File:Amerhidil Qasbah.jpg

English: This 17th-century qasbah in the Skoura palm grove in Morocco is built with the traditional pisé, also known as pisé de terre, or rammed earth. This is an age-old building method which has re-emerged in recent years as people seek low-impact building materials and natural building methods. Traditionally, rammed earth buildings are common in arid regions where wood is in scarce supply. Rammed earth construction entails compressing a damp mixture of earth that has suitable proportions of sand, gravel and clay (sometimes with an added stabilizer) into an external supported frame that molds the shape of a wall section creating a solid wall of earth. Traditional stabilizers such as lime or animal blood were used in the past, but cement has become the stabilizer of choice. After compression the wall frames are removed and require an period of warm dry days after construction to dry and harden. The structure can take up to two years to completely cure, and the more it cures the stronger the structure becomes. Source: Wikipedia