01-2004 07:47:14




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
Friend decides to build 10x15 room on rear of house.

Didn't want ruts in the yard so told concrete truck to sit at the curb.

Had no help; did it all alone.

Wheelbarrowed 10x15x.5 (6" slab)/27 = 2.7 cubic yards (about 9700#) of concrete from the street, up a 4' incline to the rear of his house.

You absolutely would not believe the mess. The room was absolutely unusable. He had an afgan type rug trying to cover it as carpet couldn't handle it, chairs and tables sitting at funny angles as there was no two square inches the same height.

What a mess and all cause this guy was hard headed and "wasn't going to be proven wrong". Pittied his poor wife. Had to put up with the room and HIM!

Mark

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Davis In SC

12-02-2004 21:29:52




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 Re: Concrete mixer question --- in reply to txblu...gotta read this, 12-01-2004 07:47:14  
But there were no ruts in his yard.... Except the one from the wheelbarrow....



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Mark - IN.

12-02-2004 19:27:48




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 Re: Concrete mixer question --- in reply to txblu...gotta read this, 12-01-2004 07:47:14  
Mark, similar experiance. A friend lives in Stykney, IL. which is a Chicago suburb - lot's of close houses. One Saturday years ago decided to put in a patio about the same size, and asked for help. Ok, I show up to help. Was him (bad back, honestly), his father-in-law, a neighbor, and me. The mixer wouldn't fit into the alley out back, and he didn't want to crackup his drive, so he rented 3 contractor's wheelbarrows. Filled the first, tire flat - no pump. Filled the second, tire wasn't flat, but handle broke as soon as lifted it - nailed a 2x4 on as a handle and it worked. Filled the third, tire was flat, and still no pump. I got a flat, neighbor got a flat, and Dad-in-law got a 2x4 handle. That was work wheelin' from the street, so much as a matter of fact that one time I rounded the back of the house, I flipped the wheelbarrow up and over onto my buddy as he tried to float the concrete. "Sorry about that Tim". But we got it smoothed out and grooved. Then his wife tried to open the back screen door from inside, and found out that the concrete was higher than it's bottom edge after it got open about 1/4 of the way, and the concrete was really setting up by then. We carved it down and fixed it up so that the door opens, but guess where the rain water gets funneled?

Hey Mark, I was just a laborer, not a planner. My friend's kids have grown up and moved since then, and his wife has divorced him, but not quite sure for that alone.

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1945 A

12-01-2004 06:48:44




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
I"ll throw in my .02 worth on this topic. I don"t believe the style of mixer would keep you from using it for concrete. I worked in a plant that had mixers which consisted of a drum turning in one direction, with counter-rotating paddles running close to the floor, and they never "locked up" because of the gravel. I"ve also poured (30"X 20") slab using a small mixer such as the one you described----a total of 464 bags. That was a lot of work, and wore everybody out by the time it was done. I guess the bottom line is how much work do you want to do. I would do as others have suggested, and divide the project into manageable parts, so that you can finish as you go.
A key part of using a small mixer is to put water in first----- not all of it, but enough to keep things fluid---maybe 5 gallons or so, depending on mixer size....
Good Luck on whatever you decide!

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Heat Houser

11-30-2004 21:02:28




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
I just mixed and poured some concrete (0.8 yd) for a feed bunk and it was fun to do. A 20 X 20 slab may be a bit much for one afternoon. I would suggest that you divide the project and do four pours of 10 X 10 or 2 of 10 X 20. If you do the 10 X 10, you will have about 1.25 yds. to mix. This will take about 3 hours to mix and pour, less if you are not as lazy as I am. Use a drum mixer, not the mortar mixer. Put the rock in first, some water, the sand and then the cement. 1 cement, 2 sand, 3 rock by volume. The mixer I was using would mix 3 spade fulls of cement, 6 of sand, 9 of rock. I got it too wet many times as when it gets close, a thimble full of additional water is way too much. Good luck

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leaddog

11-30-2004 16:54:31




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
back when I was a teen I helped my dad pour a new floor, mangers, and approches in our barn and we did it all with a hand mixer that we put a tire on and ran it off the jd-b with a belt. The mixer was almost wore out as it had pored 18 barns but that had been done with the hand crank. Plus we had to load and haul all the gravel by hand.
sure was a LOT of work but didn't cost much and since we didn't have any money that made it ok.
Now I use redi mix and pay the $80 a yard and smile.

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51Pony

11-30-2004 15:17:37




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
Truck,
If you're from upstate, possibly this would help. Near Syracuse there's an outfit with a state certified concrete machine and these little dual axle trailers that will haul just about what you need. Check you yellow pages for an outfit that will mix it and put enough chemical in it to slow it down long enough for you and your crew to get it screed out and smooth. The other guys in this post are correct, you better have a lot of friends with bull floats and such.

