Natural building material using clay, sand, and straw for walls, ovens, and benches Recipe Details ### Materials Needed: - Clay soil (from subsoil layer) - Sharp sand (angular, various sizes) - Long straw (wheat, rice, oat) - Water - Mixing tarp (6'x8' minimum) ### Basic Recipe Ratios: - Clay soil: 15-30% of total volume - Sand: 70-85% of total volume - Straw: Added "to taste" after mixing ### Tools: - Wheelbarrow - Buckets for measuring - Tarps for mixing - Hoe for initial mixing ### Instructions: 1. **Test your soil**: Perform jar test to determine clay content 2. **Prepare clay**: Soak clay soil overnight in buckets 3. **Mix dry ingredients**: Combine clay and sand on tarp 4. **Add water gradually**: Create well in center, add water slowly 5. **Mix by foot**: Dance/stomp on mixture, rolling with tarp 6. **Form "burrito"**: When mix holds together when rolled in tarp 7. **Add straw**: Sprinkle chopped straw evenly, mix in by foot 8. **Final consistency**: Should be plastic, not sticky or crumbly ### Tests for Readiness: - **Ball test**: Forms ball when squeezed, minimal cracking - **Drop test**: Ball maintains shape when dropped from waist height - **Straw content**: Each handful should have long fibers throughout ### Applications: - Wall building (coil method) - Mortar for stone walls - Earth ovens and rocket stoves - Garden benches and raised beds ### Curing: - Allow to dry slowly (cover with damp cloth) - Avoid direct sun and wind initially - Full cure takes 4-6 weeks depending on thickness