The Rural Housing Knowledge Network featured in yesterday’s blog post is a treasure trove. I doubt most readers will spend an hour or more surfing the sites we profile, so I decided to feature one story on their website.
“Rammed earth is one of the oldest construction techniques using earth or soil. Together with other techniques which use un-baked earth such as in adobe bricks or cob, rammed earth buildings have a continued history in many regions of the world. In India, this has been traditionally used in many rural areas all over the country. Simply speaking, rammed earth walls are constructed by putting damp earth in between two forms and ramming the earth into a high density mass. The two sides of formwork are erected and secured together by tie rods to provide resistance to the outward thrust on the formwork during the ramming process. The formwork for rammed earth can be fabricated using a steel or wooden frame with plywood or metallic sheets, depending on specific requirements of house design and also the type of finish needed.
Typically, formwork is sized for rammed earth section of length upto 8 feet, height of wall 2’ and wall thickness of 9”.
In this method, earth is rammed in smaller blocks of 2 feet length, using formwork which can easily be installed and shifted to adjacent sections of the wall.”