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  #11  
Old 10-12-2018, 05:00 AM
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i dont get the benefit of a second mixing body, sounds like a lot of complication to me. if you have the labour to be able to constantly lay concrete while someone else makes it then I'd have thought a bigger pan would probably suffice. pan mixers are relatively common over here, and I've never heard someone wish they could have two on the go, it's hard work keeping one going.
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  #12  
Old 10-12-2018, 01:53 PM
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I've seen these pan mixers online, but never in person.

How long is the mix time ?

For a frame of reference the smith mixer I posted a pix of says
1 min for mixing.
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  #13  
Old 10-12-2018, 10:16 PM
threepiece threepiece is offline
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Originally Posted by theweldor View Post
You might want to think about using at least 3/16 if not 1/4" plate. 14 ga won't last long as mixing concrete is very abrasive.
The mixers I repair are 5/16 shells lined with 1/4" AR450. The mixing blades are formed out of 1/2" AR 450.
I was afraid someone would talk me into thicker steel. Believe it or not I cannot find anyone in this area that can roll plate. That is why I formed my own clam shell attachments by using a "bump bending tool" for the soil compactor I made. You can see it here https://www.shopfloortalk.com/forums...ad.php?t=48618

I suppose I could use the same "bump bending tool" for forming the mixer pan. There will be a series of small flats on the surface but I don't think they will cause any trouble.
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  #14  
Old 10-12-2018, 10:29 PM
threepiece threepiece is offline
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Originally Posted by JohnBoy View Post
i dont get the benefit of a second mixing body, sounds like a lot of complication to me. if you have the labour to be able to constantly lay concrete while someone else makes it then I'd have thought a bigger pan would probably suffice. pan mixers are relatively common over here, and I've never heard someone wish they could have two on the go, it's hard work keeping one going.
I guess I want two pans/trailers because of the distance between where the concrete is mixed and the work site. My thought is while one trailer is being transported to the site the other can be loaded and mixed so it is ready to go when the other gets back, and so on. Does this seem logical?
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  #15  
Old 10-12-2018, 10:45 PM
threepiece threepiece is offline
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How long is the mix time ?
.
I suppose this will be answered after it is done and tested.

The objective in mixing is to cover all sand and stone with cement. Over mixing will wear down the sand, stone and the mixer, as well as waste energy. The research I have done tells that one minute is the desired time.

One of the main focus of my design effort is to create a mixer that can mix a one yard batch in one minute, an effort I am indeed struggling with.
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  #16  
Old 10-13-2018, 08:11 AM
theweldor theweldor is offline
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The trick to short mixing times is to blend all the material and the water as much as possible while loading the mixer. Sometimes pretty easily done, sometimes it can get costly.
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  #17  
Old 10-13-2018, 07:01 PM
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I guess I want two pans/trailers because of the distance between where the concrete is mixed and the work site. My thought is while one trailer is being transported to the site the other can be loaded and mixed so it is ready to go when the other gets back, and so on. Does this seem logical?

Yes, but I don't think the benefits outweigh the costs. You're complicating the engineering a lot and I think you'll only get the benefit if you have a person running the mixer, another hauling and more setting the concrete. And do you need another tractor to run the mixer while the other delivers?

KISS
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  #18  
Old 10-13-2018, 07:10 PM
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I didn't see the whole process written up, there is some xport going on
from the material yard to the dump point ?

Figure up everything, including time & men.

Then come up with a yards per hour that you need.

What is the pour job ? total yards at one time ?
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  #19  
Old 10-13-2018, 07:16 PM
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Nothing wrong with bump bending, do the ends first and the middle last
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  #20  
Old 10-16-2018, 02:11 PM
threepiece threepiece is offline
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Originally Posted by digger doug View Post

Figure up everything, including time & men.

Then come up with a yards per hour that you need.

What is the pour job ? total yards at one time ?
Did I mention that I have little experience with concrete?
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