硅酸钠改善碱激发材料力学性能与凝结机理分析  

Research on Improvement of Mechanical Properties and Condensation Mechanism on Alkali Activated Materials by Sodium Silicate

作　　者：顾小娟[1] 韩文娟[1] 田小娟[1] GU Xiao-juan;HAN Wen-juan;TIAN Xiao-juan(Jianghai Polytechnic College,Yangzhou Jiangsu 225101,China)

机构地区：[1]江海职业技术学院,江苏扬州225101

出　　处：《浙江交通职业技术学院学报》2024年第1期25-32,共8页Journal of Zhejiang Institute of Communications

摘　　要：为了进一步增强碱激发材料的力学性能,掌握碱激发材料的凝结规律,通过掺入不同种类与掺量硅酸钠进行增硅改性,增强矿渣碱激发材料反应活性,定期观测试件的力学性能并分析凝结规律,同时结合微观分析手段深入剖析硅酸钠的增硅增强机理。结果表明,固态与液态硅酸钠均能够显著提高试件的抗压强度,明显缩短初凝与终凝时间。随固态硅酸钠掺量的提升,试件抗压强度呈先上升后下降趋势,固态硅酸钠在试件内大量结晶是导致抗压强度下降的主要原因。随液态硅酸钠掺量的提升,试件抗压强度呈先显著上升后趋于平稳的趋势,这说明其增强作用具有最大限值,液态硅酸钠的激发效果明显优于固态。In order to further enhance the mechanical properties of alkali activated materials and master the condensation law,the reactivity of slag alkali activated materials was enhanced through the improvement of different kinds and proportions of sodium silicate.The mechanical properties of the samples were observed regularly and the condensation law was further analyzed.The results show that both solid and liquid sodium silicate can significantly improve the compressive strength and shorten the initial and final setting time.With the increase of solid sodium silicate content,the compressive strength at first increases and then decreases.The large amount of crystallization of solid sodium silicate in the sample is the main reason for the decrease of compressive strength.With the increase of liquid sodium silicate content,the compressive strength of the specimen increases significantly at first and then tends to be stable,which shows that its reinforcement has the maximum limit.The excitation effect of liquid sodium silicate is better than that of solid.

关 键 词：碱激发 硅酸钠 矿渣 抗压强度 初凝 终凝 

分 类 号：TU525.9[建筑科学—建筑技术科学]