How are rammed earth walls constructed?

Rammed earth walls are constructed by compacting a soil-cement mixture. This method involves layering damp soil, which typically includes a mix of clay, sand, and gravel, along with a small percentage of cement to help bind the materials together. This mixture is then compacted in layers using a heavy tamper or mechanical rammer, which compresses the materials to achieve a dense and solid form.

The process creates walls that are not only sturdy but also have excellent thermal mass properties, making them energy-efficient and environmentally friendly. The compacting process ensures that the material is tightly packed, which enhances the durability of the structure and minimizes issues like settling or bulging over time. This technique has been used for centuries in various cultures and offers a sustainable building method that connects with the natural environment.