How durable is Rammed Earth?
Accelerated erosion tests have been undertaken by the CSIRO and the Natural Building and Technology Centre. This involves ramming a test block of your chosen earth, which is exposed to a high pressure water jet for a set time. Most samples will pass this test when stabilised with as little as 5% by weight (2.5 % by volume) of cement. Some local Councils may require this test to pass your development application.
