Two very short reads

[SteamyTea]

Another monthly temperature record

16 May 2024

 

Global temperatures last month, which included a heatwave in New Delhi, India (pictured above), were the highest ever recorded for April. This makes it the 11th month in a row to set a record, according to the European Union’s Copernicus Climate Change Service. The average global surface air temperature was 15.03°C (59.05°F).

 

Olivine lets cement go carbon neutral

9 May 2024

 

Replacing 35 per cent of the regular cement in a concrete mix with silica derived from an abundant mineral called olivine would produce a carbon-neutral cement. Subbing 40 per cent or more would make the final cement carbon negative (Royal Society Open Science, doi.org/mtvt).

Edited May 19, 2024 by SteamyTea

[JohnMo]

Interesting - we are doomed

 

Interesting, but how do you get hold of it and would your structural engineer and BC be happy?

[saveasteading]

54 minutes ago, SteamyTea said:

abundant mineral called olivine

Abundant. Enough for Norway, whence it comes, or for the world? As if Norway needs more income from the ground.

 

On further thinking, it doesn't matter who uses it if there is reduced carbon released.

[SteamyTea]

5 minutes ago, saveasteading said:

Enough for Norway, whence it comes

Is serpentine similar, we have loads of that in Cornwall, and know how to make an area an industrial wasteland better than most.

[sharpener]

On 19/05/2024 at 18:30, SteamyTea said:

and know how to make an area an industrial wasteland better than most.

 

At least the mine engine houses perched on the cliffs are quite picturesque, unlike the slate quarry remains at Blaenau Ffestiniog. And the Eden Project is an imaginative use for a humungous clay pit.

 

Promising new process for recycling old concrete into new cement here https://www.cam.ac.uk/stories/cement-recycling.

 

 

[SteamyTea]

7 hours ago, sharpener said:

Promising new process for recycling old concrete into new cement here https://www.cam.ac.uk/stories/cement-recycling.

That is interesting, lower CO₂ cement and steel at the same time.

 

I read, or heard, that ashphelt/Tarmacadam is the most recycled material by volume, mass and price. Just need to start working on that.