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SNOKKI

11-30-2004 14:00:17




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
concrete measures out to 81 sguare feet per yard if its 4" thick --so a 20 by 20 slab containes 400 square feet of surface area so you need to devide the 81 sq. ft. into the 400 sq. ft. of the slab and you need 4.94 yards of concrete or in reality 5 cubic yards--When I did concrete I made the truck come early in the morning and figured at least one man per yard--and no food or drinks until the job was done and tools were cleaned and then PARTY TIME --- SNOKKI

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thejdman01

11-30-2004 10:32:00




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
they do make cement blades for air chisels or air hammers whatever you want to call them. never tried a regular blade to see if it woudl hold up.



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Butcher

11-29-2004 17:36:08




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 Re: Concrete mixer question --- in reply to Truck, 11-29-2004 15:01:00  
What you have is what you said, a morter mixer. If you go throwing gravel into it you will have it stuck in a heartbeat. If it is all crusted up from lack of cleaning the best way to clean it is beat the living crap out of it with a hammer. You could use the mixer to mix your sand/portland/ and water, dump it out and add the gravel later but that sounds like way to much work. Keep in mind that if you are going to pour a 20 by 20 slab, 4 inches thick that it will take 5 cubic yards of mud. Thats alot of mixing man.

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txblu

11-30-2004 09:28:02




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 Re: Concrete mixer question --- in reply to Butcher, 11-29-2004 17:36:08  
Dude, call yourself a truck cause you'll be a mess if you don't. Ye ain't gonna get there by hand. It will set up before you can even get started pouring.

Also get a crew. Been there done that. Trying to be your friend here. Need to listen.

Concrete ain't a forgivin. Mess it up and it stays that way forever.

Mark



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paul

11-30-2004 13:13:18




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 Re: Concrete mixer question --- in reply to txblu, 11-30-2004 09:28:02  
Yea, a person can mix & pour that much if it's a footing, but a slab, that's enough work just leveling & getting good in time, much less mixing in a small mixer.....

--->Paul



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swms301

11-30-2004 16:41:39




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 Re: Concrete mixer question --- in reply to paul, 11-30-2004 13:13:18  
As a contractor I agree with all the other comments. Buy ready mix!

We tried a product called "ConDestructo" which was a chemical that was supposed to help remove old concrete. Had so so luck but it was an overstock old sample one of our suppliers gave us. Don't remember who made the product. When you call the ready mix outfit ask them what they use. Clean up the mixer, fix it up and sell for profit. Stone has been a pretty good brand, for us at least.

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txblu

11-30-2004 09:28:02




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 Re: Concrete mixer question --- in reply to Butcher, 11-29-2004 17:36:08  
Dude, call yourself a truck cause you'll be a mess if you don't. Ye ain't gonna get there by hand. It will set up before you can even get started pouring.

Also get a crew. Been there done that. Trying to be your friend here. Need to listen.

Concrete ain't a forgivin. Mess it up and it stays that way forever.

Mark



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Truck

11-30-2004 01:14:23




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 Re: Concrete mixer question --- in reply to Butcher, 11-29-2004 17:36:08  
Never even thought about it getting stuck.. but now that I have, it should have been obvious to me.. DUH!..

Well, at least I'll have a nice mortar mixer to trade..

A buddy just did a similar slab... He lost a considerable amount of weight mixing it in a small mixer and shoveling by hand.. Saved some real cash too. Sounds like a poor man's gym membership to me!

Thanks for the advice!
Truck

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poor tom

11-30-2004 16:04:12




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 Re: Concrete mixer question --- in reply to Truck, 11-30-2004 01:14:23  
I mixed about 4 cu. yds. in several stages to fix my collapsing foundation last year...in the wheelbarrow!! It killed me! Never again in a wheelbarrow. Gonna get a mixer to finish. I get the shakes just looking at the wheelbarrow now.



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cole in mo.

12-01-2004 03:39:24




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 Re: Concrete mixer question --- in reply to poor tom, 11-30-2004 16:04:12  
This past summer I was helping a buddy pour a footing for a slab for his house, truck came with 8 yards on it, got stuck before he got to where we wanted him, unloaded all of it with a wheelborrow.



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Mikeworkstoodanghard

12-20-2004 09:07:06




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 Re: Concrete mixer question --- in reply to cole in mo., 12-01-2004 03:39:24  
I just finished my concrete home . 210 yards and lots of backaches. Sell me your mortar mixer so I can lay brick in the spring!!! Use the money on your project! If interested call Me.
Good Luck,
Mike 217 202 6404



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