Dr. Leah Ellis is the co-founder and CEO of Sublime Systems, an electrochemical clean cement startup. She discusses the material properties of their room-temperature cement alternative.
0:00 / 0:28exact quote · 28.7s
720p mp4 · rendered on demand · StarZero watermark
“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 hydrate. So the final hardened phase of cement and all that durability and compressive strength associated with it are the same. But we go about it In a different way that that's all at very, very low temperatures”
quote is from the automated transcript, cleaned for reading:
filler sounds and stutters are removed, nothing is rephrased. names can be misheard
(the analysis reads context, assessments check outside sources). how →
More from Leah Ellis
PredictionOpen · timeframe Oct 2029
Ellis: European carbon regulations will double the price of cement
“They realize this is going to, these regulations are going to double the price of cement in Europe, whether you're going to be paying for post-combustion carbon capture, or you're simply going to be paying the carbon price.”
Leah EllisOct 17, 2024▶ 7:21The complex path to market for low-carbon cement
Insight
Ellis: Low-carbon cement green premiums are negligible for building owners
“90% of the cost of cement being labor, and only five percent being materials costs, even, even as these new technologies for making cement you know, until they get to scale, they're going to have some sort of green premium associated with them, but that green …”
Leah EllisNov 17, 2022▶ 41:54Fixing cement’s carbon problem
Insight
Sublime CEO: Standards are not enough; concrete workers reject stiff mixes
“These performance-based standards, the ASTM, the ACI, all of these things are necessary, but not sufficient in the eyes of the concrete subcontractor, because they have to make sure it finishes in a way where it doesn't hurt that man's elbow, because if you ge…”
Leah EllisOct 17, 2024▶ 20:31The complex path to market for low-carbon cement
AssertionSupported
Ellis: Section 45Q provides $80/ton for point-source capture that Sublime cannot claim
“There is a 45 Q tax credit for, you know, it's like 80 dollars a ton for removing CO₂ from a flu stack, and we don't have that.”
Leah EllisOct 17, 2024▶ 32:29The complex path to market for low-carbon cement
Opinion
Ellis: Carbon capture is the only way to decarbonize Portland cement
“There's almost no way around that except for, you know, post-combustion carbon capture. If you're making Portland cement.”
Leah EllisNov 17, 2022▶ 17:53Fixing cement’s carbon problem
Insight
Ellis: SCMs can only replace about 30% of Portland cement
“So you can only blend about 30% in before you start reducing, you know, diluting the performance.”
Leah EllisNov 17, 2022▶ 24:12Fixing cement’s carbon problem
Made with StarZero
Turn any episode into a week of clips.
This entire site, over 200 episodes transcribed, diarized, checked and made playable,
runs on the StarZero media pipeline. Drop in your own episode and the podcast clipper finds the
moments worth sharing, cuts them, captions them, and reframes them for every feed.
We use essential cookies to make the site work. With your permission we
also use analytics cookies (Google Analytics and Mixpanel) to understand
usage and improve StarZero. See our Cookie Policy.
