this post was submitted on 28 Oct 2023
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Solarpunk Urbanism
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A community to discuss solarpunk and other new and alternative urbanisms that seek to break away from our currently ecologically destructive urbanisms.
- Henri Lefebvre, The Right to the City — In brief, the right to the city is the right to the production of a city. The labor of a worker is the source of most of the value of a commodity that is expropriated by the owner. The worker, therefore, has a right to benefit from that value denied to them. In the same way, the urban citizen produces and reproduces the city through their own daily actions. However, the the city is expropriated from the urbanite by the rich and the state. The right to the city is therefore the right to appropriate the city by and for those who make and remake it.
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Somehow this video is missing the part where is shows the actual foam-crete structure inside...
But anyways, this kind of non-autoclaved foam-crete is very easy to make. Basically you only need cement and aluminum powder. The powder reacts with the wet cement to create gas that bubbles up the cement.
The main problem with this is that the result is very weak. So you either need to make some sort of ferrocement sandwich structure or cut it into smaller blocks to autoclave it for extra strength. The latter process is quite energy intensive and needs a large pressure vessel, but those autoclaved foam-crete blocks are quite commonly used as building material in Europe.
Yep, very very annoying w_w