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#2894 - 06/22/02 06:22 PM the difference between a concrete paving mixer and a regular mixer
beerbellykim Offline
Junior Member

Registered: 06/22/02
Posts: 1
Loc: Ontario
Can someone please inform me of what is the significant difference between a concrete paving mixer versus a regular mixer?

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#2895 - 06/22/02 11:39 PM Re: the difference between a concrete paving mixer and a regular mixer
ken Offline


Administrator

Registered: 04/12/01
Posts: 1219
Loc: Austin, Texas
A paving mixer typically has wider fins, a larger opening, and wider/shallower chutes to accomodate lower slump concrete. The extension chutes are also shorter since they are usually only required to dump in a hopper or directly in front of a paving machine. The manufacturer of the mixer will normlly have a data plate showing whether it is considered a paving mixer or a transit mixer. If you use a paving mixer with normal slump concrete, you will get much larger surges coming down the chute which most finishers don't care for. A regular mixer has smaller, more closely spaced fins at the end to even out the concrete discharge so you don't see the larger volumes of concrete coming down the chute in surges. I think those are the main significant differences.

[ June 24, 2002: Message edited by: ken ]
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#2896 - 06/24/02 05:09 PM Re: the difference between a concrete paving mixer and a regular mixer
RSM Offline
Member

Registered: 06/26/01
Posts: 173
Loc: Southern California
Like Ken says or a paving mixer could be a central mixer on a fixed plant where the concrete is batched in a large mixer, mixed and emptied into a dump truck where the material is then dumped in front of a paving machine.

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#2897 - 06/27/02 07:45 PM Re: the difference between a concrete paving mixer and a regular mixer
conc chick Offline
Member

Registered: 03/05/02
Posts: 51
Loc: St. Charles, Missouri
To elaborate even more on the last post, there are two types of batch plants, wet and dry. Typically when you order mix from your local ready mix company, they place the dry ingredients (cement, sand and aggregate) into the transit mixer then water is added (dry batch plant). When concrete is used for paving, the mix is typically transported by dump truck (it discharges much quicker than a regular ready mix truck). This type of operation requires a "wet plant". They are fairly portable and you will see them on site at large paving jobs. The wet plant is set up to batch the cement, sand, aggregate, and mix water in their hopper then discharge it into dump trucks, ready to be used for paving.
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