Rammed Earth Foundation
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Foundations out of rammed earth plus stabilizer are very low-cost but not very structurally stable and not very resistant to moisture.
Auroville Earth Institute
This is a protocol for building foundations of rammed earth. It is from the Auroville Earth Institute. See full description here (website pdf-copied [xxxx here]).
Basics:
- used in Auroville for all kinds of buildings (up to 4 floors high).
- soil is excavated, sieved, then sand added
- 5 % by weight of cement (500 litres soil + 200 litres sand = 1 bag cement, 50 Kg)
- start ramming
Links
- Page from "Appropriate Building Materials: a Catalogue of Potential Solutions" "Rammed earth foundations"