Chard Coffee grounds in concrete

[560Dennis]

We were reading that Australia tech's using oven chard at 350 C coffee grounds to increase the compression strength of concrete 29 percent.
Might have give it an ultimatum test in northeast Ohio.

 

[rrlund]

I didn't know Coca Cola would extend the time before concrete sets up. My son poured the floor in his new shop two weeks ago and they ordered about three yards more than they needed. I needed a little bit to patch some holes in the feedlot, but no where near that much. We had some approaches to gates and ruts in front of feed bunks where we could use it, but wasn't ready for it. I asked the driver how long we would be able to work it of we dumped it in a pile in the driveway. He said about an hour, but he said he had a couple of bottles of Coke that he could dump in it and that would extend it out to five or six hours.

 

[Mark Poss]

I didn't know Coca Cola would extend the time before concrete sets up. My son poured the floor in his new shop two weeks ago and they ordered about three yards more than they needed. I needed a little bit to patch some holes in the feedlot, but no where near that much. We had some approaches to gates and ruts in front of feed bunks where we could use it, but wasn't ready for it. I asked the driver how long we would be able to work it of we dumped it in a pile in the driveway. He said about an hour, but he said he had a couple of bottles of Coke that he could dump in it and that would extend it out to five or six hours.

Did it work?

 

[Brown David]

We were reading that Australia tech's using oven chard at 350 C coffee grounds to increase the compression strength of concrete 29 percent.
Might have give it an ultimatum test in northeast Ohio.

Do you mean "charred" maybe?

 

[rrlund]

Did it work?

We didn't try it. I would have been OK with most of it taking longer, but I wanted the stuff we were putting in the feedlot to set up as fast as it could. There were cattle in there and it wasn't going to be easy to keep them out of it. We got it where we wanted it before it started to set.

 

[kencombs]

I didn't know Coca Cola would extend the time before concrete sets up. My son poured the floor in his new shop two weeks ago and they ordered about three yards more than they needed. I needed a little bit to patch some holes in the feedlot, but no where near that much. We had some approaches to gates and ruts in front of feed bunks where we could use it, but wasn't ready for it. I asked the driver how long we would be able to work it of we dumped it in a pile in the driveway. He said about an hour, but he said he had a couple of bottles of Coke that he could dump in it and that would extend it out to five or six hours.

It is likely due to the sugar in the Coke. A very small amount of sugar added will slow it down. A little too much and it'll never set. Didn't know that until very recently when I ran across that info somewhere.

Never tried it myself, but really wish I known that years ago as I could have saved myself some problems. Hot weather, hot load (been in the truck from previous delivery then more added for mine).

 

[showcrop]

Boston Sand and gravel just added water when trucks were sent back from the "Big Dig" because the clock had run out on the batch. They punched a new ticket for it and sent it back to the job site. So far it seems to be holding up OK.

 

[moresmoke]

W

It is likely due to the sugar in the Coke. A very small amount of sugar added will slow it down. A little too much and it'll never set. Didn't know that until very recently when I ran across that info somewhere.

Never tried it myself, but really wish I known that years ago as I could have saved myself some problems. Hot weather, hot load (been in the truck from previous delivery then more added for mine).

50 lb bag of sugar will keep 10 yds from setting. Used to be some outfits would keep a bag in the truck in case of a break down. If they could still turn the drum, dumping a load was better than chipping it out, then dumping it.

 

[drsportster]

How do you break up an Italian wedding ? Yell "Concrete"

 

[Charles in Aus.]

We were reading that Australia tech's using oven chard at 350 C coffee grounds to increase the compression strength of concrete 29 percent.
Might have give it an ultimatum test in northeast Ohio.

Researchers at RMIT Melbourne , Royal Melbourne Institute of Technology. I lectured there briefly in the mid 80's .
15% of the sand used was substituted with the charred grounds . An impressive increase in compressive strength that I find hard to understand . Still if it's a viable process the savings in material , reuse of waste and the weight reduction of the finished mix are real advantages .

 

[a49deere]

Researchers at RMIT Melbourne , Royal Melbourne Institute of Technology. I lectured there briefly in the mid 80's .
15% of the sand used was substituted with the charred grounds . An impressive increase in compressive strength that I find hard to understand . Still if it's a viable process the savings in material , reuse of waste and the weight reduction of the finished mix are real advantages .

Does it smell good?

 

[Adam from WI]

Does it smell good?

No, smells like someone left the empty pot with the burner on.

 

[Ultradog MN]

Does it smell good?

If you watch some cops/bad guys videos on youtube you'll see the perpetrators face down on the concrete while they are getting hand cuffed. Maybe ask them?

 

[Mike(NEOhio)]

Might give the concrete a nice color. Maybe a new way to recycle used coffee grounds.

 

[Charles in Aus.]

Might give the concrete a nice color. Maybe a new way to recycle used coffee grounds.

Melbourne likes to style itself as the coffee capital of the world.
A fairly conceited attitude really, though I will say that coffee in some countries is decidedly underwhelming in comparison . Starbucks is considered the province of tourists and fools here.
That said, coffee waste is huge , many schemes for its use have been tried , if this works then it's a win for all .

 

[MarkB_MI]

I know you can make coffee from chicory, but chard coffee is new to me. Where can I get some?

 

[a49deere]

I know you can make coffee from chicory, but chard coffee is new to me. Where can I get some?

Maybe it's made from the Swiss chard in ones garden!

 

[Charles in Aus.]

Maybe it's made from the Swiss chard in ones garden!

Not likely , the concrete would have air pockets and resemble ' Swiss Cheese ' .

 

[Stephen Newell]

We were reading that Australia tech's using oven chard at 350 C coffee grounds to increase the compression strength of concrete 29 percent.
Might have give it an ultimatum test in northeast Ohio.

Engineers are always screwing things up. It makes no sense to put anything in concrete that will decompose. The sand, gravel and portland doesn't