Microbial-induced carbonate reinforcement for 3D-printed concrete: testing in printable and mechanical strength
文献类型：期刊论文
| 作者 | Zhao, Herui2; Jiang, Quan2; Xia, Yong1; Liu, Jian2; Hou, Dongqi1; Chen, Pengfei2; Liu, Jianpo3 |
| 刊名 | MATERIALS AND STRUCTURES
 |
| 出版日期 | 2024-11-01 |
| 卷号 | 57期号:9页码:19 |
| 关键词 | 3D printing materials MICP Printability Mechanical performance Microstructure |
| ISSN号 | 1359-5997 |
| DOI | 10.1617/s11527-024-02502-y |
| 英文摘要 | This study introduces a microbial-induced calcium precipitation technique into cement-based 3D printing by incorporating Bacillus pasteurii into 3D printing (3DP) mortar. The printability, physical-mechanical properties, and microstructure are analyzed to compare the differences between control concrete and bacterial concrete. Experimental results demonstrated that mixing bacteria in 3DP mortars can enhance printability and increase the uniaxial compressive strength (UCS) and Brazilian splitting tensile strength of printed specimens. Particularly, this method significantly improved the interlayer strength of 3DP concrete. With a bacterial concentration of 1 x 10<^>7 cells/ml, the UCS improved by 35.8% and 57.3% in the YZ and XY directions, respectively, compared to the control concrete UCS. The tensile strength in the YZ direction improved by 23.65% compared to control concrete at the same bacterial concentration. Moreover, the tensile strength in the XY direction continued to improve with increasing bacterial concentration, while it decreased in the YZ direction, indicating that incorporating bacteria is an effective method for enhancing interlayer tensile strength. Additionally, nitrogen adsorption results revealed that mixing bacteria reduced pore volume and surface area of printed specimens, leading to denser microstructure by filling granular calcium carbonate precipitates at internal pores of 3D-printed concrete, as observed by SEM and XRD. These findings offer a new approach for modifying cement-based 3D-printing mortars and provide valuable insights for enhancing the mechanical performance of architectural 3DP concrete, thereby promoting the advancement of cement-based 3DP technology. |
| 资助项目 | National Natural Science Foundation of China[52325905] ; National Natural Science Foundation of China[2023YFC2907204] ; National key research and development plan project of China |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001345935400001 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43012]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Jiang, Quan |
| 作者单位 | 1.PowerChina Chengdu Engn Corp Ltd, Chengdu 610017, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Northeastern Univ, Shenyang 110167, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Herui,Jiang, Quan,Xia, Yong,et al. Microbial-induced carbonate reinforcement for 3D-printed concrete: testing in printable and mechanical strength[J]. MATERIALS AND STRUCTURES,2024,57(9):19. |
| APA | Zhao, Herui.,Jiang, Quan.,Xia, Yong.,Liu, Jian.,Hou, Dongqi.,...&Liu, Jianpo.(2024).Microbial-induced carbonate reinforcement for 3D-printed concrete: testing in printable and mechanical strength.MATERIALS AND STRUCTURES,57(9),19. |
| MLA | Zhao, Herui,et al."Microbial-induced carbonate reinforcement for 3D-printed concrete: testing in printable and mechanical strength".MATERIALS AND STRUCTURES 57.9(2024):19. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。