Alternative Ceramic Supply


Materials
  1. Brick Rubble
  2. Granite Offcuts
  3. Dolerite Offcuts
  4. Broken Bisque
  5. Concrete Rubble
  6. Glass Sludge
  7. Wood Ash
  8. Bone Ash
  9. Marble Offcuts
  10. Oyster Shells


Bulk Buy
Ground Works


Info
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      7. Wood Ash

      Test tiles using wood ash glaze blends, fired to midfire (cone 6, left) and stoneware (cone 9, right). Materials were not added to clay bodies due to fluxing or invisibility. Glaze tests (top to bottom): wood ash glaze alone, +10% brick, +10% concrete, +10% brick & concrete, +30%  more wood ash.


      FIRST LIFE  

                  ORIGINUnknown firewood source
      Red gum wood ash

                 MEASUREMENTSn/a

                 COLOURAsh - Light grey
      Charcoal - Dark grey to black, white edges
                 TEXTUREExtremely fine

                FINISH / FEATURESn/a 

      SECOND LIFE 

                 COLLECTION LOCATION -37.77707138400033, 144.9711237296245

                  DATE OF COLLECTION
      October 2023

                  SUBURBBrunswick East

                  COUNTRYWurundjeri Woi Wurrung

                  LOCAL COUNCILMerri-Bek


      MATERIAL INFORMATION

                 COMPOSITION Composition of firewood ash wastes contains variable amounts of silica (SiO2 = 1.86 -68.18%), alkaline earth oxides (CaO = 5.30 -72.39% and MgO = 1.10 -13.11%), and alkaline metal oxide (K2O = 4.51 -24.00%), as well as several others oxides in smaller amounts 

      POTENTIAL APPLICATIONS

                 SUBSITUTE FOR
      Any commercially packaged ash
                 IN CLAY BODY
      Lower the melting temperature of the clay. Note: may cause slumping

                 IN GLAZE      Test as 1:1 substitute for ingredients listed above in a glaze recipe

      Use for source of silica and flux


      PREPARATION

                 CALCINATION
      n/a
                 CUSTOM PREPARATION
      Sieve to remove charcoal pieces and debris. Washing optional (removed alkali salts which can make the wood ash less caustic) 
                 MINIUMUM REQURIED EQUIPMENT
      n/a

                 RATING
      (Scale of 1 to 5, with 5 being hardest)
      n/a

                 NOTESNo crushing or calcination required

      SAFETY &
      HANDLING

                 HAZARDS
      Silica dust, highly soluble and caustic.
                 SUGGESTED PPE
      Respirator
      Gloves
      Eye Protection

      SOURCING

                 SEARCHING FOR SUPPLY
      Contact woodfire bakeries and restaurants (pizza and bread ovens), and venues with fireplaces. 

                 WHAT TO BRING WITH YOU
      Bucket/container/plastic bag
      Gloves (caustic)
      Mask 
      Shovel or scoop

                 QUESTIONS TO ASK
      What type of wood is it? What is the origin of it? Are there other contaminants in the fire (like oil, food, salt)?

                 RECYCLABILITY AS-IS
      Landscaping/Gardening
      • Use as mulch or addition to soil for balancing ph
      • Compost
      Cleaning

                 COLLECTION RECOMMENDATIONS
      Call and ask, if yes, bring a labeled bucket or box with your name and number