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Comment by skohan | Hacker News Reader

Very cool project!

A couple questions:

1. How does your synthetic limestone compare to natural limestone? Are there any important performance differences in terms of the material properties of the resulting concrete?

2. What are the biggest bottlenecks/obstacles in terms of scaling this to the point it could replace a significant portion of natural limestone used today?

Edit: do you have any blog posts/more information about what you're doing? I would love to share this around, but unless I'm missing it your site is very light on details.

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Thanks! 1. We are entering the product testing stage with our cement producing parnters in the next few months, so I'll have a better answer for you then. But from a chemical composition point of view, our product is purer than mined limestone and so should perform better. 2. Biggest bottleneck from our perspective is nailing planning permission to build our plants quickly enough to supply cement producers.

Unfortunately no blog post or anything like that just yet. Website is very light on details for now, we haven't prioritised updating (+ some patent considerations).

Yeah cool! If you have a twitter or any other way to follow you guys I would love to - I work at a sustainability-focused startup and I know a lot of people who would be interested in this, and not all of them would be in the HN audience.

Could you share more details about your startup?

If you wish to do it privately, check links at my bio.

Best!

Will DM you

Would love to learn more details too! Info in bio :)

Love the enthusiasm to share! This is a bit of a coming out party for us, so not much out there in the way of public information. We'll add to that as it comes higher on the list of priorities

> 2. Biggest bottleneck from our perspective is nailing planning permission to build our plants

How do you get permission to mine seawater? Its kinda of a weird question and I imagine its very country dependent.

Very intersting project.

I suppose it must be similar to permissions to use seawater as coolant, or for producing freshwater from it.

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