摘要
针对工业固废基胶凝材料力学性能不足、微观结构特征不明确等问题,构建碱渣-电石渣-矿渣-硅灰四元胶凝材料体系,采用宏观性能测试与微观表征相结合的方法,评价不同配比下材料体系的力学性能,揭示水化产物的形成机制和结构演变规律。研究结果表明:当碱渣、电石渣、矿渣、硅灰的质量比为8∶2∶14∶1时,胶凝材料强度较高,28d强度达到38.24MPa;碱渣和电石渣可协同激发体系活性;硅灰可作为增补材料提供硅铝成分,对体系的强度增长具有积极作用;材料主要水化产物为C-S-H和C-(A)-S-H。研究结论为低碳型水泥替代材料的应用提供参考。
Aiming at the problems of insufficient mechanical properties and unclear microstructure characteristics of industrial solid waste-based cementitious materials,a quaternary cementitious material system of alkali slagcarbide slag-slag-silica fume was constructed.The mechanical properties of the material system under different ratios were evaluated by means of macroscopic performance test and microscopic characterization,and the formation mechanism and structural evolution of hydration products were revealed.The results show that when the mass ratio of alkali slag,carbide slag,slag and silica fume is 8∶2∶14∶1,the strength of cementitious material is higher,and the strength of 28 d reaches 38.24 MPa.Alkaline slag and carbide slag can synergistically stimulate the activity of the system;the silica fume can be used as a supplementary material to provide silicon and aluminum components,which has a positive effect on the strength growth of the system.The main hydration products of the material are C-S-H and C-(A)-S-H.The research conclusions provide a reference for the application of low-carbon cement alternative materials.
作者
张延年
何明恒
ZHANG Yannian;HE Mingheng(School of Transportation Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《辽宁工程技术大学学报(自然科学版)》
北大核心
2025年第4期455-462,共8页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金项目(52234004)。
关键词
协同激发
全固废胶凝材料
固废
抗压强度
微观结构
synergisticstimulate
all-solid-wastegellingmaterials
solidwaste
compressivestrength
microstructure
