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.
Related References:
1. D. Bjegović, J. Radić, V. Čandrlić, M. Skazlić, M. Zamolo, S. Mrakovčić, I. Gukov, Ultra High Performance Fibre-Reinforced Concretes-Interim Recommendations, Hrvatska normizacija i srodne djelatnosti–; tehničko usklađivanje na putu prema Europskoj uniji, 2004.
2. Y. Uchida, T. Takeyama, T. Dei, Ultra high strength fiber reinforced concrete using aramid fiber, Proceedings of FraMCoS-7, Jeju, South Korea (2010) 1492-1496.
3. D.-Y. Yoo, N. Banthia, Mechanical properties of ultra-high-performance fiber-reinforced concrete: A review, Cement and Concrete Composites 73 (2016) 267-280.
4. K. Wille, D.J. Kim, A.E. Naaman, Strain-hardening UHP-FRC with low fiber contents, Materials and Structures 44(3) (2011) 583-598.
5. H. Brouwers, H. Radix, Self-compacting concrete: theoretical and experimental study, Cement and Concrete Research 35(11) (2005) 2116-2136.
6. Z. Chen, J.L.G. Lim, E.-H. Yang, Ultra high performance cement-based composites incorporating low dosage of plasma synthesized carbon nanotubes, Materials & Design 108 (2016) 479-487.
7. BSI, Testing hardened concrete - Part 3: Compressive strength of test specimens, BS EN 12390-3, British Standards Institution, London, 2011.
8. ASTM, Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars, ASTM C348-14, ASTM International, Farmington Hills, MI, USA, 2014.
9. E. BS, Testing hardened concrete - Part 13: Determination of secant modulus of elasticity in compression, BS EN 12390-13, European Committee For Standardization, London, 2013.
10. S. Merkblatt, 2052: 2016: Ultra-Hochleistungs-Faserbeton (UHFB), Baustoffe, Bemessung und Ausführung, Schweizer Ingenieur‐und Architektenverein SIA, Zürich (2016).
11. ASTM, Standard Practice for Fabricating and Testing Specimens of Ultra-High Performance Concrete, ASTM C1856-17, ASTM International, Farmington Hills, MI, USA, 2017.
12. ASTM, Standard test method for electrical indication of concrete's ability to resist chloride ion penetration, ASTM C1202-19, ASTM International, Farmington Hills, MI, USA, 2019.
13. ASTM, Standard test method for density, absorption, and voids in hardened concrete, ASTM C642-13, ASTM International, Farmington Hills, MI, USA, 2013.
14. A. Peyvandi, P. Soroushian, J. Lu, A.M. Balachandra, Enhancement of ultrahigh performance concrete material properties with carbon nanofiber, Advances in Civil Engineering 2014 (2014).
15. F. Sanchez, K. Sobolev, Nanotechnology in concrete–a review, Construction and building materials 24(11) (2010) 2060-2071.
16. M. Jones, A. McCarthy, Preliminary views on the potential of foamed concrete as a structural material, Magazine of concrete research 57(1) (2005a) 21-31.
17. M.S. Konsta-Gdoutos, Z.S. Metaxa, S.P. Shah, Multi-scale mechanical and fracture characteristics and early-age strain capacity of high performance carbon nanotube/cement nanocomposites, Cement and Concrete Composites 32(2) (2010) 110-115.
18. C.S. Association, Concrete materials and methods of concrete construction/Test methods and standard practices for concrete, CSA A23.1:19/CSA A23.2:19, GSA Group, 178 Rexdale Boulevard, Toronto, Ontario, Canada M9W 1R3, 2019.
19. S. Mindess, F. Young, D. Darwin, Concrete 2nd Editio, Upper Saddle River, NJ: Pearson Education, Inc2003.
20. E. Brühwiler, “STRUCTURAL UHPFRC” TO ENHANCE BRIDGES, Proceedings of the 2nd International Conference on UHPC Materials and Structures UHPC 2018-China, RILEM Publications SARL, 2018, pp. 140-158.
21. M. Bastien-Masse, E. Brühwiler, Contribution of R-UHPFRC strengthening layers to the shear resistance of RC elements, Structural Engineering International 26(4) (2016) 365-374.