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Supplementary Information: Insights into the Physical and Chemical Properties of a Cement-Polymer Composite Developed for Geothermal Wellbore Applications Kenton A. Rod 1 , Manh-Thuong Nguyen 2 , Mohamed Elbakhshwan 3+ , Simerjeet Gill 3+ , Barbara Kutchko 4 , Tamas Varga 5 , Adriana M. Mckinney 5 , Timothy J. Roosendaal 1 , M. Ian Childers 1 , Chonghang Zhao 6+ , Yu-chen Karen Chen-Wiegart 6,7+ , Juergen Thieme 7+ , Phillip K. Koech 1 , Wooyong Um 8 , Jaehun Chun 1 , Roger Rousseau 2 , Vassiliki- Alexandra Glezakou 2 , Carlos A. Fernandez 1 * 1Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland WA 2Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland WA 3Nuclear Science and Technology Department, Brookhaven National Laboratory, Brookhaven, NY 4National Environmental Technology Laboratory, Pittsburg PA 5Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 6Department of Materials Science and Chemical Engineering, Stony Brook University
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Supplementary Information:
Insights into the Physical and Chemical Properties of a
Cement-Polymer Composite Developed for Geothermal
Wellbore ApplicationsKenton A. Rod1, Manh-Thuong Nguyen2, Mohamed Elbakhshwan3+, Simerjeet Gill3+, Barbara Kutchko4, Tamas Varga5, Adriana M. Mckinney5, Timothy J. Roosendaal1, M. Ian Childers1, Chonghang Zhao6+, Yu-chen Karen Chen-Wiegart6,7+, Juergen Thieme7+, Phillip K. Koech1, Wooyong Um8, Jaehun Chun1, Roger Rousseau2, Vassiliki-Alexandra Glezakou2, Carlos A. Fernandez1*
1Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland WA
2Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory,
Richland WA
3Nuclear Science and Technology Department, Brookhaven National Laboratory, Brookhaven,
NY
4National Environmental Technology Laboratory, Pittsburg PA
5Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory,
Richland, WA
6Department of Materials Science and Chemical Engineering, Stony Brook University
7National Synchrotron Light Source II, Brookhaven National Laboratory
8Pohang University of Science and Technology (POSTECH), Pohang, South Korea
+these authors contributed equally to this work
TABLES
Table S1. Composition of cement and cement polymer composites used in this study
Component Control 10% Polymer-cement
25% Polymer-cement
Cement (g) 157.5 157.5 105
Silica flour (g) 67.5 67.5 45
Water (g) 85.5 112.5 90
Water:cement 0.54 0.71 0.86
Total polymer (g) 0 22.5 37.5
EPS 25 (g) 0 8.40 14
EPS 25 (mmol) 0 6.60 11
PEO (g) 0 8.40 14
PEO (mmol) 0 16.8 28
4SH (g) 0 5.70 9.5
4SH (mmol) 0 11.7 19
FIGURES
Figure S1: Bulk unit cell (solid rectangle) of the C-S-H and polymer complex used in DFT
calculations. Color code for the polymer layer: H white, C silver, O red, S yellow.
Figure S2. XCT density detection of all voids including polymer filled (left, green void space),
and air only voids (right, red void space) in 10 wt% polymer-cement composite.
VIDEOS
Video 1. 3D video image of cement from x-ray computed tomography. Transparent grey is cement; white is unhydrated mineral grain; green is void space
Video 2. 3D video image of cement with 10% polymer from x-ray computed tomography. Transparent grey is cement; white is unhydrated mineral grain; green is polymer filled void
Video 3. 3D video image of cement with 25% polymer from x-ray computed tomography. Transparent grey is cement; white is unhydrated mineral grain; green is polymer filled void
Video 4. Video of Young’s modulus test on control cement, sample 1. Samples were painted white and speckle painted with black dots. Color is strain map of surface generated by computer simulation of changing topology of dots. Red is low strain; violet is high strain.
Video 5. Video of Young’s modulus test on control cement, sample 2. Samples were painted white and speckle painted with black dots. Color is strain map of surface generated by computer simulation of changing topology of dots. Red is low strain; violet is high strain.
Video 6. Video of Young’s modulus test on control cement, sample 3. Samples were painted white and speckle painted with black dots. Color is strain map of surface generated by computer simulation of changing topology of dots. Red is low strain; violet is high strain.
Video 7. Video of Young’s modulus test on cement with 10% polymer, sample 4. Samples were painted white and speckle painted with black dots. Color is strain map of surface generated by computer simulation of changing topology of dots. Red is low strain; violet is high strain.
Video 8. Video of Young’s modulus test on cement with 10% polymer, sample 5. Samples were painted white and speckle painted with black dots. Color is strain map of surface generated by computer simulation of changing topology of dots. Red is low strain; violet is high strain.
Video 9. Video of Young’s modulus test on cement with 10% polymer, sample 6. Samples were painted white and speckle painted with black dots. Color is strain map of surface generated by computer simulation of changing topology of dots. Red is low strain; violet is high strain.
