纳米二氧化硅对白水泥基3D打印材料结构变形、流变及力学性能的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (6): 1855-1862.

• 3D 打印水泥基材料 • 上一篇下一篇

纳米二氧化硅对白水泥基3D打印材料结构变形、流变及力学性能的影响

金源¹, 徐嘉宾¹, 孙登田², 陈明旭¹, 黄永波¹, 芦令超¹, 程新¹

1.济南大学,山东省建筑材料制备与测试技术重点实验室,济南 250022;
2.山东省乡镇企业建材质量监督检验中心,泰安 271000

收稿日期:2021-04-01 修回日期:2021-05-08 出版日期:2021-06-15 发布日期:2021-07-08
通讯作者: 芦令超,博士,教授。E-mail:lingchao_lu@163.com
作者简介:金源(1997—),女,硕士研究生。主要从事建筑材料3D打印的研究。E-mail:yuan_jin@mail.ujn.edu.cn
基金资助:
国家自然科学基金(52072147)

Effect of Nano-Silica on Structural Deformation, Rheological and Mechanical Properties of 3D Printed White Portland Cement-Based Materials

JIN Yuan¹, XU Jiabin¹, SUN Dengtian², CHEN Mingxu¹, HUANG Yongbo¹, LU Lingchao¹, CHENG Xin¹

1. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China;
2. Shandong Provincial Township Enterprise Quality Supervision and Inspection Centre of Building Materials, Taian 271000, China

Received:2021-04-01 Revised:2021-05-08 Online:2021-06-15 Published:2021-07-08

摘要/Abstract

摘要： 与传统建筑材料相比,3D打印建筑材料的结构建立对打印材料的流变性能具有更高的要求。通过引入纳米二氧化硅来调控白水泥基3D打印材料的流变性能,旨在稳定打印后的浆体结构和改善材料的力学性能。研究表明,纳米二氧化硅的掺入可以明显缩短浆体的凝结时间,改善其早期力学性能。同时,纳米二氧化硅的掺入能够提高浆体的屈服应力和弹性模量,这有利于浆体抵抗自身的重力,降低打印结构变形。此外,当纳米二氧化硅掺量达到0.5%(质量分数)时,白水泥基3D打印材料的3 d抗压强度和抗折强度分别可以达到46.9 MPa和6.1 MPa。从流变参数的相关性分析可以看出,动态屈服性能对打印结构变形的影响较小,静态屈服应力对打印结构变形的影响较大。综上所述,在白水泥基3D打印材料中引入纳米二氧化硅可以很好地调控浆体的流变性能,改善3D打印结构和早期力学性能。

关键词: 白水泥, 纳米二氧化硅, 3D打印, 流变性能, 力学性能, 凝结时间, 结构变形

Abstract: Compared with the traditional building materials, the printed structure build-up of 3D printed building materials proposes higher requirements on the rheological properties. The nano-silica was introduced to control the rheological properties of 3D printed white Portland cement-based materials, aiming to stabilize the paste structure and improve the mechanical properties. The experimental results show that the nano-silica shortens the setting time significantly, and improves the early mechanical properties of 3D printed white Portland cement-based materials. Meanwhile, the addition of nano-silica in 3D printed white Portland cement-based materials improves the yield stress and elastic modulus, which is conducive to resist its own gravity and reduce printed structural deformation. In addition, the 3 d compressive strength and flexural strength reach up to 46.9 MPa and 6.1 MPa, respectively, when the dosage of nano-silica reaches 0.5% (mass fraction). Based on the correlation of multiple rheological parameters, the dynamic yield behaviors present little influence on the deformation of the 3D printed structure, while the static yield stress presents the reverse phenomenon, which influences the structural deformation obviously. In conclusion, the introduction of nano-silica into the 3D printed white Portland cement-based materials can well control the rheological properties, and improve the printed structures and early mechanical properties.

Key words: white Portland cement, nano-silica, 3D printing, rheological property, mechanical property, setting time, structural deformation

中图分类号:

TQ172

金源, 徐嘉宾, 孙登田, 陈明旭, 黄永波, 芦令超, 程新. 纳米二氧化硅对白水泥基3D打印材料结构变形、流变及力学性能的影响[J]. 硅酸盐通报, 2021, 40(6): 1855-1862.

JIN Yuan, XU Jiabin, SUN Dengtian, CHEN Mingxu, HUANG Yongbo, LU Lingchao, CHENG Xin. Effect of Nano-Silica on Structural Deformation, Rheological and Mechanical Properties of 3D Printed White Portland Cement-Based Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(6): 1855-1862.

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纳米二氧化硅对白水泥基3D打印材料结构变形、流变及力学性能的影响

Effect of Nano-Silica on Structural Deformation, Rheological and Mechanical Properties of 3D Printed White Portland Cement-Based Materials

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