Development of 3D Printed Materials for Rapid Fabrication of Pedestrian and Bicycle Infrastructure to Increase Mobility

The research program will investigate the construction of fiber reinforced cementitious material (FRCM) components using extrusion-based 3D printing. Where conventionally formed concrete structures rely on the formwork for strength and stability during the hardening process, components constructed using 3D printing must rely on their green strength (i.e., strength during the time when the concrete has set but not appreciably hardened) and stiffness to resist instability, such as buckling and creep, during construction. As such, this proposal will investigate 3D printing from the point of view of materials and structural engineering, rather than construction. This study will result in engineered, 3D printed FRCMs meeting required quality control and engineering properties (from fresh to fully hardened) to simulate the response of the materials during construction (printing) and in their hardened state. The study is separated into the following research tasks to meet these specific objectives, as follows: (1) Design and fabricate material extrusion-based 3D printer for construction of FRCM components; (2) Develop a quality control protocol to investigate voids and fiber alignment of 3D printed FRCM components using x-ray tomography; (3) Investigate fresh-state properties of FRCMs fabricated using 3D printing; (4) Investigate hardened engineering properties of FRCMs fabricated using 3D printing; and (5) Disseminate research findings to the construction and structural engineering communities through partnership with Lafarge and the City of Seattle.

• Record URL:
  http://depts.washington.edu/pactrans/research/projects/development-of-3d-printed-materials-for-rapid-fabrication-of-pedestrian-and-bicycle-infrastructure-to-increase-mobility/

Language

• English

Project

• Status: Active
• Funding: $90000
• Contract Numbers:

  69A3551747110

• Sponsor Organizations:

  Pacific Northwest Transportation Consortium

  University of Washington
  More Hall Room 112
  Seattle, WA  United States  98195-2700

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Managing Organizations:

  University of Washington, Seattle

  433 Brooklyn Ave. NE
  Box 359472
  Seattle, WA  United States  98195-9472
• Project Managers:

  Lehman, Dawn

• Performing Organizations:

  University of Washington, Seattle

  433 Brooklyn Ave. NE
  Box 359472
  Seattle, WA  United States  98195-9472
• Principal Investigators:

  Lehman, Dawn

• Start Date: 20180816
• Expected Completion Date: 20200815
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers Program

Subject/Index Terms

• TRT Terms: Air voids; Bicycle facilities; Cement; Fabrication; Fiber reinforced materials; Infrastructure; Mobility; Pedestrians; Printers; Quality control
• Subject Areas: Bridges and other structures; Construction; Materials; Pedestrians and Bicyclists;

Filing Info

• Accession Number: 01701488
• Record Type: Research project
• Source Agency: Pacific Northwest Transportation Consortium
• Contract Numbers: 69A3551747110
• Files: UTC, RiP
• Created Date: Apr 5 2019 4:26PM