American engineers from the University of Virginia have found a way to improve the properties of concrete when 3D printing structures using a new plant-based material, cellulose nanofibrils (CNF). The study was published in the scientific journal magazine Cement and Concrete Composites (CCC).
The construction of concrete buildings using 3D printing has become a new trend in residential construction, providing high speed and accuracy of work.
This process uses a special setup that distributes the concrete mix according to a specific program, but the stability and durability of industrial printer “inks” are questionable due to difficult material requirements.
The mixture must flow well to ensure smoothness and harden quickly into a strong material with low thermal conductivity, the researchers say.
In a new experiment, the team was able to achieve the desired parameters of the concrete composition using a minimum of 0.3% NFC additive. The cellulose nanofibrils significantly increased flow stability, while microscopic analysis of solidified samples showed better material bonding and structural integrity.
During further testing in the lab, NFC components also withstood tension, bending, and compression.
Earlier scientists was created Bio-concrete has the ability to regenerate thanks to the microbes living in it.
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Source: Gazeta
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