Thursday 2:40 PM - 3:10 PM
*-denotes speaker
*Islam Mantawy, Atorod Azizinamini, Nerma Caluk – Florida International University
Incorporating UHPC for a prefabricated shell that acts as stay-in-place formwork for bridge columns eliminates the conventional formwork and reduces on-site construction time. In addition, the prefabricated shell acts as a durable protective layer for the normal concrete inside the column, while also providing additional confinement, which improves column’s structural performance. This presentation discusses the specimen development and experimental results of two columns which are utilizing UHPC shell tested under cyclic loading.
ABC 19-015: Resiliency Enhancement of Aging Frame Bridge Using Accelerated Bridge Construction as an Effective Climate Change Adaptation Approach *Husham Almansour, Amina Mohammed, Zoubir Lounis – National Research Council Canada
Global changes in temperature, precipitation and wind patterns threaten the integrity and functionality of reinforced concrete highway bridges. Hence, there is a need to enhance the resiliency of aging bridges. The objective of this paper is to investigate the effects of climate hazards on the safety and stability of aged slab-on-girders bridges. The investigation is aimed at evaluating the resiliency of critical elements and the overall bridge system when subjected to changing climate and after extreme climate events such as flooding. The study shows the impact of accelerated construction/ rehabilitation approaches on the enhancement of the bridge resiliency over minimum recovery time to ensure the bridge safety and serviceability.
ABC 19-018: Corrosion Durability of Reinforced Concrete Bridge Repaired with Application of UHPC Mahsa Farzad, *Kingsley Lau, Atorod Azizinamini – Florida International University
24% of the U.S. highway bridges are labeled structurally deficient or functionally obsolete which be replaced or upgraded to sustain the transportation needs of the growing public and private sectors of the US economy. This mandates the development of new techniques and materials for accelerated rehabilitation. Ultra-high performance concrete (UHPC) has been promoted as a durable construction material that can provide a barrier to corrosion. This paper investigates corrosion durability of UHPC repair and its possible use to mitigate macrocell corrosion. The objectives of the research presented here were to identify if concrete wetness will increase macrocell current and how much repair with UHPC may provide extended repair service life.
THURSDAY AFTERNOON
ABC 19-0012: Eliminating the need for Formwork by using UHPC Shell
2019 CONFERENCE PROGRAM 25