Hempcrete – CO2 Neutral Wall Solutions for 3D Printing
5th International Conference “Innovative Materials, Structures and Technologies” (IMST 2022) 2022
Māris Šinka, Ella Spuriņa, Aleksandrs Korjakins, Diāna Bajāre

Hempcrete is a bio-based self-bearing envelope and thermal insulation building material that is becoming more popular nowadays and has a low environmental impact, especially CO2 emissions. This study looks for solutions for hempcrete printing using a custom-built gantry type 3D printer typically used for concrete 3D printing. Preliminary research shows that hempcrete can be printed at a relatively low density of 660 kg / m3 and achieve adequate buildability and compressive strength for printing individual wall elements. At this density, hempcrete has a thermal conductivity of 0.133 w / (m · K), unable to provide adequate thermal resistance at average wall thickness, so high-density hempcrete should be printed as an outer wall shell (similar to Contour Crafting) and the middle filled with lower density thermal insulation hempcrete. By calculating the CO2 emissions of such printed 400–620 mm thick walls, it was found that they absorb from 1.21 to 16.7 kg of CO2 per m2, thus, such material could reduce the negative environmental impact of the construction industry while improving its productivity through 3D printing.


Atslēgas vārdi
3D Printing; Additive Manufacturing;
Hipersaite
https://imst.rtu.lv/wp-content/uploads/sites/59/2022/11/IMST-abstracts_2022-web-1.pdf

Šinka, M., Spuriņa, E., Korjakins, A., Bajāre, D. Hempcrete – CO2 Neutral Wall Solutions for 3D Printing. No: 5th International Conference “Innovative Materials, Structures and Technologies” (IMST 2022), Latvija, Riga, 28.-30. septembris, 2022. Riga: 2022, 76.-76.lpp.

Publikācijas valoda
English (en)
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