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Dissertation
Effects of cycling fatigue on chloride permeability of plain concrete
Doctor of Philosophy (Ph.D.), Drexel University
Jul 2000
DOI:
https://doi.org/10.17918/00000808
Abstract
The dissertation describes an empirical study of the effects of high amplitude (stress ratio) cyclic flexural loading and resulting localized cracking on chloride permeability of plain concrete. Third point flexural loading was applied to notched beams at one cycle/second, using a closed-loop control system governed by the measured deformation at the notch mouth (CMOD). The work addresses two types of fatigue: conventional constant load per cycle and a new technique with constant deformation per cycle. Both mechanical compliance (CMOD/Load), (the inverse of stiffness), and chloride permeability (K cl) using "Rapid" test (ASTM C1202-94) were monitored with progressive levels of deformation. The measured Kcl is a composite measurement through the 3.75" dia, 2" thick cores recovered from beam sections bracketing the distressed area. Comparisons are made between the distressed Kcl and that measured on cores of "intact" concrete obtained at the non-loaded sections of the same beams. A relationship between chloride permeability and compliance is indicated, showing that the fatigue-induced cracking affects both mechanical and diffusive behavior.
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Details
- Title
- Effects of cycling fatigue on chloride permeability of plain concrete
- Creators
- Wojciech Alex Gontar
- Contributors
- Joseph Paul Martin (Advisor)
- Awarding Institution
- Drexel University
- Degree Awarded
- Doctor of Philosophy (Ph.D.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xii, 147 pages
- Resource Type
- Dissertation
- Language
- English
- Academic Unit
- Civil (and Architectural) Engineering [Historical]; College of Engineering (1970-2026); Drexel University
- Other Identifier
- 991014970333804721