3D-Printing of Ultra-High-Performance Concrete for Robotic Bridge Construction

Automation and robotics are an integral part of many industries but its potential for field implementation has not been recognized by the construction industry. This is mainly attributed to conventional construction and design practices which undermine the benefits offered by these new technologies such as repetitions, precision, time savings and increased safety. There is a need for advanced materials and 3D-printing which are capable of constructing structural elements with performance emulative to conventionally cast elements. This study presents a detailed framework and performance metrics for materials and 3D-printing systems. In addition, a rheological study was carried out on ultra-high-performance concrete (UHPC) which showed sufficient extrudability and workability for 3D-printing applications. Then A 3D-printer system is developed for 3D-printing of continuous additive layers of UHPC with accelerated heat curing. The accelerated heat curing was used to expedite the printing of the UHPC layers and maximize the number of printed layers within the material open time. Effect of temperature on material properties was also evaluated to obtain the optimal temperature to satisfy compressive strength requirements. This on-going research effort is aimed at augmenting automated construction techniques and developing solutions to extend the application of accelerated bridge construction.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 18p

Subject/Index Terms

Filing Info

  • Accession Number: 01763643
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-03768
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:08AM