Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Non-proprietary Ultra High-Performance Concrete for Longitudinal Field-Cast Connection Between Precast Bridge Decks
Cast-in-place bridge construction in rural areas can be challenging due to logistical challenges. In the United States, the use of pretensioned concrete girders called Deck Bulb-Tees (DBTs) allows the Departments of Transportation to partially mitigate some of the challenges. DBTs offer the benefit of accelerated construction, better durability and longer spans. The process of building the bridge deck using DBTs involves casting each bridge girder and portion of the deck in a precast yard before transporting them to the bridge site. Only the adjacent deck elements require a connection that can be poured on-site. The connection between the precast girders can be achieved in multiple ways, including the use of grouted joints or cast-in-place concrete. Past research has shown that Ultra High-Performance Concrete (UHPC) can be used to provide good connection between the DBTs. There are several types of proprietary UHPC products available in North America. However, a disadvantage of proprietary UHPC products has been the higher cost of the material. This research project focuses on development of a non-proprietary UHPC mix using locally available materials. The mechanical properties measured in this project are the compressive and tensile strength, modulus of elasticity, Poisson’s ratio, shrinkage, bond strength with precast concrete, and rebar bond to the UHPC. In addition, large-scale panel bending tests are conducted to evaluate the overall strength and failure mechanism of the non-proprietary UHPC in a closure pour between two precast components. Results from the non-proprietary UHPC mix are compared against those from a proprietary UHPC product.
A Non-proprietary Ultra High-Performance Concrete for Longitudinal Field-Cast Connection Between Precast Bridge Decks
Cast-in-place bridge construction in rural areas can be challenging due to logistical challenges. In the United States, the use of pretensioned concrete girders called Deck Bulb-Tees (DBTs) allows the Departments of Transportation to partially mitigate some of the challenges. DBTs offer the benefit of accelerated construction, better durability and longer spans. The process of building the bridge deck using DBTs involves casting each bridge girder and portion of the deck in a precast yard before transporting them to the bridge site. Only the adjacent deck elements require a connection that can be poured on-site. The connection between the precast girders can be achieved in multiple ways, including the use of grouted joints or cast-in-place concrete. Past research has shown that Ultra High-Performance Concrete (UHPC) can be used to provide good connection between the DBTs. There are several types of proprietary UHPC products available in North America. However, a disadvantage of proprietary UHPC products has been the higher cost of the material. This research project focuses on development of a non-proprietary UHPC mix using locally available materials. The mechanical properties measured in this project are the compressive and tensile strength, modulus of elasticity, Poisson’s ratio, shrinkage, bond strength with precast concrete, and rebar bond to the UHPC. In addition, large-scale panel bending tests are conducted to evaluate the overall strength and failure mechanism of the non-proprietary UHPC in a closure pour between two precast components. Results from the non-proprietary UHPC mix are compared against those from a proprietary UHPC product.
A Non-proprietary Ultra High-Performance Concrete for Longitudinal Field-Cast Connection Between Precast Bridge Decks
Lecture Notes in Civil Engineering
Ilki, Alper (Herausgeber:in) / Çavunt, Derya (Herausgeber:in) / Çavunt, Yavuz Selim (Herausgeber:in) / Shokrgozar, Ali (Autor:in) / Ebrahimpour, Arya (Autor:in) / Mashal, Mustafa (Autor:in)
International Symposium of the International Federation for Structural Concrete ; 2023 ; Istanbul, Türkiye
01.06.2023
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
| British Library Online Contents | 2016