Virginia Tech
The Effects of Early-Age Stress on the Elastic and Viscoelastic Behavior of Cement Paste
Abstract
dc:description.abstractThe viscoelastic behavior of concrete, nearly completely attributable to changes in properties in the cement paste, is an ongoing area of research with the objective of avoiding unpredictable response and potentially failure of concrete structures. This research explores the elastic and viscoelastic response in cement paste beams using relaxation testing, with and without strain reversals in the load history. It was seen that strain reversal imparts significant changes in mechanical response, retarding load relaxation. Companion beams were tested for chemical composition at varying depths in the beam section and the results were compared to those of control specimens not subject to stress. Results indicate significant variations in composition implying that stress accelerates the hydration process. The reasons behind the acceleration are discussed and incorporated into a preliminary solidification-dissolution model for beam relaxation. The model, though in need of improvement through further research, shows promise in potentially predicting relaxation in cement paste and by extension, in concrete structures.
Degree
thesis:*- Name thesis:degree_name
- Ph. D.
- Level thesis:degree_level
- doctoral
- Discipline thesis:degree_discipline
- Civil Engineering
- Department dc:contributor.department
- Civil and Environmental Engineering
- Grantor dc:publisher
- Virginia Tech
- Year dc:date.issued
- 2015
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Galitz, Christopher Lee
- Chairs dc:contributor.committeechair
-
- Roberts-Wollmann, Carin L.
- Grasley, Zachary
- Committee members dc:contributor.committeemember
-
- Foster, Earl Johan
- Charney, Finley A.
- Mokarem, David W.
Subjects
dc:subject × 10Rights
dc:rights- Statement dc:rights
-
- In Copyright
- Licence dc:rights.uri
Identifiers
dc:identifier.*- Dc Identifier Other
- vt_gsexam:6527
- OAI identifier oai:identifier
- oai:vtechworks.lib.vt.edu:10919/56988