硅酸盐通报2026，Vol.45Issue(4)：1193-1207,15.DOI:10.16552/j.cnki.issn1001-1625.2025.1001
振动搅拌对粉煤灰混凝土性能与碳排放的影响
Effect of Vibration Mixing on Performance and Carbon Emissions of Fly Ash Concrete
朱世栋 1陈纨年 1李忠慧 2张宇 2张云升 3李王鑫2
作者信息
- 1. 甘肃路桥建设集团有限公司,兰州 730030
- 2. 兰州理工大学土木与水利工程学院,兰州 730050
- 3. 兰州理工大学土木与水利工程学院,兰州 730050||东南大学材料科学与工程学院,南京 211189
- 折叠
摘要
Abstract
With the increasing demand for low-carbon and high-performance concrete,evaluating the effect of vibration mixing on the microstructure,durability,and life-cycle carbon emissions of fly ash concrete is essential for advancing green construction technologies and emission-reduction strategies.In this study,the effect of vibration mixing process on the mechanical properties,frost resistance enhancement,microstructure and carbon emission of fly ash concrete was systematically investigated.The vibration mixing method was compared with the conventional mixing method through preparing concrete specimens under five mix proportions with different fly ash content.The macroscopic properties were evaluated according to the results of compressive tests and rapid freeze-thaw cycle tests.The characteristics of porosity,hydration degree and interfacial transition zone(ITZ)were characterized by nuclear magnetic resonance(NMR),thermogravimetric analysis(TG/DTG),scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS)and microhardness test,respectively.Besides,life cycle assessment(LCA)was applied to quantify carbon dioxide emissions.The results indicate that compared with the conventional mixing method,the vibration mixing method significantly improves the compressive strength and frost resistance of fly ash concrete.The porosity of fly ash concrete decreases by 3.46％under the vibration mixing method,in which the hydration process of the cement and the pozzolanic reaction of the fly ash are effectively promoted.And the ITZ is better optimized,which manifests as higher microhardness and a denser bonding interface.According to the LCA results,while maintaining or enhancing the properties of concrete,the vibration mixing method can reduce carbon dioxide emissions in the preparation process of fly ash concrete by 14～20 kg/m3.关键词
粉煤灰混凝土/振动搅拌/宏观性能/微观结构/全生命周期/碳排放Key words
fly ash concrete/vibration mixing/macroscopic property/microstructure/life cycle assessment/carbon emission分类
建筑与水利引用本文复制引用
朱世栋,陈纨年,李忠慧,张宇,张云升,李王鑫..振动搅拌对粉煤灰混凝土性能与碳排放的影响[J].硅酸盐通报,2026,45(4):1193-1207,15.
