Found this recipe on Tim's informative web site with lots of great pictures:
- 3 parts Paper (The paper used can be almost anything; newspaper, junk mail, cardboard, etc.)
- 2 parts clay/dirt and sand
- 1 part Portland cement
- And here's what Tim Pye has to say about Papercrete:
Papercrete, aka fibrous cement, was originally patented in 1926, but it was not considered to be commercially viable. Today it is being rediscovered as a "new" alternative building material. Papercrete has been termed by some as a "modern day adobe." Papercrete can be made into blocks or poured into forms to make a monolithic wall. The material is homemade and consists of paper (3 parts), clay/dirt and sand (2 parts), and Portland cement (1 part). The paper used can be almost anything; newspaper, junk mail, cardboard, etc. So much of our daily consumables are surrounded with paper and take up millions of tons per year in our waste dumps. All the paper you need is free for the asking. Sand and/or sandy dirt is usually found on site. One way to recycle paper is to build with it. Here's why………..
SOME PROPERTIES OF PAPERCRETE
INSULATION VALUE - up to R-2.8 per inch, depending on density and ingredients (comparable to fiberglass at R-3.0 per inch). LIGHTWEIGHT - most papercrete weighs 15 to 20 lbs. per cubic foot, depending on density and mix. (Concrete weighs137 lbs. per cubic foot.) Almost anyone can lift and build with papercrete blocks. HAS COMPRESSIVE STRENGTH AND TENSILE STRENGTH - papercrete walls can support roof loads (not yet code approved) and can span across window and door openings with little or no header, if desired. TERMITE PROOF - termites do not touch papercrete! FIRE RESISTANT - papercrete cannot burst into flame. If exposed to intense heat and fire it will smolder slowly until extinguished. After the fire is out, simply dig out the char and patch with papercrete. ABSORBS SOUND AND VIBRATION - may do well in earthquake prone areas. ABSORBS WATER INSTANTLY - not a plus for housing projects. After construction is complete and the walls are dry, the exterior needs to be sealed. A papercrete stucco mix can be applied without the need of chicken wire, and then can be painted.