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High temperature in aggregates

08/12/2022 2:55 PM

Good day.

What would happen with Cement (CPO) if the temperatue of the aggregates is as high as 100 °C ?

The mix aggregates & cement is in dry condition... preparing Dry Mortar Project.

Thanks an advance

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#1

Re: High temperature in aggregates

08/12/2022 4:32 PM
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#7
In reply to #1

Re: High temperature in aggregates

08/16/2022 10:57 AM

Good day.

My concern is, as you know, that heat increasing is the one that make the raw material became in cement... so if we make the cement be in 100 °C could happen some "reversible" phenomenum.

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#2

Re: High temperature in aggregates

08/12/2022 6:18 PM

If there is no water present, then nothing.

<...Cement...> is made in a high temperature process, then crushed to a powder.

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#3

Re: High temperature in aggregates

08/12/2022 7:10 PM

Back in the 80’s, having cement delivered, one of the drivers mention ‘Hot cement’. I looked it up

As far as temperature, depending on the thickness, you need to control the heat as it cures..

Here’s a little info on the Hoover dam about controlling the temperature.

and here’s when the aggregate is hot on the concrete mix.

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#4

Re: High temperature in aggregates

08/13/2022 8:18 AM

I have heard of replacing some of the water with ice in the concrete in the truck to reduce the temperature.It is totally melted by the time it reaches the work site.

When pouring the concrete,insist on at least 100 revolutions of the tank before pouring.

If you need to delay the setting time,add a cup of coffee to a truckload of mixed concrete .It will surprisingly delay the set up time.

Don't believe it?Try it,you will see.

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#5
In reply to #4

Re: High temperature in aggregates

08/14/2022 10:14 AM

That normally isn’t a problem, unless the pour is next to to the cement company…

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#6
In reply to #5

Re: High temperature in aggregates

08/16/2022 7:30 AM

It is a government regulation on certain projects,like highways.The concrete plant is constantly being relocated as the highway progresses,and the mix time varies.This is to ensure a total mix.

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