Traditional Rammed Earth Blocks

In the Atlas Mountains of Morocco, Berber tribes keep on using techniques that are several years of age to make their rammed earth blocks. In the typical process, the outline of the building is followed on the ground or some sort of foundation is constructed. Wooden blocks, about 2 feet high and 6 or 8 feet long are braced or tied around two end boards that set the wall thickness (commonly 1,5 to 2 feet), while damp earth from on or close to the building site is smashed into the structure. Loose earth is laid in shallow layers (around 4 to 6 inches profound) in the form, and after that tamped with around a 10 pound piece of wood mounted on a long handle. The hand rammer is frequently lifted 1 to 2 feet in the air and afterward released onto the wet soil layer. The rammer ought to be sufficiently substantial to slam the earth with its mass, yet sufficiently light for the worker to lift it many times each day. The blend of vibration and compaction strengthen the earth into a stone like cluster. As the soil gets to be compacted, the sound from the rammer changes from a dull crash to a ringing sound, which sounds that it’s an ideal time to move to the following layer of soil. Typically, once the 2 foot high form has been smashed to the top, the structure is moved in row on same level of the wall. After the first wall layer is rammed all the way around the perimeter of the building, then worked around the edge to frame the second layer, et cetera. Structures are put in the wall to close off space for openings, for example, windows and entryways, and the earth is rammed around the structures. Wooden bars span over the highest points of window and entryway openings.