Giant Chinese 3D printer builds 10 houses in just 1 day (PHOTOS, VIDEO) — RT News

Posted by $ rockymountainpirate 10 years, 8 months ago to Technology
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While the current batch of houses are standalone, one-storey structures, the company hopes its technology will eventually be used to make skyscrapers.
SOURCE URL: http://rt.com/news/155220-3d-printer-houses-china/


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  • Posted by Robbie53024 10 years, 8 months ago
    Hmmm, I guess you can call that 3D printing. As a mech eng, I'd like to see some structural data on the materials and how they hold up over time and as subjected to various environmental conditions.

    I think that this type of application could be used for Insulated Concrete Forms construction. I used that in my latest house and the constraints are in what forms are available from the manufacturers, which are usually straight, 90 and 45 deg corners. This would allow the creation of forms that could take any shape. The other issue for ICF is the time of assembling. These sections could be created in much larger modules that would go together much faster. An interesting idea.
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    • Posted by jcabello 10 years, 8 months ago
      Hello Robbie,
      Could I ask you, did you build your own house or did you use a building company? I might have a house built for me here in Colorado. Is ICF very expensive compared to traditional wood frame? Would you recommend some builder?
      Thanks!
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      • Posted by Robbie53024 10 years, 8 months ago
        I did a combo of both. I hired a contractor to do the majority of the house - but my son and I did the attached garage portion. We could have done the whole thing but would have been more time than I could devote to it. The 3 1/2 car (and extra deep) garage we did in one weekend of putting up the forms and another day to pour the concrete.

        I built in the spring of 2006, which was after hurricane Katrina down south. Most of the wood building materials were going there, so were higher costs in WI. Overall, the ICF was about the same as 2x6 exterior wall stick frame construction at the time.

        Benefits are that the foam itself has R22 insulation value, and the concrete is a huge heat sink - so takes a long time to heat up in the summer and retains heat quite well in the winter. And it's quiet!

        Downside is that the walls are 10" thick, so your window boxes need to be extra deep (all the major manuf's offer this so not a problem). I also found that how the concrete gets poured (the amount of lift in each pour) matters a lot. My contractor probably had too much height per lift, which caused the bottom to bulge. So the window boxes extended different amounts from bottom to top (I ended up having to trim them by hand as I installed the trim, which was laborious).

        In my area there were only 3 builders who were familiar with ICF - that was back in '06. I'd check your local area for builders and then go see their work. It can go more rapidly than stick framing, so when they say they're working, it won't be for long.

        If you have the time and inclination, you can do it yourself. I'd spend some money to have an experienced contractor come check your work out before you pour - and maybe even do the pour itself as if you have a blowout (a weak spot that pulls apart and leaks cement) you need to have many hands that know what to do quickly.

        I also installed steel trusses for the flooring on 1st and 2nd level which can be directly embedded into the concrete.
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        • Posted by Non_mooching_artist 10 years, 8 months ago
          That sounds like your house will withstand pretty much anything nature has to throw at it. Even the big bad wolf. ;-)
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          • Posted by Robbie53024 10 years, 8 months ago
            Before I built my house I saw a pic of the aftermath of a tornado (your big bad wolf) that went through a neighborhood. There was one house still standing, and the rest were totally demolished. While it had some roof and siding damage, it was pretty much intact. You probably guessed it by now, it was an ICF house. That's not the reason for me choosing this construction, but it certainly didn't dissuade me. That neighborhood that was destroyed is only about 50 miles south of where I live, so a reasonable possibility of also getting hit.
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            • Posted by Non_mooching_artist 10 years, 8 months ago
              Wow, clearly a great choice, considering the type of weather you get in your neck of the woods. It's a really amazing thing to watch a house go up from start to finish, especially such an interesting one.
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              • Posted by Robbie53024 10 years, 8 months ago
                Mine was the second lot sold in the sub, and first house built (26 lots in the sub). Nobody pays much attention to the other houses as they go up, but I had darn near the entire county come by as my "Styrofoam" house was going up.
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            • Posted by Hiraghm 10 years, 8 months ago
              I doubt even your house would survive a direct hit from an F4 or F5. But I imagine the odds are extremely long it would get a direct hit from one that powerful, in WI.

              (Amusing side note: last night the weathermen were so anxious to turn the storm into tornadoes, one declared the high winds downtown an "F0")
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        • Posted by Hiraghm 10 years, 8 months ago
          Is this like Dryvit?
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          • Posted by Robbie53024 10 years, 8 months ago
            No. More like hollow lego blocks. They have tabs/slots that fit together and you build the shell of the house with them. You use low expansion insulating foam to "glue" them together, and metal clips to lock them together (as well as provide an anchor for things like siding on the outside and drywall on the inside. You add rebar horizontally and vertically in the channels for strength and pour concrete into the channels. If you melted the Styrofoam, it would look like a big latticework of concrete cylinders - going horizontal and vertical. 6 inch dia cylinders with 2" of foam at the thinnest part inside and outside. If you cover with stucco, it can go directly onto the foam.

