基于XRD与FTIR的碱钢渣胶凝材料复合激发机理研究

以Na₂SiO₃、NaOH和Ca(OH)₂制备碱溶液，然后利用碱溶液对钢渣进行活化处理。分别研究Na₂SiO₃用量、NaOH用量和Ca(OH)₂用量对碱钢渣胶凝材料的力学性能影响，获得最优力学性能的碱钢渣胶凝材料。采用XRD，FTIR和SEM对最优力学性能的碱钢渣胶凝材料进行表征。结果表明，当NaOH用量为4.50 g、Na₂SiO₃用量为11.25 g和Ca(OH)₂用量为6.75 g时，碱钢渣胶凝材料的力学性能最优。Na₂SiO₃对碱钢渣胶凝材料的7 d抗压强度影响显著，NaOH对碱钢渣胶凝材料的3 d抗压强度影响显著，Ca(OH)₂对碱钢渣胶凝材料的28 d抗压强度影响显著。Na₂SiO₃，NaOH和Ca(OH)₂碱性物质的加入促使钢渣形成稳定的C-S-H凝胶与沸石类相。

Study on Composite Activating Mechanism of Alkali Steel Slag Cementations Materials by XRD and FTIR

With Na₂SiO₃, NaOH and Ca(OH)₂ preparation of alkali solution, then steel slag was activated using alkali solution. The effects of Na₂SiO₃ amount, NaOH amount and Ca(OH)₂ amount on the mechanical property of the alkali steel slag cementations materials were studied in order to obtain optimal mechanical properties of alkali steel slag cementations materials. The optimal mechanical properties of alkali steel slag cementations materials were characterized by XRD, FTIR and SEM. The results show that When Na₂SiO₃ amount is 11.25 g, NaOH amount is 4.50 g and Ca(OH)₂ amount is 6.75 g, alkali steel slag cementations materials’ the mechanical property is the best. Na₂SiO₃ has significant effect on 7 d compressive strength of alkali steel slag cementations materials, NaOH has significant effect on 3 d compressive strength of alkali steel slag cementations materials, Ca(OH)₂ has significant effect on 28 d compressive strength of alkali steel slag cementations materials. The addition of alkali solution, such as Na₂SiO₃，NaOH and Ca(OH)₂ causes steel slag to form stable C-S-H gel and zeolite.