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.

Language

  • English

Project

  • Status: Active
  • Funding: $180856
  • 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: 20220930
  • Actual Completion Date: 20220930
  • USDOT Program: University Transportation Centers
  • Subprogram: Transportation Infrastructure Durability & Life Etension

Subject/Index Terms

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 3 2021 11:42AM