[1]龚春燕,蒋亚清,王 玉,等.PCE-Nc对3DPC可打印时间的影响[J].南京师大学报(自然科学版),2022,45(01):17-21.[doi:10.3969/j.issn.1001-4616.2022.01.004]
　Gong Chunyan,Jiang Yaqing,Wang Yu,et al.Effect of PCE-Nc on Printable Time of 3DPC[J].Journal of Nanjing Normal University(Natural Science Edition),2022,45(01):17-21.[doi:10.3969/j.issn.1001-4616.2022.01.004]
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PCE-Nc对3DPC可打印时间的影响()
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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第45卷
期数:
2022年01期
页码:
17-21
栏目:
·物理学·
出版日期:
2022-03-15

文章信息/Info

Title:
Effect of PCE-Nc on Printable Time of 3DPC
文章编号:
1001-4616(2022)01-0017-05
作者:
龚春燕; 蒋亚清; 王 玉; 潘亭宏
(河海大学力学与材料学院,江苏 南京 211100)
Author(s):
Gong Chunyan; Jiang Yaqing; Wang Yu; Pan Tinghong
(School of Mechanics and Materials,Hohai University,Nanjing 211100,China)
关键词:
水泥基材料; 结构化速率; 流变性能; 电阻率; 静态屈服应力; 聚羧酸减水剂
Keywords:
cement-base material; structuring rate; rheological properties; resistivity; static yield stress; polycarboxylate superplasticizer
分类号:
TU528
DOI:
10.3969/j.issn.1001-4616.2022.01.004
文献标志码:
A
摘要:
为了改善3D打印水泥基材料(3D-printed cement-based materials,3DPC)可打印状态,本文通过研究流变性能的相关参数,建立了静态屈服应力时变速率模型,得到了3D打印(3D-printed,3DP)的最大可操作时间点(maximal operating time,MOT). 再结合水泥水化动力学过程,通过非接触式电阻率仪测试得到水泥水化诱导期的开始时间,拟合得到诱导期与MOT之间的关系,试验结果表明,MOT出现在诱导期开始前的某一时刻. 且随着纳米粘土(Nc)掺量的增加,掺聚羧酸减水剂的水泥基材料诱导期开始时间提前,进而3DP可操作时间减短. 本研究为延长3DPC可打印时间提供了理论基础.
Abstract:
In order to improve the printability state of 3D printed cement-base materials(3DPC)by studiyng the relevant parameters of rheological properties,a time-varying rate model of static yield stress is established,and the maximum operable time point(maximum operating time,MOT)of three-dimensional printing(3DP)is obtained. Combined with the dynamic process of cement hydration,the start time of cement hydration induction period is obtained through non-contact resistivity test,and the relationship between induction period and Mott is fitted. The test results show that Mott appears at a certain time before the beginning of induction period. With the increase of the content of nano clay(Nc),the induction period of cement-based materials mixed with polycarboxylate superplasticizer is advanced,and the 3DP operable time is shortened. The study provides a theoretical basis for prolonging the printable time of 3DPC.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-06-07.
基金项目:国家自然科学基金重点项目(51738003).
通讯作者:蒋亚清,博士,教授,博士生导师,研究方向:高性能水泥基材料理论及基础、混凝土外加剂等. E-mail:yqjiang@hhu.edu.cn
更新日期/Last Update: 1900-01-01