Title:
Application of UHPC 2.0TM for a Non-Conventional Reinforcing and Strengthening of a Reinforced Concrete Beam for Bridges and Structures
Author(s):
Peter W. Weber and Su Wang
Publication:
Symposium Paper
Volume:
346
Issue:
Appears on pages(s):
1-10
Keywords:
direct tension; durability; mechanical properties; nano-engineered binder; UHPFRC
DOI:
10.14359/51730489
Date:
1/1/2021
Abstract:
Conventional reinforcing and strengthening methods and material for bridges and structures has several
limitations including include the increased weight of structure, the limited service life of the repair, short periods
between repairs, uncertain strength of the reinforcement, extended time of repair and typically a heavy carbon
footprint based on the materials used. Application of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC)
solutions have shown the potential to replace traditional methods over the coming decade because the superior
mechanical and durability properties reduce the required thickness of a repairing layer and extend the service life.
Based on the overall cost of a given rehabilitation project, UHPFRC based solutions can already compete today but
require certain specialized equipment and trained workforce creating real or perceived barriers. In this paper, a new
type of nano-engineered UHPFRC based on carbon-nanofibers (CNFs) was introduced, named UHPC 2.0TM. The test
results show that UHPC 2.0TM possesses ultra-high mechanical properties, improved direct tension performance and
durability. In addition, an analytical procedure is provided for case studies to show the performance and economic
benefits of usage of UHPC 2.0TM compared to traditional UHPFRC.