氧化石墨烯对新拌水泥浆体流变性的影响

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2159-2164.

氧化石墨烯对新拌水泥浆体流变性的影响

焦敏

重庆工程学院土木工程学院,重庆 400056

收稿日期:2020-09-17 修回日期:2020-10-27 出版日期:2021-07-15 发布日期:2021-08-04
作者简介:焦敏(1988—),女,工程师。主要从事建筑材料、工程造价、项目管理、建筑安装工程研究。E-mail:jiaomcvm@163.com
基金资助:
重庆市教育委员会2020年度市教委科学技术研究计划(KJQN202001909)

Influence of Graphene Oxide on Rheological Properties of Fresh Cement Paste

JIAO Min

College of Civil Engineering, Chongqing Institute of Engineering, Chongqing 400056, China

Received:2020-09-17 Revised:2020-10-27 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 随着纳米材料和技术不断发展,关于氧化石墨烯对水泥基材料改性作用的相关研究越来越受到重视。在此背景下,通过Anton Paar Rheolab QC型旋转黏度计研究了氧化石墨烯对新拌水泥浆体流变性的影响,并测试了浆体静态屈服应力、动态屈服应力和黏度系数以及触变环面积。结果表明:相同氧化石墨烯掺量下,随浆体静置时间延长,低剪切速率下浆体的静态屈服应力逐渐增大;随氧化石墨烯掺量增大,浆体结构建立参数、动态屈服应力和黏度系数先增大后减小,而触变滞后环面积则呈现相反的变化趋势。

关键词: 氧化石墨烯, 水泥浆体, 静态流变性能, 动态流变性能, 触变性

Abstract: With the continuous development of nano-materials and technology, more and more attention has been paid to the modification of cement-based materials by graphene oxide. In this context, the influence of graphene oxide on the rheological properties of fresh cement paste was studied by Anton Paar Rheolab QC rheometer, and the static yield stress, dynamic yield stress, viscosity coefficient and thixotropic ring area of the paste were measured. The results show that under the same content of graphene oxide, the longer the paste resting time is, the higher the static yield stress is. With the increase ofthe graphene oxide content, the paste microstructure establishment parameters, dynamic yield stress, and viscosity coefficient first increase and then decrease, while the thixotropic loop area shows an opposite changing trend.

Key words: graphene oxide, cement paste, static rheological property, dynamic rheological property, thixotropy

中图分类号:

TU528

焦敏. 氧化石墨烯对新拌水泥浆体流变性的影响[J]. 硅酸盐通报, 2021, 40(7): 2159-2164.

JIAO Min. Influence of Graphene Oxide on Rheological Properties of Fresh Cement Paste[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2159-2164.

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