Acetone and Styrofoam

The Acetone is not actually "dissolving" the Styrofoam. Here is what is happing. When styrofoam is placed in acetone, the long polymer strands are dissolved, releasing the trapped air and causing the structure to disintegrate. However, the insoluble crosslinked parts of the polymer keep the polystyrene from dissolving entirely, in much the same way as buoys on nets keep the entire net from sinking to the bottom of a lake. Once the acetone evaporates, you are left with a hard crosslinked polystyrene residue.

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Foam concrete
L.L.E.05.12.2012 Finally the official translation: A simple and inexpensive method to manufacture the foam needed to obtain the Aerate Concrete. For a 180l (about 120l course) concrete mixer I used one and a half bucket of cement, three buckets of sand and depending on how wet is the sand I added water (7-10l). And , of course, the foam. Recipe for foam is 3% foam agent diluted in water (theoretically). Basically I used 50 ml per liter of water, ie 5% and for a batch I used 1.5 l of 5% solution. Of course, if you put more cement the stronger the concrete will be, but I don't think that a proportion more than 50% cement will do any good. My impression was that the solution temperature influences the quality and stability of foam, but I didn't tried to study this thing. My impression was that if the solution is heated by the sun, the foam was more "fluffy" Of course the recipe can be changed, but I'm happy with what came out. Probably a density of 900-1000 kg/cubic meter The mesh is aprox. 2x2mm aperture with 0.5mm wire diam. and the frame is a 150x50mm rectangle. Of course, all this elements of the "foam generator" are chosen without any study, so I think each one can try other dimensions. L.E. Foam Concrete isn't used for structural components of buildings (as far as I know). It is used only for insulation and as a filling material. In my case I used it for a terrace over a wood structure of a garage. I used it because it's light and because the wood terrace was very hard to waterproof the building. Over the concrete, the terrace was waterproofed with bitumen membrane. There are two years now (2011), the terrace is still waterproof and the garage still standing. Of course, no major earthquake but I' m confident. Un mod simplu si ieftin de producere a spumei necesare la obtinerea BCU. Pentru o betoniera de 180l (aproximativ 120l util) am folosit o reteta de 3 galeti de nisip, una jumate de ciment, apa in functie de cat de ud e nisipul (7-10l), si spuma. Reteta pentru spuma e 3%spumogen si restul apa (teoretic). Practic am folosit 50 ml la un litru de apa, adica 5%, iar pentru o "portie" de BCU am folosit 1,5 l de solutie 5% spumogen. .Impresia mea a fost ca temperatura solutiei influenteaza calitatea spumei, dar nu am incercat sa studiez lucrul asta, ci doar am constatat ca daca solutia se incalzea de la soare, spuma era mai "pufoasa" Bineinteles ca reteta poate fi modificata, dar eu sunt multumit de ce a iesit. Probabil un BCU de 900-1000 kg/mc, destul de stabil mecanic (mai stabil decat ce am vazut pe la comerciantii de blocuri de BCU).

How to make a Paper Airplane: BEST Paper Planes in the World - Paper Airplanes that FLY FAR | Martin
How to make a paper airplane - paper planes. How to make the best paper airplane in the world. More paper airplanes that fly far → 🔥 🔥 ▶ BEST PAPER AIRPLANES: DtaGXw- ▶ THESE FLY FAR: R5ZAg7d ▶ THESE ARE EASY: 8e574RO ▶ THESE FLY BACK: mhEtufO ▶ THESE FLY OUTSIDE: AfgRCxn ℹ More categorized playlists on my channel page: --------------------------------------------------------------------------- --- REQUIRED MATERIAL Copy paper - I get it on Amazon, here is the link: For people in the USA * For people in the UK * For people in Canada * Paper Airplanes fly far if they are folded and thrown properly. So the best paper airplane is made by following these tips: FOLDING • Pause the video after every step! • Both sides must be symmetrical. You cannot do it? Ask your father for help. THROWING • Throw in different angles (10° to 20°) and intensities (soft to medium). Are you outdoors? Any paper plane can only fly well on dry and windless days (even mine). * This is an affiliate link. I get a commission for purchases made through this link. This does not change anything for you and Amazon earns less profit from your purchase. Thank you! :) --------------------------------------------------------------------------- --- How to make a paper airplane is a weekly video series. And I care about your thoughts. Please give me your feedback. All my videos are completely self-produced: I do the filming, editing... all on my own. My dream is to publish my own paper airplane book! Please support me: Comment - Share - Like my videos. That really has a positive impact and means the world to me. It also helps me making more videos! I am soo happy to have you here! Thank you ♥ --------------------------------------------------------------------------- --- Subscribe to not miss my new videos uploaded every other Thursday: → Follow me on: --------------------------------------------------------------------------- --- © Copyright 2013-2137 Mahir Cecen. All rights reserved. --------------------------------------------------------------------------- ---

Cutting Glass with Acetone
My friend and I decided to try cutting glass with acetone, string, and a lighter. We had seen several how-to videos on youtube, and thought we'd give it a shot. The flames were a bit bigger than I expected, and it was a little windy, but the project was a success!

Swimming with the Devil - see 1:10
Zambian Bungee Jump Swing Typhoon in Taiwan Japanese Swinging Fire Festival ----- The closest to death I've ever been - Devil's Pool at the top of Victoria Falls, Livingstone, Zambia. January 2, 2010. The spot we're all sitting in is called Devil's Pool, hence the video name. To reach it, we first took a small boat to Livingstone island: a tiny island near the edge of Victoria Falls. We then swam across the top of the falls for about 20 minutes, stopping every few meters to swim directly up stream because the current would drag us closer to the edge as we tried to swim perpendicular. The three black men (the two sitting on either side and the third holding my camera) were the guides we hired through our hotel (the Zambezi Sun) and some of the bravest souls I've ever met. I can't remember exactly how much but I think it was $50 each, and well worth the investment. There were other locals who would take us for less, but inexperienced guides get tourists killed, which had happened the week. The guides knew exactly where to swim across the top of the falls, stop to rest, and swim up stream. One of them even carried one of the girls on his back when she had a panic attack while swimming across the falls. Most importantly, as you can see in the video, a guide sat on each side of the group to make sure we didn't wander out of the safe area (well safe-ish). There's a small underwater rock ridge which we leaned against to stop us from spilling over. That being said, fouling around will still get you killed, as I almost learned when I tried leaning over the falls to snap a self-portrait. I felt the water rush and my legs, which were planted to the floor, swing up with the current. I quickly decided I could live without a self-portrait. The third guide, the one who took the incredible footage with my camera, actually stood on the tiny rock ridge, leaning over to capture the precipitous drop and, yes, the double rainbow. Inconceivably stunning! He could have died with the smallest slip! And these guys do this every day. They were all tipped well. TJ from Toronto, CAN