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Old 10-20-2017, 12:00 AM   #1
xoxoxoBruce
The future is unwritten
 
Join Date: Oct 2002
Posts: 71,105
Oct 20th, 2017: Fake News

Trump is right, the mainstream media lies.
The Guardian’s headline;
World's first 3D-printed bridge opens to cyclists in Netherlands
Crossing printed from 800 layers of concrete… could take weight of 40 trucks, designers say.

It’s not a total lie, it’s inaccurate and misleading the readers which has been driving scientists nuts for years.



Quote:
Dutch officials have toasted the opening of what is being called the world’s first 3D-printed concrete bridge, which is primarily meant to be used by cyclists.
----
“The bridge is not very big, but it was rolled out by a printer, which makes it unique,” Theo Salet, from the Eindhoven University of Technology, told Dutch broadcaster NOS. Work on printing the bridge, which has some 800 layers, took about three months after starting in June and it is made of reinforced, pre-stressed concrete, according to the university.


I don’t know how this method pre-stresses the concrete?

Quote:
“One of the advantages of printing a bridge is that much less concrete is needed than in the conventional technique in which a mould is filled,” it said on its website. “A printer deposits the concrete only where it is needed.” The eight-metre (26-ft) bridge spans a water-filled ditch to connect two roads, and in conjunction with the BAM Infra construction company was tested for safety to bear loads of up to two tonnes.
Two tonnes = 4409 lbs = The Guardian's 40 trucks???

This is the first 3-D printed concrete bridge in Europe.


Quote:
The first 3D printed pedestrian bridge in the world opened to the public on December 14 in Madrid. Led by the Institute of Advanced Architecture of Catalonia (IAAC) in a process that took a year and a half from its conception, the structure crosses a stream in Castilla-La Mancha Park in Alcobendas, Madrid.
Although similar initiatives have already been announced in the Netherlands, this is the first to have finished construction. The structure is printed in micro-reinforced concrete, and measures 12 meters in length and 1.75 meters wide.
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