            I used Reddi-Wall - http://www.reddi-wall.com/ProductProfile...
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    • Posted by freedomforall 10 years, 8 months ago
      Been planning to build a dome from AI Domes in FL. They use a similar process for their components. Combines the benefits of ICF with strength and wind resistance of domes.
      See:
      http://www.aidomes.com
      I would think that 3d printing would make production of ICF panels more efficient and possibly cheaper.
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    • Posted by $ Commander 10 years, 8 months ago
      With a little laser interferometry and a couple of servos .... a "placer" could be converted for field ops. I don't trust the optic guidance I've seen so far....terrible experience with a customers automated work cell. I calculated building three loaders for the price of their inoperable robot.
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  • Posted by $ Commander 10 years, 8 months ago
    I want to see the test data from 5, 6, and 7 magnitude quakes....especially the longitudinal data. Love a good idea.....always very conservative on the possibility of hurting folks. I worked on production of earthquake-proofing apparatus in the early 90's.....the parameters for safety are astounding. Love the idea for certain applications.
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    • Posted by $ blarman 10 years, 8 months ago
      Especially given their less-than-reputable track record even in construction without quakes.

      http://www.dailymail.co.uk/news/article-...
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      • Posted by $ Commander 10 years, 8 months ago
        I remember this....about 5 years ago I think. Notice the lack of re-bar in the fractured columns? I think I remember a diagram of hydrostatic heave being explanatory of the shear.
        I shall not use Chinese steel in my repairable business either. Had the microscopy done on samples of 1018, 1117, and 1045...granular structure was very inconsistent and loaded with high density pockets of concentrated carbon.....FRACTURE! I repair truck axle housing spindles....the thought of a set of dual wheels hurtling down the highway due to metal failure???....Not on my watch.....
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        • Posted by strugatsky 10 years, 8 months ago
          To add my two cents, I think it depends on the importance of the item being made. At the time when much of Chinese consumer industry was crap, they produced weapons of fantastic quality. I have several early SKS' (military versions) and others and the machining, fit, finish and accuracy are superb.
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          • Posted by $ Commander 10 years, 8 months ago
            Agreed on the importance of an item. My samplings were from 2004 to 2010. Interesting regarding timing of the quality.....Olympics.
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            • Posted by strugatsky 10 years, 8 months ago
              If the reports could be trusted, the first Chinese satellite launch failed because of a bad weld. They have made amazing progress and their current space technology seems to work well. They learn fast and constantly improve. China has now surpassed the US in GDP and will soon surpass in the standard of living. Overall, a Chinese citizen is freer than an American and far more educated and productive. No doubt in my mind that the future belongs to China.
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              • Posted by $ jbrenner 10 years, 8 months ago
                The president and provost of my university went to China a couple of years ago trying to establish university partnerships. They came to the same conclusion. The Chinese society is freer now than the US! Hard to imagine, but I have heard it from multiple sources.
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        • Posted by Robbie53024 10 years, 8 months ago
          To emphasize the point - a few years ago a semi travelling on the freeway north of Milwaukee "threw" a wheel with tire still mounted. It flew across the median and went right through the windshield of a doctor driving to work - killed him instantly. Lucky he didn't then careen into more cars and cause more damage. Steel wheel failed and mount area was still on the axle.
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          • Posted by $ Commander 10 years, 8 months ago
            If you take the I94 and I43/Hy 29 corridors from Milwaukee through the twin cities.....over 1000 sets of "lost" wheels per year. Most of these are maintenance related. Still, In a mature "industry" this is pretty high. I ask myself regularly if I would "drive" on the repairs I've just made. I'm asking similar question of these new buildings; Would I be willing to use / live in one? Under what conditions or assurances?
            When I have made metalurgical or drastic process changes in my repairables....I destructive test ......I sleep very well at night.
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            • Posted by strugatsky 10 years, 8 months ago
              The Columbia shuttle burned up because of the damage due to a disintegrated foam insulation. That insulation was made for many years. Then, a new "environmentally friendly" process was introduced...
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              • Posted by joearb 10 years, 8 months ago
                That's right. Previously, Freon w/ or w/o water was used as a "blowing agent" that made a very uniform cellular wall in the urethane foam. Then the EPA got involved and made the Freon illegal. Very uniform and strong cellular walls became obsolete and weak foam became the norm. Goodbye Columbia.
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  • Posted by $ puzzlelady 10 years, 8 months ago
    These don't look like "houses" to me, more like storage sheds, workshops, garages. They're on a slab, evidently. Is there water? Electricity? Air circulation? Sewer or septic? Heating? Insulation? Kitchen? What about floor covering? Will the concrete degrade and leave gray dust everywhere? (I'm thinking about my garage floor and basement floor.) Or is painting/sealing everything another stage? I'd want more information before moving into one of these "printed" houses.
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  • Posted by $ jlc 10 years, 8 months ago
    I think that the techniques and materials will be refined for stability and durability. What is noteworthy is that a Chinese company is premiering this, not a US company - we are now following, not leading. I like this tech because it counters the EPA desire to pack everyone into high density apartment buildings. This makes it easier for an individual to buy land and then have a building printed out to go on that land - less expensively than conventional building. 3D printing of single family homes and self-driving cars will let people live further away from cities and encourage an independent lifestyle.

