新拌石灰石粉-偏高岭土-水泥系统流变特性研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (2): 411-419.

所属专题：水泥混凝土

新拌石灰石粉-偏高岭土-水泥系统流变特性研究

李威, 刘豫, 李慧, 于欣欣, 朱建平

河南理工大学材料科学与工程学院,焦作 454000

收稿日期:2022-10-24 修订日期:2022-11-21 出版日期:2023-02-15 发布日期:2023-03-07
通信作者: 刘豫,博士,副教授。E-mail:liuyu@hpu.edu.cn
作者简介:李威(1995—),男,硕士研究生。主要从事水泥基材料流变性能的研究。E-mail:876779923@qq.com
基金资助:
河南理工大学返校博士基金(722103)

Rheological Properties of Fresh Limestone-Metakaolin-Cement System

LI Wei, LIU Yu, LI Hui, YU Xinxin, ZHU Jianping

School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Received:2022-10-24 Revised:2022-11-21 Online:2023-02-15 Published:2023-03-07

摘要/Abstract

摘要： 石灰石粉和偏高岭土复掺可以替代部分水泥,有效降低水泥制品的碳排放。采用安东帕MCR 302旋转流变仪测试了新拌石灰石粉-偏高岭土-水泥浆体系统的流变特性。通过单纯形重心法对石灰石粉-偏高岭土-水泥砂浆系统进行了试验设计,利用Viscometer 5型混凝土流变仪对不同配比砂浆的流变特性进行了测试。结果表明:随着偏高岭土掺量的增加,水泥浆体的屈服应力和塑性黏度显著增大;随着石灰石粉掺量的增加,水泥浆体的屈服应力和塑性黏度呈先增大后减小的趋势;改变砂浆胶凝材料的配比能够显著影响砂浆的流动性以及流变参数。

关键词: 偏高岭土, 石灰石粉, 流变特性, 屈服应力, 塑性黏度, 坍落扩展度, 单纯形重心法, Bingham模型

Abstract: Limestone and metakaolin partially replace cement can effectively reduce the carbon emissions of cement products. The rheological properties of fresh limestone-metakaolin-cement paste system were tested by Antonpa MCR 302 rotary rheometer. Simplex barycenter method was applied to limestone-metakaolin-cement mortar system. The rheological properties of mortar with different ratios were tested by Viscometer 5 concrete rheometer. The results show that the yield stress and the plastic viscosity of cement paste increase significantly with the increase of metakaolin content. However, with the increase of limestone, the yield stress and the plastic viscosity of cement paste increase first and then decrease. Changing the ratio of binders significantly affects the fluidity and the rheological parameters of mortar.

Key words: metakaolin, limestone, rheological property, yield stress, plastic viscosity, slump expansion, simplex barycenter method, Bingham model

中图分类号:

TU528

李威, 刘豫, 李慧, 于欣欣, 朱建平. 新拌石灰石粉-偏高岭土-水泥系统流变特性研究[J]. 硅酸盐通报, 2023, 42(2): 411-419.

LI Wei, LIU Yu, LI Hui, YU Xinxin, ZHU Jianping. Rheological Properties of Fresh Limestone-Metakaolin-Cement System[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(2): 411-419.

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新拌石灰石粉-偏高岭土-水泥系统流变特性研究

Rheological Properties of Fresh Limestone-Metakaolin-Cement System

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