|
Post by jeff on Oct 14, 2016 19:22:54 GMT
Idea I've been tinkering with, based off the RV we have and are about to remodel and move into...
|
|
|
Post by thebastidge on Oct 17, 2016 15:53:00 GMT
What kind of shell are you thinking of?
|
|
|
Post by jeff on Oct 17, 2016 19:20:45 GMT
FRTP Basalt rebar, Basalt mesh and Geopolymer Cement. Letting samples cure, before further experiments and trying to work a formula out to better strength, before testing for leaching and such.
|
|
ekahn
New Member
Posts: 1
|
Post by ekahn on Dec 12, 2016 21:45:49 GMT
Have you had a chance to see if the cured samples will work? I'm curious to hear the results.
|
|
|
Post by jeff on Dec 14, 2016 18:12:01 GMT
So far I simply have not had time, or spare energy to work on the formula. Eldest daughter just got married, yesterday, 2 kids in college that don't drive, their final exams, etc.,...
Have determined that I need more precise control of water additions, during the mixing. This is going to require a greater level of precision than the average DIYer tends to take. 'Looks like enough' probably means way too much water.
The next few weeks are still a bit crazy, going to a family Christmas, VA appointments, and putting a car in the shop, followed by Christmas, New Years, etc. After Spring semester starts back up, I should have space and time to get back to work on my projects.
By the end of February, I should be able to afford sheets of PVC, to attempt modeling the hulls, though that will also be a drawn-out process.
|
|
|
Post by bobdohse on Dec 18, 2016 16:52:32 GMT
Jeff - "By the end of February, I should be able to afford sheets of PVC, to attempt modeling the hulls, though that will also be a drawn-out process." - - - Have you considered using PVC (or other plastic) sheets as both a form for a concrete (or similar material) pour ... ... AND as the permanent shell (both interior and exterior walls) for your floating platform? Since plastics bond in a unique way - by melting layers into each other - an exterior surface of plastic could theoretically be maintained indefinitely by simply cleaning the old surface and then bonding (basically ... "melting") a new surface onto the old. I'm not saying this would work ... but has anyone studied that possibility?
|
|
|
Post by thebastidge on Jan 3, 2017 17:04:23 GMT
an exterior surface of plastic could theoretically be maintained indefinitely by simply cleaning the old surface and then bonding (basically ... "melting") a new surface onto the old. Interesting idea. I don't see any existing applications of this concept, and most plastics do change with exposure to elements over time (particularly ultraviolet light) which changes their chemical composition and physical characteristics.
|
|
|
Post by bobdohse on Jan 5, 2017 15:29:44 GMT
I'm not sure how much, if at all, UV waves would propagate through water.
Plus, there are additives that, mixed with plastics, negate the effects of UV on the plastics.
Given the potential of both of those thoughts ...
... some plastics (e.g., HDPE) bond at relatively low temperatures (HDPE at 265°F) and can be fused (even underwater) with ultrasonic welders.
So my thought (question) was to wonder if a plastic could be used both as the form for pouring concrete (much like retaining walls are currently poured) AND then become the waterproof wrap that could be maintained/repaired indefinitely.
If so, the concrete pour could be done incrementally (first the flooring, later the sides) because concrete seams would no longer be a source of leaks).
I'm just thinking out loud ... something not yet practical on TSI. 😉
|
|
|
Post by bobdohse on Jan 5, 2017 15:43:40 GMT
BTW - I created a small plastic scaffold out of HDPE ... and gave it to a friend to use in her pond to hold floating plants.
She used it to float a Spider Plant.
The plastic sank a little bit underwater, and then equilibrium was achieved and the plant's roots remained above water enough to survive.
This is a baby step toward a floating SWORD (Surface Wave Oscillation Refraction Device) ... relative to the discussion about creating a floating kelp or mangrove forest.
|
|
|
Post by thebastidge on Jan 6, 2017 16:29:42 GMT
So my thought (question) was to wonder if a plastic could be used both as the form for pouring concrete (much like retaining walls are currently poured) AND then become the waterproof wrap that could be maintained/repaired indefinitely. If so, the concrete pour could be done incrementally (first the flooring, later the sides) because concrete seams would no longer be a source of leaks). Well, there are a lot of means to seal concrete, but I would be more worried about structural integrity issues than leaks... That's one reason why geopolymer is interesting, as the literature seems to indicate it will chemically bond to previously poured geopolymer, not just make a mechanical joint.
|
|
|
Post by IsacCet on Jan 24, 2022 23:11:39 GMT
|
|
|
Post by IsacCet on Jan 24, 2022 23:13:30 GMT
|
|
|
Post by IsacCet on Jan 24, 2022 23:14:32 GMT
|
|