    Jan
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  • Posted by Temlakos 10 years, 8 months ago
    Additive manufacturing applied to building construction? What will they think of next? Still: I wouldn't trust the structural integrity of such a laminated structure. But it might be just the thing to form a composite piece.
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    • Posted by $ jbrenner 10 years, 8 months ago
      They are stronger than most people think. As strong as your typically rigid plastic parts.
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      • Posted by Temlakos 10 years, 8 months ago
        Plastic might be strong, but I find it brittle, especially when exposed to cycles of heat and cold. How do these houses stand up to that?
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        • Posted by $ jbrenner 10 years, 8 months ago
          Yes, these plastics are brittle. I haven't looked at this particular article, but the standard polymers for 3D printing are acrylonitrile-butadiene-styrene (ABS) copolymer or poly(lactic acid). The latter is for applications requiring biocompatibility. I am guessing that they are using ABS. Think Legos. The maximum strain due to temperature differences would be about 0.5%. The strain at the yield stress is 1.5%. This should work with regard to temperature variation, if one neglects humidity effects, which would be significant.
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  • Posted by Non_mooching_artist 10 years, 8 months ago
    Um, I would not want to trust that to stand up under adverse conditions. I just picture what my husband has described to me if buildings in China. The emptiness of a vast number of them. Structural integrity...? Yes, it's a 3-D printer creating it.... Dubious...
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  • Posted by $ jbrenner 10 years, 8 months ago
    Chinese company uses 3D printing to build 10 houses in a day

    By Loz Blain

    April 23, 2014
    19 Comments
    3 Pictures
    Small home constructed from 3D-printed building blocks (Image: Winsun New Materials)

    Small home constructed from 3D-printed building blocks (Image: Winsun New Materials)
    Image Gallery (3 images)

    This small home may look plain, but it represents a significant achievement in rapid construction. A Chinese company has demonstrated the capabilities of its giant 3D printer by rapidly constructing 10 houses in less than 24 hours. Built from predominantly recycled materials, these homes cost less than US$5,000 and could be rolled out en masse to ease housing crises in developing countries.

    If you’ve been to a major city in China recently, you’ll have noticed a theme. Construction is absolutely rampant, with skyscraper after skyscraper going up as cities scramble to deal with a massive population that’s urbanizing at an unprecedented rate.

    Outside the major urban centers, there’s still a vast need for quick, cheap housing, and Suzhou-based construction materials firm Winsun has stepped forward with a very impressive demonstration of rapid construction by using 3D printing techniques to build 10 small houses in 24 hours using predominantly recycled materials.

    Rather than printing the homes in one go, Winsun’s 3D printer creates building blocks by layering up a cement/glass mix in structural patterns (watch the process here). The diagonally reinforced print pattern leaves plenty of air gaps to act as insulation. These blocks are printed in a central factory and rapidly assembled on site.
    Small home constructed from 3D-printed building blocks (Image: Winsun New Materials)

    The printer is 6.6 m (22 ft) tall, 10 m (33 ft) wide and 32 m (105 ft) long. Its print head looks somewhat like a baker’s piping gun as it lays out the building mix.

    Each small house takes very little labor to assemble, and costs as little as US$4,800. Winsun hopes to make them available for low income housing projects.

    Source: Winsun via Wall Street Journal
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  • Posted by $ nickursis 10 years, 8 months ago
    One of the things this type of stuff would be good for is after a tornado. Instead of doing the FEMA camp thing, just bring these guys in and let them rip. Of course, you need the raw material, but staging that across the country would be easy compared to other emergency shelters. Post earthquakes too. After seeing Biloxi Post Katrina, and Joplin Post F5, those people would have been thrilled if these guys showed up....
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