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.