基于XRD与FTIR的碱钢渣胶凝材料复合激发机理研究

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

以Na_2SiO_3、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Na_2SiO_3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4.50g、Na2SiO_3用量为11.25g和Ca(OH)_2用量为6.75g时,碱钢渣胶凝材料的力学性能最优。Na_2SiO_3对碱钢渣胶凝材料的7d抗压强度影响显著,NaOH对碱钢渣胶凝材料的3d抗压强度影响显著,Ca(OH)2对碱钢渣胶凝材料的28d抗压强度影响显著。Na_2SiO_3,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。

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 dcompressive strength of alkali steel slag cementations materials,NaOH has significant effect on 3 dcompressive strength of alkali steel slag cementations materials,Ca（OH）2 has significant effect on 28 dcompressive 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.