Stress induced dissolution and time-dependent deformation of portland cement paste
| Autor: | Masoud Moradian, Zachary Grasley, M. Tyler Ley |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Mechanical Engineering technology industry and agriculture 0211 other engineering and technologies Stiffness 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure law.invention Stress (mechanics) Portland cement Deformation mechanism Creep Mechanics of Materials law 021105 building & construction lcsh:TA401-492 medicine lcsh:Materials of engineering and construction. Mechanics of materials General Materials Science Deformation (engineering) medicine.symptom Composite material 0210 nano-technology Dissolution |
| Zdroj: | Materials & Design, Vol 157, Iss, Pp 314-325 (2018) |
| ISSN: | 0264-1275 |
| DOI: | 10.1016/j.matdes.2018.07.060 |
| Popis: | While the stress-induced dissolution of various minerals has gained attention as an important time-dependent deformation mechanism, this has only sparingly been investigated in portland cement systems. In this paper, X-ray Computed Tomography (XCT) is used to make direct observations of the microstructural evolution in cement paste samples under different levels of stress during their first 60 h of hydration. Stiffness and creep measurements are also made while imaging the changes in the microstructure. The results show that stress applied at ages between 24 h and 60 h caused an increase in stiffness, increase in early age creep, and a statistically higher amount of dissolution of individual particles near the point of load application. Keywords: X-ray Computed Tomography, Microstructure evolution, Cement Hydration, Creep, Dissolution |
| Databáze: | OpenAIRE |
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