A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fiber-Reinforced Concrete in Closure Pours over Piers
Cracks in concrete, high permeability, or leaking bridge joints facilitate the penetration of chloride solutions, resulting in extensive corrosion damage. Joints can be eliminated by constructing continuous decks or closure pours, and infiltration through concrete can be minimized by using low-permeability concrete and fiber-reinforced concrete (FRC) that controls cracks. This study investigated low-permeability FRCs with polyvinyl alcohol (PVA), polypropylene (PP), or steel (S) fibers to control cracking in closure pours. Large volumes of suitable fibers used in FRC enable high residual strengths and deflection hardening behavior. Generally, in these concretes, multiple tight cracks (less than 0.004 in. [0.1 mm] wide) occur, which resist the ingress of harmful solutions. In two bridges on I-64 near Covington, VA, closure pours with FRCs were placed. The initial results indicate, in general, no or tight cracking in FRCs with PVA, PP, or S fibers. Deflection hardening did not occur in all mixtures; however, the tight cracks observed were attributed to the addition of fibers and the presence of primary reinforcement.
Fiber-Reinforced Concrete in Closure Pours over Piers
Cracks in concrete, high permeability, or leaking bridge joints facilitate the penetration of chloride solutions, resulting in extensive corrosion damage. Joints can be eliminated by constructing continuous decks or closure pours, and infiltration through concrete can be minimized by using low-permeability concrete and fiber-reinforced concrete (FRC) that controls cracks. This study investigated low-permeability FRCs with polyvinyl alcohol (PVA), polypropylene (PP), or steel (S) fibers to control cracking in closure pours. Large volumes of suitable fibers used in FRC enable high residual strengths and deflection hardening behavior. Generally, in these concretes, multiple tight cracks (less than 0.004 in. [0.1 mm] wide) occur, which resist the ingress of harmful solutions. In two bridges on I-64 near Covington, VA, closure pours with FRCs were placed. The initial results indicate, in general, no or tight cracking in FRCs with PVA, PP, or S fibers. Deflection hardening did not occur in all mixtures; however, the tight cracks observed were attributed to the addition of fibers and the presence of primary reinforcement.
Fiber-Reinforced Concrete in Closure Pours over Piers
H Celik Ozyildirim (author) / Evelina Khakimova / Harikrishnan Nair / Gail M Moruza
ACI materials journal ; 114
2017
Article (Journal)
English
Taylor & Francis Verlag | 1974
Corrosion Activity in Precast Concrete Elements and Cementitious Closure Pours
| Online Contents | 2015
Corrosion Activity in Precast Concrete Elements and Cementitious Closure Pours
| British Library Online Contents | 2015