Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems
Energy losses can be significantly reduced if thermally insulating cement is used for energy storage and recovery. The thermal conductivity (TC) of the currently used cement is between 1 and 1.2 W/mK. In this study we assessed the ability of polystyrene (PS)–polybutadiene (PB)–polyacrylic acid (PAA)...
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MDPI AG
2023-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/17/5792 |
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| author | Toshifumi Sugama Tatiana Pyatina |
| author_facet | Toshifumi Sugama Tatiana Pyatina |
| author_sort | Toshifumi Sugama |
| collection | DOAJ |
| description | Energy losses can be significantly reduced if thermally insulating cement is used for energy storage and recovery. The thermal conductivity (TC) of the currently used cement is between 1 and 1.2 W/mK. In this study we assessed the ability of polystyrene (PS)–polybutadiene (PB)–polyacrylic acid (PAA) terpolymer (cross-linked styrene–butadiene rubber, XSBR) latex to improve thermal insulating properties and thermal shock (TS) resistance of class G ordinary Portland cement (OPC) and fly ash cenosphere (FCSs) composites in the temperature range of 100–175 °C. The composites autoclaved at 100 °C were subjected to three cycles, one cycle: 175 °C heat → 25 °C water quenching). In hydrothermal and thermal (TS) environments at elevated temperatures in cement slurries the XSBR latex formed acrylic calcium complexes through acid–base reactions, and the number of such complexes increased at higher temperatures due to the XSBR degradation with formation of additional acrylic groups. As a result, these complexes offered the following five advanced properties to the OPC-based composites: (1) enhanced hydrophobicity; (2) decreased water-fillable porosity; (3) reduced TC for water-saturated composites; (4) minimized loss of compressive strength, Young’s modulus, and compressive fracture toughness after TS; and (5) abated pozzolanic activity of FCSs, which allowed FCSs to persist as thermal insulators under strongly alkaline conditions of cement slurries. Additionally, XSBR-modified slurries possessed improved workability and decreased slurry density due to the air-entraining effect of latex, which resulted in further improvement of thermal insulation performance of the modified composites. |
| first_indexed | 2024-03-10T23:19:16Z |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:19:16Z |
| publishDate | 2023-08-01 |
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| spelling | doaj.art-273f590dce844dd3b8bbf9d4c0f61aaf2023-11-19T08:25:57ZengMDPI AGMaterials1996-19442023-08-011617579210.3390/ma16175792Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage SystemsToshifumi Sugama0Tatiana Pyatina1Brookhaven National Laboratory, Upton, NY 11973-5000, USABrookhaven National Laboratory, Upton, NY 11973-5000, USAEnergy losses can be significantly reduced if thermally insulating cement is used for energy storage and recovery. The thermal conductivity (TC) of the currently used cement is between 1 and 1.2 W/mK. In this study we assessed the ability of polystyrene (PS)–polybutadiene (PB)–polyacrylic acid (PAA) terpolymer (cross-linked styrene–butadiene rubber, XSBR) latex to improve thermal insulating properties and thermal shock (TS) resistance of class G ordinary Portland cement (OPC) and fly ash cenosphere (FCSs) composites in the temperature range of 100–175 °C. The composites autoclaved at 100 °C were subjected to three cycles, one cycle: 175 °C heat → 25 °C water quenching). In hydrothermal and thermal (TS) environments at elevated temperatures in cement slurries the XSBR latex formed acrylic calcium complexes through acid–base reactions, and the number of such complexes increased at higher temperatures due to the XSBR degradation with formation of additional acrylic groups. As a result, these complexes offered the following five advanced properties to the OPC-based composites: (1) enhanced hydrophobicity; (2) decreased water-fillable porosity; (3) reduced TC for water-saturated composites; (4) minimized loss of compressive strength, Young’s modulus, and compressive fracture toughness after TS; and (5) abated pozzolanic activity of FCSs, which allowed FCSs to persist as thermal insulators under strongly alkaline conditions of cement slurries. Additionally, XSBR-modified slurries possessed improved workability and decreased slurry density due to the air-entraining effect of latex, which resulted in further improvement of thermal insulation performance of the modified composites.https://www.mdpi.com/1996-1944/16/17/5792lightweight cementthermally insulating cementreservoir thermal energy storagegeothermal cementthermal-shock-resistant cementhydrophobic cement |
| spellingShingle | Toshifumi Sugama Tatiana Pyatina Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems Materials lightweight cement thermally insulating cement reservoir thermal energy storage geothermal cement thermal-shock-resistant cement hydrophobic cement |
| title | Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems |
| title_full | Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems |
| title_fullStr | Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems |
| title_full_unstemmed | Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems |
| title_short | Hydrophobic, Thermal Shock-and-Corrosion-Resistant XSBR Latex-Modified Lightweight Class G Cement Composites in Geothermal Well Energy Storage Systems |
| title_sort | hydrophobic thermal shock and corrosion resistant xsbr latex modified lightweight class g cement composites in geothermal well energy storage systems |
| topic | lightweight cement thermally insulating cement reservoir thermal energy storage geothermal cement thermal-shock-resistant cement hydrophobic cement |
| url | https://www.mdpi.com/1996-1944/16/17/5792 |
| work_keys_str_mv | AT toshifumisugama hydrophobicthermalshockandcorrosionresistantxsbrlatexmodifiedlightweightclassgcementcompositesingeothermalwellenergystoragesystems AT tatianapyatina hydrophobicthermalshockandcorrosionresistantxsbrlatexmodifiedlightweightclassgcementcompositesingeothermalwellenergystoragesystems |