矿物掺合料复掺对超高性能湿接缝混凝土性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (3): 948-955.

所属专题：资源综合利用

矿物掺合料复掺对超高性能湿接缝混凝土性能的影响

盖珂瑜^1,2, 龙勇^1,2, 陈露一^1,3, 李信^1,3, 刘开志^1,2, 王宇^1,2, 孙涛⁴

1.桥梁智能与绿色建造全国重点实验室,武汉 430034;
2.中铁大桥科学研究院有限公司,武汉 430034;
3.中铁桥研科技有限公司,武汉 430034;
4.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070

收稿日期:2023-10-02 修订日期:2023-11-24 出版日期:2024-03-15 发布日期:2024-03-27
作者简介:盖珂瑜(1993—),男,工程师。主要从事生态建筑材料方面的研究。E-mail:1327530794@qq.com
基金资助:
湖北省科技厅创新发展项目(2021BLB155);中国中铁股份有限公司科技研究开发计划(2020-25-重点)

Effects of Mixing Mineral Admixtures on Properties of Ultra High Performance Wet-Joint Concrete

GE Keyu^1,2, LONG Yong^1,2, CHEN Luyi^1,3, LI Xin^1,3, LIU Kaizhi^1,2, WANG Yu^1,2, SUN Tao⁴

1. National Key Laboratory of Bridge Intelligent and Green Construction, Wuhan 430034, China;
2. China Railway Bridge Science Research Institute, Ltd., Wuhan 430034, China;
3. China Railway Britech Co. Ltd., Wuhan 430034, China;
4. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Received:2023-10-02 Revised:2023-11-24 Online:2024-03-15 Published:2024-03-27

摘要/Abstract

摘要： 采用石灰石粉和粉煤灰微珠作为调节超高性能湿接缝混凝土性能的矿物掺合料,通过设置石灰石粉和粉煤灰微珠的不同复掺比例,研究了两种矿物掺合料对超高性能湿接缝混凝土流变性能、力学性能、收缩性能和抗渗性能的影响,并采用水化热分析了超高性能湿接缝混凝土的水化特性。结果表明:当石灰石粉掺量高于30%(质量分数)时,随着石灰石粉掺量的增加,超高性能湿接缝混凝土的塑性黏度先增大后减小,复掺50%石灰石粉和50%(质量分数)粉煤灰微珠时,混凝土塑性黏度可降低38.0%;掺入石灰石粉可以促进水泥的早期水化,提高超高性能湿接缝混凝土的早期抗压强度,3 d抗压强度最大涨幅为11.6%;复掺石灰石粉和粉煤灰微珠可以降低超高性能湿接缝混凝土的自收缩;当复掺30%石灰石粉时,超高性能湿接缝混凝土的抗渗性能最优,28 d氯离子扩散系数为0.15×10^-12 m²/s。

关键词: 超高性能湿接缝混凝土, 石灰石粉, 粉煤灰微珠, 塑性黏度, 水化热, 抗压强度, 收缩性能, 抗渗性能

Abstract: Limestone powder and fly ash microbeads were used as mineral admixtures to adjust the properties of ultra high performance wet-joint concrete. The effects of limestone powder and fly ash microbeads on rheological properties, mechanical properties, shrinkage properties and impermeability of ultra high performance wet-joint concrete were studied by setting different mixing ratios. In addition, the hydration performance of ultra high performance wet-joint concrete was analyzed by hydration heat. The results show that when limestone powder is higher than 30% (mass fraction), with the increase content of limestone powder, the plastic viscosity of ultra high performance wet-joint concrete increases first and then decreases. The plastic viscosity of concrete is reduced by 38.0% when added with 50% limestone powder and 50% (mass fraction) fly ash microbeads. The addition of limestone powder promotes the early hydration of cement and improves the early compressive strength of ultra high performance wet-joint concrete, and the maximum growth rate of 3 d compressive strength is 11.6%. The autogenous shrinkage of ultra high performance wet-joint concrete is reduced by adding limestone powder and fly ash microbeads. The impermeability of ultra high performance wet-joint concrete is the best when the content of limestone powder is 30%, and the 28 d chloride ion diffusion coefficient is 0.15×10^-12 m²/s.

Key words: ultra high performance wet-joint concrete, limestone powder, fly ash microbead, plastic viscosity, hydration heat, compressive strength, shrinkage property, impermeability property

中图分类号:

TU528

盖珂瑜, 龙勇, 陈露一, 李信, 刘开志, 王宇, 孙涛. 矿物掺合料复掺对超高性能湿接缝混凝土性能的影响[J]. 硅酸盐通报, 2024, 43(3): 948-955.

GE Keyu, LONG Yong, CHEN Luyi, LI Xin, LIU Kaizhi, WANG Yu, SUN Tao. Effects of Mixing Mineral Admixtures on Properties of Ultra High Performance Wet-Joint Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(3): 948-955.

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矿物掺合料复掺对超高性能湿接缝混凝土性能的影响

Effects of Mixing Mineral Admixtures on Properties of Ultra High Performance Wet-Joint Concrete

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