3D printed durable concrete with glass instead of sand

Researchers at Singapore's Nanyang Technological University have studied whether concrete can be made and

use crushed glass containers instead of sand in it. After all, glass is made from silica, which is the main component of sand.

During the work, the scientists crushed glass waste intoin the form of five different sizes - large, medium, small, ultra-fine and moon dust. This is to replace sand and gravel, typical concrete aggregates. The crushed glass was then mixed with cement and water.

Once the concrete hardened, it turned out that itstrength is similar to traditional concrete with sand. In addition, the researchers noted that the poured concrete did not deform or collapse before it completely solidified. Plus it was liquid enough to pass through the printer's nozzle easily.

The authors also noticed that such a mixture required less water, since the glass does not absorb as much liquid.

As a result, the team stated that the redesignedglass can be used to replace up to 100% of the sand in concrete for 3D printing. Today, sand is actively used, and it does not have time to recover naturally. Therefore, according to the authors, the prospect of using recycled glass in construction is becoming more and more attractive.

Read more:

It has been hunted for centuries: what do we know about the planet Vulcan next to the Sun

Astronomers have found a planet near the Earth: it has a very strange orbit

Inexplicable duality found in elementary particle physics: what will it lead to