Using ferro-cement (iron and cement), or nylon-cement (nylon fishnet and cement) one can make domes and tunnels that are functional and esthetically more natural-looking than boxes are. As tunnels and rooms grow on and around each other, the structure starts to look like the nests made by termites.
The same iron rebar framework that supports the cement can support the growth of vines, which provide shade and food here in the tropics. Global warming and an era of agricultural failures may be on its way. Shade and food are good. The trellises can be converted into cement structures later.
Using examples from two houses I have built, this instructable will show how to get started today on a termite nest city of tomorrow.
Step 1: Materials
To build a termite nest city, you will need a lot of sand and cement. Iron rebar is used to define the basic forms. Chicken wire, or nylon fishnet covers the rebar form and provides a fine enough mesh for plastering with cement. The cement to sand ratio is the standard 1:3 mix used for plastering.
Since iron rusting is a problem with the rebar, longevity is improved by painting the rebar first with a good primer and rust preventative paint. If cost was not a factor, one could use stainless steel, or perhaps something like Cor-ten steel, which forms an oxide coat that protects from further oxidation. It would be ideal to use immortal materials, so that a city could keep growing without ever having to use demolition on the old parts.
The old parts of the city, at the bottom, would be protected from the weather by the younger parts above them, improving their longevity.