Sharing information and promoting earthbag building
From Superadobe, created by the Iranian Nader Khalili, was developed Hyperadobe by Fernando Pacheco of EcoOca in Brazil. The big difference between the two is that Superadobe uses woven polypropylene bags with barbed wire between the layers, whereas Hyperadobe uses a knit raschel, the same material used in packaging fruit. This leads to less cost compared to the poly bags.
Raschel is a knitted fabric which resembles hand crocheted fabrics, lace fabrics, and nettings. Raschel warp knits contain inlaid connecting yarns in addition to columns of knit stitches.
The raschel need not be burned to receive the plaster; Fernando works it as a "roughcast" to receive natural plaster. With vertical walls there is no need for barbed wire between the layers because with the open netting the soil of the bottom layer is merged with the new layer above.
The layers of Hyperadobe begin with the soil chosen for the work, which is generally about 70% sand and 30% clay, but this can vary. It must have a good moisture content, neither too wet nor too dry, and this comes with practice.
The funnel should be held with both hands at chest height. Roll out a little of the bag, fold the tip in your direction near where the layer will start. Step on the tip to dispense the soil at this point so you have full control of the material.
Overlaying courses is very important.
The funnel was made from an old fridge side. The bag fits tightly around the funnel, but it should not be too tight nor too loose, so that the bag does not get caught on the funnel or fall too quickly when placing the soil in the bag.
When you come to the end, give the bag a good shake to consolidate the soil, twist the tip of the bag, and put it under the layer. Then you can just start another layer that connects with the previous layer.
We raised the walls evenly throughout the house.
Everything we do comes from the intuitive, and we are moved by our love of Earth, which feeds every moment of our lives.
The above video shows the construction of a cloakroom and a bathroom at EcoOca - Brazil. The technique was developed by Fernando Pacheco, engineer, and it is called HyperAdobe. It is a more ecological option to the Superadobe technique.
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