Evaluation of Fresh and Hardened Properties of 3D-Printed Engineered Cementitious Composites (ECC) Designed for Sustainable and Resilient Infrastructure Systems

Additive manufacturing (AM) is revolutionizing many manufacturing fields worldwide. AM enables the fabrication of 3D-objects by extruding filaments following a designed pattern. There are some challenges in applying AM to 3D-printing of concrete structural elements. These limitations are mainly associated with the fresh properties of concrete mixtures, the possibility of cold joint formation between different layers, and the incorporation of reinforcing components (i.e., steel bars). Because of these limitations, conventional concrete mixtures cannot be used for the 3D-printing application. One of the crucial challenges against the broader adoption of concrete 3D-printing is reinforcing 3D-printed components to reach acceptable structural performance under different loading configurations. Therefore, we should design a concrete mixture that can be utilized as a rebar-free material but address both strength and ductility requirements. Recently, the development of Engineered Cementitious Composites (ECC) has neared the possibility to obtain both criteria (i.e., strength and ductility) in the concrete structures without embedding steel reinforcement. Hence, ECC can be used as an intrinsically reinforced cementitious material for the 3D-printing of concrete components. This project proposes ECC mixtures' design by mostly using the available local materials and admixtures in Region 6 and then studies the fresh and hardened properties of these 3D-printed mixtures as a function of mixture proportions. The ECC mixtures' properties, which will be evaluated in this proposal, include the extrudability and buildability as the fresh properties and compressive, flexural, and tensile strength of 3D-printed ECC elements as hardened properties.

• Record URL:
  https://transet.lsu.edu/wp-content/uploads/sites/16/2021/08/21CUNM05.pdf
• Supplemental Notes:
  • 21CUNM05

Language

• English

Project

• Status: Active
• Funding: $100000
• Contract Numbers:

  69A3551747106

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

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

  Transportation Consortium of South-Central States (Tran-SET)

  Louisiana State University
  Baton Rouge, LA  United States  70803
• Project Managers:

  Mousa, Momen

• Performing Organizations:

  University of New Mexico, Albuquerque

  Department of Civil Engineering
  Albuquerque, NM  United States  87131-0001
• Principal Investigators:

  Hojati, Maryam

• Start Date: 20210801
• Expected Completion Date: 20230201
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers Program

Subject/Index Terms

• TRT Terms: Admixtures; Cement; Concrete construction; Engineered materials; Three dimensional printing
• Subject Areas: Bridges and other structures; Construction; Materials; Transportation (General);

Filing Info

• Accession Number: 01833029
• Record Type: Research project
• Source Agency: Transportation Consortium of South-Central States (Tran-SET)
• Contract Numbers: 69A3551747106
• Files: UTC, RIP
• Created Date: Jan 20 2022 1:51PM