Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties
Biomass residues from the agricultural industry, logging and wood processing activities have become a valuable fuel source. If processed under pyrolysis combustion, several products are generated. Bio-oil and gases are essential alternatives to fossil coal-based fuels for energy and electricity prod...
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MDPI AG
2025-06-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/15/11/1949 |
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| author | Jaroslav Pokorný Radek Ševčík Lucie Zárybnická Jiří Šál Luboš Podolka |
| author_facet | Jaroslav Pokorný Radek Ševčík Lucie Zárybnická Jiří Šál Luboš Podolka |
| author_sort | Jaroslav Pokorný |
| collection | DOAJ |
| description | Biomass residues from the agricultural industry, logging and wood processing activities have become a valuable fuel source. If processed under pyrolysis combustion, several products are generated. Bio-oil and gases are essential alternatives to fossil coal-based fuels for energy and electricity production, whose need is constantly growing. Biochar, the porous carbon-based lightweight product, often ends up as a soil fertilizer. However, it can be applied in other industrial sectors, e.g., in plastics production or in modifying cementitious materials intended for construction needs. This work dealt with the application of small amounts of softwood-based biochar up to 2.0 wt.% on hydration kinetics and a wide range of physical and mechanical properties, such as water transport characteristics and flexural and compressive strengths of modified cement pastes. In the comparison with reference specimens, the biochar incorporation into cement pastes brought benefits like the reduction of open porosity, improvement of strength properties, and decreased capillary water absorption of 7-day and 28-day-cured cement pastes. Moreover, biochar-dosed cement pastes showed an increase in heat evolution during the hydration process, accompanied by higher consumption of clinker minerals. Considering all examined characteristics, the optimal dosage of softwood-derived biochar of 1.0 wt.% of Portland cement can be recommended. |
| format | Article |
| id | doaj-art-097d9a659a1840448f77aa7568ca1d64 |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj-art-097d9a659a1840448f77aa7568ca1d642025-08-20T02:33:06ZengMDPI AGBuildings2075-53092025-06-011511194910.3390/buildings15111949Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced PropertiesJaroslav Pokorný0Radek Ševčík1Lucie Zárybnická2Jiří Šál3Luboš Podolka4Institute of Technology and Business, Faculty of Technology, Department of Civil Engineering, Okružní 517/10, 370 01 České Budějovice, Czech RepublicInstitute of Technology and Business, Faculty of Technology, Department of Civil Engineering, Okružní 517/10, 370 01 České Budějovice, Czech RepublicInstitute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prosecká 809/76, 190 00 Praha, Czech RepublicInstitute of Technology and Business, Faculty of Technology, Department of Civil Engineering, Okružní 517/10, 370 01 České Budějovice, Czech RepublicInstitute of Technology and Business, Faculty of Technology, Department of Civil Engineering, Okružní 517/10, 370 01 České Budějovice, Czech RepublicBiomass residues from the agricultural industry, logging and wood processing activities have become a valuable fuel source. If processed under pyrolysis combustion, several products are generated. Bio-oil and gases are essential alternatives to fossil coal-based fuels for energy and electricity production, whose need is constantly growing. Biochar, the porous carbon-based lightweight product, often ends up as a soil fertilizer. However, it can be applied in other industrial sectors, e.g., in plastics production or in modifying cementitious materials intended for construction needs. This work dealt with the application of small amounts of softwood-based biochar up to 2.0 wt.% on hydration kinetics and a wide range of physical and mechanical properties, such as water transport characteristics and flexural and compressive strengths of modified cement pastes. In the comparison with reference specimens, the biochar incorporation into cement pastes brought benefits like the reduction of open porosity, improvement of strength properties, and decreased capillary water absorption of 7-day and 28-day-cured cement pastes. Moreover, biochar-dosed cement pastes showed an increase in heat evolution during the hydration process, accompanied by higher consumption of clinker minerals. Considering all examined characteristics, the optimal dosage of softwood-derived biochar of 1.0 wt.% of Portland cement can be recommended.https://www.mdpi.com/2075-5309/15/11/1949softwood residuesbiocharcement bindercement pastewater transport characteristicsmechanical properties |
| spellingShingle | Jaroslav Pokorný Radek Ševčík Lucie Zárybnická Jiří Šál Luboš Podolka Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties Buildings softwood residues biochar cement binder cement paste water transport characteristics mechanical properties |
| title | Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties |
| title_full | Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties |
| title_fullStr | Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties |
| title_full_unstemmed | Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties |
| title_short | Softwood-Based Biochar in the Design of Cement-Blended Binders with Advanced Properties |
| title_sort | softwood based biochar in the design of cement blended binders with advanced properties |
| topic | softwood residues biochar cement binder cement paste water transport characteristics mechanical properties |
| url | https://www.mdpi.com/2075-5309/15/11/1949 |
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