You are here:
Estimated reading time: 1 min
Project Abstract:

This research improves upon the technique of reinforcing concrete with dispersed fibers by having the fibers axially shrink after curing to produce a dispersed multi-axial post-tensioned state. Such reinforcing has the potential to increase the crack resistance and durability of the concrete. Preliminary benchtop testing with natural chitosan polymer fibers have confirmed the viability of the technique, where certain configurations show significant strengthening with the shrinking fibers. The proposed research would expand the knowledge base by examining larger scale chitosan samples, exploring steel and nitinol shape memory fibers that produce a similar effect, studying the underlying mechanical principles and exploring direct applicability to transportation structures.


Principal Investigator:
Dr. Dryver Huston

Institution:
University of Vermont

Project Type:
Base-Funded Research

Start Date:
1/1/2019

Project Cost:
$347,274

Project Status:
In Progress

End Date:
05/30/2023

Agency ID:
69A3551847101

Sponsors:
University Transportation Centers Program, Department of Transportation
University of Vermont


Implementation of Research Outcomes:
Laboratory tests indicate that chitosan-based active shrinking fibers may have the potential to extend durability of concrete by altering microstructure, for applications, such as freeze-thaw durability. soluble polymer slugs can pretension the concrete and provide some performance enhancement.

Steel Rings with water soluble polymer slugs in concrete

Impacts and Benefits of Implementation:
Research is in the initial phase and is ongoing.

Related Links:
Coming Soon


Downloadable Documents

Printable Project Information Sheet

April 2019 Semi-Annual Progress Report

September 2019 Semi-Annual Progress Report

December 2019 Quarterly Progress Report

March 2020 Quarterly Progress Report

June 2020 Quarterly Progress Report

September 2020 Quarterly Progress Report

December 2020 Quarterly Progress Report

March 2021 Quarterly Progress Report

June 2021 Quarterly Progress Report

September 2021 Quarterly Progress Report

December 2021 Quarterly Progress Report

Tags:
Views: 128
Categories: