Biological Concrete

[JAE]

I'm a little skeptical about this.

http://www.theplaidzebra.com/moss-g...-co2-insulates-and-is-also-a-vertical-garden/

The concrete mix apparently uses a low ph (around 8) which is slightly acidic...thus potential for rusting in any attached or embedded ferrous material.
They also use a three layer system (structural concrete, then a membrane, then the "biological concrete" that absorbs and traps water for the little groweys.

What about freeze thaw in colder climates?


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[TehMightyEngineer]

Most moss does not care for direct sunlight exposure from my understanding, I don't even see it being feasible from a gardening standpoint.

However, if you used fiberglass or stainless steel rebar/embeds then perhaps this could work. I'd actually love to try it out.

Professional and Structural Engineer (ME, NH)
American Concrete Industries

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[ornerynorsk]

My concern would be what do the filaments and rhizoids do to the surface after x years? There is a higher likelihood of lichens taking up residence than moss, imho, which would be undesirable. Isn't the goal to have organisms not growing on your concrete surfaces?

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.