3D printing recycled concrete incorporating plant fibres: A comprehensive review

This study explores the integration of 3D concrete printing (3DCP) with recycled aggregate concrete (RAC) and plant fibres, highlighting its role in advancing sustainable construction practices. The findings demonstrate that plant fibres enhance the mechanical and thermal properties and environmental impact of normal concrete and RAC, including the improvements in compressive, flexural, fracture characteristics. Building on these substantial enhancements, the study further investigates the potential of combining 3DCP with plant fibre-reinforced RAC. Researches indicate that fibres can mitigate the negative performance impacts brought about by the use of RAC in 3D printing, particularly in terms of tensile and flexural resistance. Based on these findings, the introduction of plant fibres is expected to optimise the mechanical properties while also having a notable impact on carbon emissions. This synergy between 3DCP and plant fibre-reinforced RAC not only aligns with sustainable construction goals but also marks a significant shift towards environmentally responsible practices and innovations in the construction industry.