06-24-2022, 05:55 PM
|
#6 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 28,693
Thanks: 8,144
Thanked 8,924 Times in 7,367 Posts
|
Quote:
White Portland cement
White Portland cement or white ordinary Portland cement is similar to ordinary, gray Portland cement in all aspects except for its high degree of whiteness. Wikipedia
|
Quote:
https://constructionor.com › pozzolana-portland-cement
Pozzolana Portland Cement: Types, Properites, Merits & Demerits
For the manufacture of PPC, pozzolana materials such as diatomaceous earth, opaline shales, tuffs, volcanic ash, pumice stone, fly ash are used. Properties of Portland Pozzolana Cement: Initial setting time = 30 min (minimum). Final setting time = 600 min (maximum). At three days 13MPa (minimum). At 7 days 22 MPa (minimum).
|
The famous Roman concrete used volcanic ash from one particular outflow at Pozzuol.
Quote:
https://en.wikipedia.org › wiki › Pozzolana
Pozzolana - Wikipedia
The designation pozzolana is derived from one of the primary deposits of volcanic ash used by the Romans in Italy, at Pozzuoli. The modern definition of pozzolana encompasses any volcanic material ( pumice or volcanic ash ), predominantly composed of fine volcanic glass, that is used as a pozzolan.
|
The whole PNW is smothered in volcanic ash.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
____________________
.
.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
|
|
|
|