基于水膜厚度的高强自密实混凝土水泥浆体流变性能评价

doi:10.16552/j.cnki.issn1001-1625.2025.0218

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (9): 3188-3195.DOI: 10.16552/j.cnki.issn1001-1625.2025.0218

基于水膜厚度的高强自密实混凝土水泥浆体流变性能评价

胡延燕, 谢冰倩, 赵冰

西安建筑科技大学材料科学与工程学院,西安 710055

收稿日期:2025-02-28 修订日期:2025-03-31 出版日期:2025-09-15 发布日期:2025-09-19
通信作者: 谢冰倩,硕士研究生。E-mail:1964056084@qq.com
作者简介:胡延燕(1980—),女,博士,副教授。主要从事高强高性能混凝土、先进水泥基材料及特种混凝土等方向的研究。E-mail:huyanyan@xauat.edu.cn
基金资助:
国家自然科学基金(52208287)

Evaluation of Rheological Properties of High-Strength Self-Compacting Concrete Cement Paste Based on Water Film Thickness

HU Yanyan, XIE Bingqian, ZHAO Bing

College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

Received:2025-02-28 Revised:2025-03-31 Published:2025-09-15 Online:2025-09-19

摘要/Abstract

摘要： 为探究超细粉煤灰(UFA)对高强自密实混凝土(HSSCC)水泥浆体流变性能的影响,本文测试了不同掺量UFA对C60和C80 HSSCC水泥浆体流动度、流变性能、填充密实度及水膜厚度(WFT)的影响。结果表明:当UFA掺量为15%(质量分数)时,两种水泥浆体的流动度均达到最大值,屈服应力、表观黏度及触变性达到最小值,两种水泥浆体的填充密实度也达到最大;C80 HSSCC水泥浆体填充密实度高于C60 HSSCC水泥浆体,WFT小于C60 HSSCC水泥浆体。C60 HSSCC水泥浆体的WFT为0.195 7 μm,C80 HSSCC水泥浆体的WFT为0.037 1 μm。采用多项式回归拟合发现,WFT与水泥浆体屈服应力有很强的相关性。

关键词: 超细粉煤灰, 水泥浆体, 流变性能, 屈服应力, 填充密实度, 水膜厚度

Abstract: To investigate the effect of ultrafine fly ash (UFA) on the rheological properties of cement paste in high-strength self-compacting concrete (HSSCC), this study tested the influences of different UFA dosages on the fluidity, rheological properties, packing density, and water film thickness (WFT) of C60 and C80 HSSCC cement pastes. The results show that when the UFA dosage is 15% (mass fraction), the fluidity of both cement pastes reaches their maximum, while the yield stress, apparent viscosity, and thixotropy reach their minimum. At this dosage, the packing density of both cement pastes is also at their highest. The packing density of C80 HSSCC cement paste is higher than that of C60 HSSCC cement paste, whereas the WFT of C80 HSSCC cement paste is lower than that of C60 HSSCC cement paste. Specifically, the WFT of C60 HSSCC cement paste is 0.195 7 μm, while that of C80 HSSCC cement paste is 0.037 1 μm. Polynomial regression fitting reveals a strong correlation between WFT and the yield stress of cement paste.

Key words: ultrafine fly ash, cement paste, rheological property, yield stress, packing density, water film thicknes

中图分类号:

TU528

胡延燕, 谢冰倩, 赵冰. 基于水膜厚度的高强自密实混凝土水泥浆体流变性能评价[J]. 硅酸盐通报, 2025, 44(9): 3188-3195.

HU Yanyan, XIE Bingqian, ZHAO Bing. Evaluation of Rheological Properties of High-Strength Self-Compacting Concrete Cement Paste Based on Water Film Thickness[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(9): 3188-3195.

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基于水膜厚度的高强自密实混凝土水泥浆体流变性能评价

Evaluation of Rheological Properties of High-Strength Self-Compacting Concrete Cement Paste Based on Water Film Thickness

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