On Tue, 21 Feb 2012 19:22:10 +0930, "Kevin(Bluey)"
wrote:
On 2/20/2012 9:34 PM, Dennis wrote:
wrote in message
. au...
On 2/19/2012 2:29 AM, rangerssuck wrote:

I was watching a concrete delivery yesterday and got to wondering -
what happens with the concrete that is left over in the truck? I
suppose they keep the truck turning with some extra water so it
doesn't solidify into a solid block, but then what? Does it get used
for something, or do they just have to find a place to dump it?

We dont get left overs here where I live ,the concrete supplier has
batching trucks that mix the concrete when they get to the site .
It is mixed as it come out of the chute ,separtate containers for cement
powder , gravel , sand and water .The mix can be adjusted by variaying the
ingredients
The mix is measured by a computer as it is discharged ,you only pay for
exactly what you use.

--
Kevin (Bluey)
"I'm not young enough to know everything."



Where are you Kev - over east?

AFAIK here on the west it's all premixed in the truck.

Katherine, NT .
The concrete supplier has two batching trucks .
We do have a supplier that has bowl trucks , but only get jobs when the
batching trucks are flat out.
The bowl trucks you have to order to the nearest .5 of a cubic metre any
left over is waste unless you have something formed up to use the extra
, you pay for it anyway.

Well, there's your problem! ;-P You're a wide spot in the road with
filling stations, supermarkets, and the junction of Stuart Hwy and
Victoria Hwy... (Nothing wrong with that, of course - they had to put
it somewhere, and that's where the easy paths met.) A quick search
says Population ~10,100.

Consider yourselves lucky you're big enough to keep a concrete yard
and the Batching trucks busy. Most small towns it's mix it yourself.

Just look at all the moving parts and wear items on that Batching
truck, with the rubber conveyor-belting mixing chute and mixing augur
and all the hydraulic motors and dispensing augurs for the
ingredients, and everything has to work... Maintenance Intensive.
I'll betcha they are jury-rigging things during the day as something
fails or wears through, then getting them fixed at least once a week.
We can get a few Batching Trucks in Los Angeles and the far-flung
suburbs, but pre-mix (or "Transit Mixed") is the norm.

Most little batches like that they have a stationary Batching Mixer at
the rental yard, they dispense into a 2-yard two-axle tilt-dump or
mixing (little drum & gas engine) trailer, and you tow it to the job
and dump it yourself.

-- Bruce --