Anyone Ever Add Ice To The Concrete Truck? - Masonry - Contractor Talk

Anyone Ever Add Ice To The Concrete Truck?

 
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Old 07-01-2018, 11:16 AM   #1
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Anyone Ever Add Ice To The Concrete Truck?


It's gonna be hot this week, and I have to pour two days of it. Nothing huge, 9 yards and 14 yards. I can't get a first thing in the morning load either day though, and even being in full shade, I still get nervous about the trucks heating up when it's super warm out.

Anyone ever toss ice in the truck on site before mixing, it wouldn't take very long at all to get about 60 lbs in the top of the drum to get the temperature down a bit.

I'm just kind of brainstorming here since I like to avoid retarder whenever possible.

It might be a stupid idea.
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Old 07-01-2018, 11:31 AM   #2
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Re: Anyone Ever Add Ice To The Concrete Truck?


How many yds does a truck hold, 9? 9 X 4000lbs=36,000 lbs
I would imagine you'll need quite a bit more than 60lbs to do anything at all.

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Old 07-01-2018, 11:33 AM   #3
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Re: Anyone Ever Add Ice To The Concrete Truck?


Adding ice is the same as adding water,will dilute the mix and change the water to cement ratio,hence weakening the concrete. You'd be better off using a retarder.
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Old 07-01-2018, 11:39 AM   #4
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Re: Anyone Ever Add Ice To The Concrete Truck?


double your crew size and don't dick around with it.

order it in two loads.
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Old 07-01-2018, 12:42 PM   #5
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Re: Anyone Ever Add Ice To The Concrete Truck?


Use a mobile mix company.

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Old 07-01-2018, 12:47 PM   #6
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Re: Anyone Ever Add Ice To The Concrete Truck?


Ya move faster!!!! I did a walkway a couple weeks ago in the heat....if it would have been one foot longer it would have gotten away from me!!!!!!
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Old 07-01-2018, 12:50 PM   #7
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Re: Anyone Ever Add Ice To The Concrete Truck?


Quote:
Originally Posted by fjn View Post
Adding ice is the same as adding water,will dilute the mix and change the water to cement ratio,hence weakening the concrete. You'd be better off using a retarder.
Right, so roughly 8 lbs per yard for a gallon a yard should add an inch to the slump, I guess that would be over 70 lbs for a 9 yard load.

Shouldn't weaken it anymore than dumping in 10 gallons before pouring.


Edit: reading an article about it, seems that in order to get the batched temperature down about 20 degrees you need to use nearly half the mix design water as ice, that's a lot.

Last edited by NYCB; 07-01-2018 at 12:53 PM.
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Old 07-01-2018, 12:54 PM   #8
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Re: Anyone Ever Add Ice To The Concrete Truck?


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Use a mobile mix company.

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None of them nearby unfortunately. I have used them on a few sidewalks in the past, and the amount of time we had with it was crazy. It comes out of the auger cool to the touch and lets you wait forever before you need to hustle.
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Old 07-01-2018, 12:58 PM   #9
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Re: Anyone Ever Add Ice To The Concrete Truck?


Quote:
Originally Posted by griz View Post
double your crew size and don't dick around with it.

order it in two loads.
It's not the placing part that worries me, we can have that done without much hassle quickly.

I'm the one that has to stick around and power trowel though and I don't want a runaway floor in the afternoon.

It's kind of annoying, I usually try to do them at 7am, but the local companies are slammed and I can't get a morning pour for two weeks. I can't wait that long on either of them.
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Old 07-01-2018, 01:04 PM   #10
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Re: Anyone Ever Add Ice To The Concrete Truck?


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None of them nearby unfortunately. I have used them on a few sidewalks in the past, and the amount of time we had with it was crazy. It comes out of the auger cool to the touch and lets you wait forever before you need to hustle.
Really popular here, never get a hot load, no waste.

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Old 07-01-2018, 01:42 PM   #11
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Re: Anyone Ever Add Ice To The Concrete Truck?


Soak the subgrade, tent or sun shade the area, 2% retarder, 6 slump and sweat your azz off cause it's gonna go quick anyway.
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Old 07-01-2018, 02:27 PM   #12
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Re: Anyone Ever Add Ice To The Concrete Truck?


P.S. Don't forget your cure and seal !
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Old 07-01-2018, 08:45 PM   #13
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Re: Anyone Ever Add Ice To The Concrete Truck?


I can request ice in the mix all Summer long, it is added at the plant for an additional charge, same as hot water in the Winter.

Adding retarder helps a lot and gives you some extra time. In the heat I'd rather wait on the concrete than have it get away.
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Old 07-01-2018, 09:18 PM   #14
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Re: Anyone Ever Add Ice To The Concrete Truck?


Quote:
Originally Posted by fjn View Post
Adding ice is the same as adding water,will dilute the mix and change the water to cement ratio,hence weakening the concrete. You'd be better off using a retarder.
I find this offensive, the name of this product should be changed to delayer
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Old 07-02-2018, 12:18 AM   #15
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Re: Anyone Ever Add Ice To The Concrete Truck?


I 2nd wet the subgrade advice, that makes all the difference in the world. And there is no shame in adding “delayer”!

Just keep a guy to work the edges while you are on the whirly bird. Also I like to hang a 2 gal bucket of water with a fatty paint brush. On your final pass, use it to toss a little water on the pock marks to smooth them out quick.

Anyone here used super plasticizer? I hear it’s good for pouring walls in the summer, but I’ve never used it.


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Old 07-02-2018, 03:37 PM   #16
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Re: Anyone Ever Add Ice To The Concrete Truck?


pour at 3:00 pm so that you dont have the sun pounding it all day
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Old 07-02-2018, 03:52 PM   #17
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Re: Anyone Ever Add Ice To The Concrete Truck?


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Anyone here used super plasticizer? I hear it’s good for pouring walls in the summer, but I’ve never used it.


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Haven’t used it in concrete but I have used it in mortar and can say that it is amazing how it makes it flow easily




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Old 07-03-2018, 10:00 PM   #18
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Re: Anyone Ever Add Ice To The Concrete Truck?


Generally added at the plant and replaces mix water. Do other things.
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Old 07-03-2018, 10:21 PM   #19
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Re: Anyone Ever Add Ice To The Concrete Truck?


Take temp readings at start and finish of each unload...

Have trucker engage the drum rotation counter, at the plant, every 'extra' turn just adds heat through the tumble action once the mixing is complete.

reject any loads over mixed, like > 300 revolutions.

Avoid rush hour traffic that might delay the redi-mix trucks, use the plant closest, even if it is 50-100 $ more.....

If the slab is not need to be loaded ASAP, use more fly ash, less Portland cement, The larger the large aggregate, the less internal heat per yard at the the same final strength...

If its indoors, install a radiant heat piping, and fill and chill.....even a total loss tap water would slow the set...

A tarp awning is most likely the most practical solution, and will improve the total concrete quality, and a smaller crew...

If the work is near flat, you could flood the pour after it is finished with a sand and plastic sheeting dyke or a slightly riskier method of using yard sprinklers to keep the crete WET for hours-days?
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Last edited by Fouthgeneration; 07-03-2018 at 10:26 PM.
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Old 07-03-2018, 11:04 PM   #20
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Re: Anyone Ever Add Ice To The Concrete Truck?


Eh...9 yards ain't that big of a pour, especially with a power trowel.

I'd be more worried about getting a hot load, with an afternoon delivery from a company that's busier than s#!^.

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