Back to Search
Start Over
Structural and chemical changes from CO2 exposure to self-healing polymer cement composites for geothermal wellbores
- Source :
- Geothermics. 89:101932
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Wellbore cement is subjected to a number of mechanical, thermal and chemical stress regimes over its lifetime. Therefore, next-generation wellbore cement formulations need to be evaluated in conditions relevant to these environments. In this work, we investigate the mechanism of the alteration of a novel self-healing polymer-cement composite after exposure to a CO2-rich environment by using synchrotron-based X-ray Fluorescence (XRF), X-ray absorption near edge structure (XANES), and scanning electron microscopy coupled with energy dispersive spectroscopy. Results showed that a chemical alteration of the polymer-cement follows the rim carbonation mechanism, similar to conventional cement, although carbonation takes place to a lesser extent in polymer-cements despite the higher porosity. Along with detailed mechanistic insights on carbonation in polymer-cement composite, the performance of these in CO2-rich environment is further studied using standard compressive strength analysis.
- Subjects :
- Cement
Materials science
Renewable Energy, Sustainability and the Environment
Scanning electron microscope
Carbonation
Composite number
0211 other engineering and technologies
Energy-dispersive X-ray spectroscopy
Geology
02 engineering and technology
010502 geochemistry & geophysics
Geotechnical Engineering and Engineering Geology
01 natural sciences
XANES
Compressive strength
021108 energy
Composite material
Porosity
0105 earth and related environmental sciences
Subjects
Details
- ISSN :
- 03756505
- Volume :
- 89
- Database :
- OpenAIRE
- Journal :
- Geothermics
- Accession number :
- edsair.doi...........d40ecd0123027ed5751fbe7b4e041708