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Cite as Citation reference for the source document. Theresa K. Meyer, Nagendra G. Tanikella, Matthew J. Reich, Joshua M. Pearce. Potential of distributed recycling from hybrid manufacturing of 3-D printing and injection molding of stamp sand and acrylonitrile styrene acrylate waste composite.Sustainable Materials and Technologies 25, 2020, e00169<ref> open access

In the Upper Peninsula of Michigan, over 500 million tons of copper rich rock were removed from mines and treated in chemical baths to extract copper. Toxic substances have been seeping into the watersheds from the resultant waste stamp sands. Recent work on developing a circular economy using recycled plastic for distributed manufacturing technologies has proven promising, and this study investigates the potential to use this approach to form stamp sand and acrylonitrile styrene acrylate (ASA) composites. Specifically, this study found the maximum amount of stamp sand that was able to be added to waste ASA by mass with a single auger recyclebot system for compounding was below 40%. The mechanical properties of the composite were evaluated up to 40%, and the addition of stamp sand reduced the material's ultimate tensile strength by about half compared to the strength of raw recycled ASA, regardless of the percent stamp sand in the composite. However, this strength reduction plateaus and the tensile strength of the ASA and stamp sand composites can be compared favorably with acrylonitrile butadiene styrene (ABS) at any level. This makes waste ASA- stamp sand composites potential replacements for outdoor applications of ABS as well as some current ASA applications. These results are promising and call for future work to evaluate the technical, economic, and environmental potential for waste ASA - stamp sand composites.

Highlights[edit | edit source]

  • 10% stamp sand added to acrylonitrile styrene acrylate reduced tensile strength.
  • After 10%, the addition of more stamp sand does not impact strength significantly.
  • The ASA stamp sand mixture has around half the strength of raw recycled ASA plastic.
  • Failure during tensile testing was not due to a concentration of sand grains.

Sand plastic composites[edit | edit source]


See also[edit source]

RepRapable Recyclebot and the Wild West of Recycling[edit source]


Recycling Technology[edit source]

Distributed Recycling LCA[edit source]

Literature Reviews[edit source]


Externals[edit source]

  • Economist article on U. of Washington's HDPE boat,
  • Another possible solution - reusable containers [1]
  • Commercial
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