Implementation of High/ Ultra high-Performance Concrete in Design & Production of Conventional Bridge Structures
Typ
Examensarbete för masterexamen
Program
Structural engineering and building technology (MPSEB), MSc
Publicerad
2022
Författare
Alabrash, Abdulrazak
Alyoussef, Khaled
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Concrete has been used in various applications in civil engineering projects for a long
time, and it has also developed over time regarding its strength, durability and
performance. The development of concrete technology could achieve new types of
concrete, such as high-performance and ultra high-performance concrete
(HPC)/(UHPC). Since the 1980s, HPC/UHPC has been widely used in bridge
construction worldwide because of its superior properties compared to normal
strength reinforced concrete in terms of strength and durability. HPC/UHPC could
provide bridges with substantial savings such as longer service life, more slender,
higher cross-section capacity, and better durability. However, HPC/UHPC are
delayed in Sweden, where only two bridges are built with HPC while no application
of UHPC can be found. The lack of standards and experience are among the reasons
behind this delayed.
This thesis aims to give a general overview of HPC/UHPC to increase the knowledge
about HPC/UHPC from material and design perspectives in Sweden. HPC/UHPC will
be used to design a concrete bridge to compare the differences in design between
HPC/UHPC and an exciting bridge made from conventional concrete C35/45. The
calculation will consider the gaining of moment capacity that can be provided to the
cross-section using HPC/UHPC respectively while keeping the same reinforcement.
Moreover, the cross-section will be optimised by reducing the thickness and
comparing the amount of reinforcement, crack width and deflection. Two case
studies are carried out to make a comparison. Case 1 considers the design with HPC
(C 90/105) and compares the results with the existing bridge, while case 2 considers
the design of UHPC.
Beskrivning
Ämne/nyckelord
High-performance concrete (HPC), ultra-high-performance concrete (UHPC), ultra high-performance fibre reinforced concrete (UHPFRC), normal strength concrete (NC), bridge design, sustainable concrete bridge, cement, moment capacity