Modification effect of nanosilica and polypropylene fiber for extrusion-based 3D printing concrete: Printability and mechanical anisotropy
文献类型：期刊论文
| 作者 | Jiang, Quan1; Liu, Qiang1,3; Wu, Si1; Zheng, Hong1; Sun, Wenliang2 |
| 刊名 | ADDITIVE MANUFACTURING
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 56期号:-页码:- |
| 关键词 | Additive manufacturing Nanosilica Polypropylene fiber Printability Mechanical anisotropy |
| ISSN号 | 2214-8604 |
| 英文摘要 | Recently cement-based 3D printing (3DP) technology has been broadly adopted in civil engineering, and its printability is an important factor for its further application. Taking cement, fine sand and thickener as the basic formula, hybrid nanosilica (NS) and polypropylene (PP) fibers with different dosages are tested to comparing their modification effects on 3DP concrete's printability and mechanical anisotropy. The mortar flowability, printability, physical-mechanical properties and microstructure of these modified 3DP concretes are tested. The results demonstrated that both NS and PP fibers can accelerate the setting time of mortar, reduce its paste fluidity and slump, and improve its printability and homogeneity. But its density and compressive strength are reduced. Specifically, adding 1% NS and 0.2% PP fibers to 3DP concrete can improve its buildability by more than 67%, reduce the deformation rate up to 46% and the anisotropy of compressive strength up to 64%. These additive material also make the structure change from brittle failure to ductile failure, which is beneficial to structural safety. The microstructure analysis of these presented 3DP concrete shows that the NS can increase the number of concrete's micro pores and improve both its pore structure and the cementation property between layers, which can enhance the cementation between PP fibers and cement paste. These results can enrich the 3D-printed cement construction in additive manufacturing. |
| 学科主题 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000816015300003 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35008]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 2.Yalong River Hydropower Development Company, Ltd., Chengdu, Sichuan 610051, China 3.School of Civil Engineering and Architecture, Nanchang University, Nanchang, Jiangxi 330031, China |
| 推荐引用方式 GB/T 7714 | Jiang, Quan,Liu, Qiang,Wu, Si,et al. Modification effect of nanosilica and polypropylene fiber for extrusion-based 3D printing concrete: Printability and mechanical anisotropy[J]. ADDITIVE MANUFACTURING,2022,56(-):-. |
| APA | Jiang, Quan,Liu, Qiang,Wu, Si,Zheng, Hong,&Sun, Wenliang.(2022).Modification effect of nanosilica and polypropylene fiber for extrusion-based 3D printing concrete: Printability and mechanical anisotropy.ADDITIVE MANUFACTURING,56(-),-. |
| MLA | Jiang, Quan,et al."Modification effect of nanosilica and polypropylene fiber for extrusion-based 3D printing concrete: Printability and mechanical anisotropy".ADDITIVE MANUFACTURING 56.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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