Development of Microcapsule-based Self-healing, High-strength Engineered Cementitious Composites (SHHS-ECC)

The durability of High-strength engineered cementitious composites (HS-ECC) is severely challenged once cracks are formed in a HS-ECC structural member, especially for those exposed to harsh environments (e.g., laden with chloride or sulfates). In this context, the goal of this project is to design a self-healing HS-ECC by virtue of microcapsules encapsulating healing agent. The multi-scale self-healing ability of the HS-ECC will be achieved through the combined use of microcapsules and continuous hydration of cementitious materials, so as to maintain the superior durability of HS-ECC. To this end, this exploratory laboratory investigation aims to: (1) identify the mix designs of HS-ECC incorporating microcapsules, based on the micromechanics theory (2) evaluate the self-healing effectiveness of HS-ECC, in terms of restoration level of tensile and transport properties (3) study the effect of crack width and pre-cracking age on the self-healing efficiency of HS-ECC.

• Record URL:
  https://tridurle.wsu.edu/shhs-ecc-2/

Language

• English

Project

• Status: Active
• Funding: $180,856
• Contract Numbers:

  69A3551947137

• Sponsor Organizations:

  Transportation Infrastructure Durability & Life Extension

  Washington State University
  Civil & Environmental Engineering
  Pullman, Washington  United States  99164
• Managing Organizations:

  Transportation Infrastructure Durability & Life Extension

  Washington State University
  Civil & Environmental Engineering
  Pullman, Washington  United States  99164
• Project Managers:

  Kline, Robin

• Performing Organizations:

  Washington State University, Pullman

  Civil & Environmental Engineering Department
  PO Box 642910
  Pullman, WA  United States  99164-2910
• Principal Investigators:

  Shi, Xianming

• Start Date: 20210501
• Expected Completion Date: 20230630
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers
• Subprogram: Transportation Infrastructure Durability and Life Extension

Subject/Index Terms

• TRT Terms: Cement; Composite materials; Durability; High strength materials; Hydration; Mix design; Pavement cracking; Sustainable development; Tensile properties
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01773716
• Record Type: Research project
• Source Agency: National Center for Transportation Infrastructure Durability and Life-Extension
• Contract Numbers: 69A3551947137
• Files: UTC, RIP
• Created Date: Jun 5 2021 4:44PM