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材料导报  2025, Vol. 39 Issue (1): 23100044-9    https://doi.org/10.11896/cldb.23100044
  无机非金属及其复合材料 |
大掺量钢渣微粉-水泥泡沫轻质土的孔结构表征及其对力学性能的影响
张彩利1,2,*, 王怀毅1,2, 王犇3,*, 于焱龙1,2, 张崇僖1,2
1 河北工业大学土木与交通学院, 天津 300401
2 天津市交通工程绿色材料技术工程中心, 天津 300401
3 黑龙江龙高公路养护工程有限公司, 哈尔滨 150000
Characterization of the Porous Structure and Its Influence on Mechanical Properties of High-Content Steel Slag Powder-Cement Foamed Concrete
ZHANG Caili1,2,*, WANG Huaiyi1,2, WANG Ben3,*, YU Yanlong1,2, ZHANG Chongxi1,2
1 School of Civil and Transportation, Hebei University of Technology, Tianjin 300401, China
2 Tianjin Traffic Engineering Green Material Technology Engineering Center, Tianjin 300401, China
3 Heilongjiang Longgao Highway Maintenance Engineering Co.,Ltd., Harbin 150000, China
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摘要 为研究大掺量钢渣微粉-水泥泡沫轻质土中孔隙结构与力学性能的关系,采用计算机断层扫描技术(X-CT)分析不同钢渣微粉掺量、水灰比、湿密度等级条件下泡沫轻质土孔结构特征参数的变化规律,并运用灰色关联方法分析孔结构特征参数与抗压强度之间的关系。研究结果表明,钢渣微粉掺量增加、湿密度等级降低f都将导致孔隙率增大、球度值降低、孔径增大;球度值、孔径随水灰比增大而增大,孔隙率则与水灰比成负相关关系;主要孔隙类型为球状孔隙且球度值与孔体积呈负相关关系;孔结构特征参数均与泡沫轻质土抗压强度关系紧密,其中孔隙率对强度影响最大,且孔径小于0.5 mm和0.5～1 mm之间的孔隙对抗压强度影响最大;孔隙形状中球状孔隙灰关联度最大且越近似球状的孔隙对抗压强度影响越大。研究结果对钢渣废弃物资源化循环利用有一定借鉴意义。
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张彩利
王怀毅
王犇
于焱龙
张崇僖
关键词:  钢渣微粉  泡沫轻质土  抗压强度  孔隙率  灰色关联度    
Abstract: To investigate the relationship between pore structure and mechanical properties in high-content steel slag powder foamed concrete, X-ray computer tomography (X-CT) technology wasused to analyze variations of pore structure characteristic parameters of foamed concrete under different conditions, including steel slag powder content, water-cement ratios, and wet density levels. Meanwhile, using the grey correlation theory, analyzed the correlation between various pore structure characteristic parameters and mechanical properties of the concrete. The results revealed that an increase in steel slag powder content, or a decrease in wet density levels should lead to an increase of porosity, a decrease of sphericity values, and an increase of pore sizes. Conversely, an increase of water-cement ratio should decrease porosity, increase sphericity values, and enlarge pore sizes. Spherical pores are the predominant pore type, and there is a negative correlation between sphericity values and pore volume. Characteristic parameters of pore structure are closely related to the compressive strength, and porosity has the greatest influence on the compressive strength. And the pore size smaller than 0.5 mm and between 0.5 mm to 1 mm have the greatest influence on compressive strength. Considering pore shapes, spherical pores exhibit the highest grey correlation, which indicates that the more similar the spherical pore has the greater influence on compressive strength. These findings hold practical implications for the resourceful recycling of steel slag waste.
Key words:  steel slag powder    foamed concrete    compressive strength    porosity    grey correlation degree
出版日期:  2025-01-10      发布日期:  2025-01-10
ZTFLH:  U414  
基金资助: 国家自然科学基金(52008154);河北省自然科学基金(E2021202074)
通讯作者:  *张彩利,河北工业大学土木与交通学院副教授、硕士研究生导师。2004年长安大学道路与铁道工程专业硕士毕业后到河北工业大学工作至今,2012年河北工业大学结构工程专业博士毕业。目前主要从事固废资源化利用、新型道路建筑材料、路面养护新技术等方向的理论与试验研究。zhangcailimeng@163.com;王犇,硕士。主要从事固废资源化利用与新型建筑材料方面的研究。Wb17602210485@163.com   
引用本文:    
张彩利, 王怀毅, 王犇, 于焱龙, 张崇僖. 大掺量钢渣微粉-水泥泡沫轻质土的孔结构表征及其对力学性能的影响[J]. 材料导报, 2025, 39(1): 23100044-9.
ZHANG Caili, WANG Huaiyi, WANG Ben, YU Yanlong, ZHANG Chongxi. Characterization of the Porous Structure and Its Influence on Mechanical Properties of High-Content Steel Slag Powder-Cement Foamed Concrete. Materials Reports, 2025, 39(1): 23100044-9.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.23100044  或          https://www.mater-rep.com/CN/Y2025/V39/I1/23100044
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