Peak oil... Again...!!!

[cRiPpLe_rOoStEr]

Originally Posted by freebeard

I'm concerned about growing hills of Spent Shale

That's sure a matter of concern. Couldn't it be used to make cement like it's done with coal ashes? BTW nowadays some ethanol breweries that burn the sugarcane bagass for heating and co-generation are also reusing the ashes to make cement.

[freebeard]

Cement or concrete aggregate? I saw that's it's used for aggregate, but I can't find the reference. It's probably uneconomic to move it (as a bulk material) to the point of use.

[redpoint5]

Originally Posted by freebeard

That's fracking. I didn't know until I looked that there is an in situ method using heat instead of water.

https://en.wikipedia.org/wiki/Shale_oil_extraction

Ahh, I didn't know what the shale I was talking about. I've got no fracking idea what I was thinking. I'm prepared to have strong opinions on the subjects though!

Originally Posted by freebeard

Cement or concrete aggregate? I saw that's it's used for aggregate, but I can't find the reference. It's probably uneconomic to move it (as a bulk material) to the point of use.

If it's an environmental hazard and the waste is sufficiently regulated, then using it as an aggregate would be an economical way to deal with it.

Then again, where does old aggregate go to die?

[cRiPpLe_rOoStEr]

Originally Posted by freebeard

Cement or concrete aggregate? I saw that's it's used for aggregate, but I can't find the reference. It's probably uneconomic to move it (as a bulk material) to the point of use.

I was told it was used to make cement, but it was some 18 years ago when I went on a school trip to a coal-fed powerplant. Since there is at least one cement factory nearby, it might be true.