Formwork was documented in Eastern province, but not much else was seen. This was done at a very small scale basically being large blocks and with no binders.

The main component is the soil on-site, which makes this a very sustainable building technique.

The walls are formed with plywood. Ideally, it would be better if the forms can be re-used.

A binder is added to the mixture, either concrete or plaster of Paris... calcined gypsum. The binder helps to set the mixture as well a giving the walls compressive strength.

Form work, or earth rammed construction is one of the oldest building techniques

Soil is often gathered from termite mounds due to the high silica content resulting from the burroing of the temites.

The technique is quite basic, add the ingredients to create the correct mixture then pour into the formwork. The poring will be done in stages to allow for proper setting.

When the walls have set, the forms are removed.

The mixture is added till it reaches the top of the form

The walls are poured and compacted in stages. This will allow the wall to dry and harden evenly.

One great aspect of earthen walls is it's thermal mass properties. In the day the walls absorbs heat which it radiates back at night.