Portland cement
8 statements across 1 episodes · 4 bullish · 0 bearish · 1 people on the record · first statement Nov 17, 2022 by Leah Ellis · said 16 times in 1 episodes since 2022 · across every show →
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brought up most by Shayle Kann (8), Leah Ellis (8)
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2022 16 mentions in 1 episode
Everything said about Portland cement, oldest first
Nov 17, 2022 neutral
Nov 17, 2022 positive
Nov 17, 2022 bullish
Ellis: Sublime achieves standard strength without high-temperature kiln chemistry
“So, you know, we don't use a thermal process in the kiln. So, you know, we don't have 1500 degrees Celsius, and therefore we don't make that tricalcium silicate phase that's only stable at that temperature. But we still make, in the end, that calcium silicate …”
Nov 17, 2022 positive
Ellis: Construction standards are shifting from chemical composition to performance
“But now architects are moving towards performance based standards. So There's standards for blended cement, where it's 50% COT Portland cement, 50%, where almost anything you want, as long as it meets this performance-based standard, and there's a bunch of tes…”
Nov 17, 2022 positive
Ellis: Tricalcium silicate gives Portland cement its high early strength
“Portland cement contains a very special phase called tricalcium silicate, which is only stable at around 1500 degrees Celsius. So as it falls out of the kiln and is quenched, this tricalcium silicate phase is sort of frozen, and that phase is what leads to Por…”
Nov 17, 2022 neutral
Ellis: Concrete absorbs CO2 over centuries, acting as a carbon sink
“Cement, Portland cement does recarbonate over time. So if you have like a piece of pavement, for example, it will continue to absorb CO₂ from the atmosphere over timescales of, you know, Decades to hundred years or millennia will totally turn back into calcium…”
Nov 17, 2022 neutral