Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete
Biochar (BC), a byproduct of agricultural waste pyrolysis, shows potential as a sustainable substitute material for ordinary silicate cement (OPC) in concrete production, providing opportunities for environmental sustainability and resource conservation in the construction industry. However, the opt...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/7/2809 |
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| author | Yifu Ling Xionghua Wu Kanghao Tan Zhenjie Zou |
| author_facet | Yifu Ling Xionghua Wu Kanghao Tan Zhenjie Zou |
| author_sort | Yifu Ling |
| collection | DOAJ |
| description | Biochar (BC), a byproduct of agricultural waste pyrolysis, shows potential as a sustainable substitute material for ordinary silicate cement (OPC) in concrete production, providing opportunities for environmental sustainability and resource conservation in the construction industry. However, the optimal biochar dosage and fineness for enhancing concrete performance are still unclear. This study investigated the impact of these two factors on the mechanical and durability properties of biochar concrete. Compressive and flexural strength, carbonation resistance, and chloride ion penetration resistance were evaluated by varying biochar dosages (0%, 1%, 3%, 5%, 10%) and fineness dimensions (44.70, 73.28, 750, 1020 μm), with the 0% dosage serving as the control group (CK). The results showed that the addition of 1–3 wt% of biochar could effectively reduce the rapid carbonation depth and chloride diffusion coefficient of concrete. The compressive and flexural strength of BC concrete initially increased and then decreased with the increase in biocarbon content, BC with a fineness of 73.28 μm having the most significant effect on the mechanical strength of concrete. At the dosage of 3 wt%, BC was found to promote the hydration degree of cement, improving the formation of cement hydration products. These findings provide valuable insights for the development of sustainable and high-performance cement-based materials with the appropriate use of biochar as an additive. |
| first_indexed | 2024-03-11T05:31:57Z |
| format | Article |
| id | doaj.art-8da4a8ceec504d7fba7e875110e08920 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T05:31:57Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-8da4a8ceec504d7fba7e875110e089202023-11-17T17:05:26ZengMDPI AGMaterials1996-19442023-03-01167280910.3390/ma16072809Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of ConcreteYifu Ling0Xionghua Wu1Kanghao Tan2Zhenjie Zou3Key Laboratory of Disaster Prevention and Engineering Safety of Guangxi, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaGuangxi Highway Detection Co., Ltd., Nanning 530004, ChinaKey Laboratory of Disaster Prevention and Engineering Safety of Guangxi, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaKey Laboratory of Disaster Prevention and Engineering Safety of Guangxi, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, ChinaBiochar (BC), a byproduct of agricultural waste pyrolysis, shows potential as a sustainable substitute material for ordinary silicate cement (OPC) in concrete production, providing opportunities for environmental sustainability and resource conservation in the construction industry. However, the optimal biochar dosage and fineness for enhancing concrete performance are still unclear. This study investigated the impact of these two factors on the mechanical and durability properties of biochar concrete. Compressive and flexural strength, carbonation resistance, and chloride ion penetration resistance were evaluated by varying biochar dosages (0%, 1%, 3%, 5%, 10%) and fineness dimensions (44.70, 73.28, 750, 1020 μm), with the 0% dosage serving as the control group (CK). The results showed that the addition of 1–3 wt% of biochar could effectively reduce the rapid carbonation depth and chloride diffusion coefficient of concrete. The compressive and flexural strength of BC concrete initially increased and then decreased with the increase in biocarbon content, BC with a fineness of 73.28 μm having the most significant effect on the mechanical strength of concrete. At the dosage of 3 wt%, BC was found to promote the hydration degree of cement, improving the formation of cement hydration products. These findings provide valuable insights for the development of sustainable and high-performance cement-based materials with the appropriate use of biochar as an additive.https://www.mdpi.com/1996-1944/16/7/2809biocharcement-based materialsfinenessanti-carbonationchloride ion resistancemechanical strength |
| spellingShingle | Yifu Ling Xionghua Wu Kanghao Tan Zhenjie Zou Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete Materials biochar cement-based materials fineness anti-carbonation chloride ion resistance mechanical strength |
| title | Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete |
| title_full | Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete |
| title_fullStr | Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete |
| title_full_unstemmed | Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete |
| title_short | Effect of Biochar Dosage and Fineness on the Mechanical Properties and Durability of Concrete |
| title_sort | effect of biochar dosage and fineness on the mechanical properties and durability of concrete |
| topic | biochar cement-based materials fineness anti-carbonation chloride ion resistance mechanical strength |
| url | https://www.mdpi.com/1996-1944/16/7/2809 |
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