Early Age Stresses and Creep-Shrinkage Interaction of Restrained Concrete
Altoubat, Salah Ahmed
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https://hdl.handle.net/2142/83516
Description
Title
Early Age Stresses and Creep-Shrinkage Interaction of Restrained Concrete
Author(s)
Altoubat, Salah Ahmed
Issue Date
2000
Doctoral Committee Chair(s)
Lange, David A.
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Materials Science
Language
eng
Abstract
The analysis revealed stress-induced shrinkage as a major mechanism of drying creep for plain and fiber reinforced concrete (FRC). Microcracking forms a significant portion of drying creep of plain concrete, but it is less significant in FRC. Therefore, creep of FRC is dominated by real mechanisms, whereas apparent mechanisms induced by microcracking is significant in plain concrete. The real creep mechanisms are beneficial because they provide tensile stress relaxation, but the apparent mechanisms are associated with microstructural damage and are detrimental. Therefore, FRC enhances stress relaxation and delays the time of shrinkage cracking.
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