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A comment on Kenyan recycles plastic waste into bricks stronger than concrete. Parent comment

Re:Kenyan recycles plastic waste into bricks stronger than c... by kaonwarb on Wednesday February 10, 2021 @04:26PM (#26095034)
In a college engineering class we produced (in teams) rockets emitting mach-diamond exhaust consisting of nothing more than HDPE rods bored in specific patterns, supplied with pure oxygen, and ignited.
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Re:Kenyan recycles plastic waste into bricks stronger than c... by rootusrootus on Wednesday February 10, 2021 @05:12PM (#26095504)
> supplied with pure oxygen

That is key. A lot of things make a hell of a flame when you supply them with pure oxygen.

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Re:Kenyan recycles plastic waste into bricks stronger than c... by mikewarot on Wednesday February 10, 2021 @06:32PM (#26096306)
A thermic lance is a steel tube with pure oxygen fed down the bore. Here's how to make one out of a length of automotive brake line. https://youtu.be/EA-VCaBUsCA
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