为研究硅酸盐骨料在胶凝材料中的化学反应能力，通过正交试验分析玄武岩碱熔的最佳参数，采用X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FTIR)分析玄武岩的碱熔产物，并研究碱熔过程及其参数对玄武岩中玻璃体及活性氧化铝含量的影响。试验结果表明：碱熔能有效提升玄武岩反应活性，使玄武岩中玻璃体质量分数由 5.60%提高至 45.32%，活性氧化铝质量分数由 3.73%提高至 12.33%；NaOH 掺量是影响碱熔效果的最主要因素，碱熔玄武岩活性随NaOH掺量的增加而升高；玄武岩活性的提升与碱熔期间Si—O—Si和 Al—O—Si 键断裂及[SiO4 ]- 和[AlO4 ]- 单体的形成有关。
To determine the reaction ability of silicate aggregate in cementitious material，the optimum parameters of alkali-fusion of basalt were obtained by the orthogonal experiment. XRD and FTIR analysis were conducted to analyze the basalt of alkali fusion products，and the effect of the process and parameters of alkali fusion on the activated alumina content of basalt vitreous was researched. The results showed that the alkali fusion process could effectively improve the reactivity of basalt. The reactive phase content increased from 5.60% to 45.32%，and the content of reactive aluminum increased from 3.73% to 12.33% at most；The content of NaOH was a significant factor affecting the effect of alkali fusion；The activity of alkali fusion basalt increased with the increase of NaOH content. Chemical analysis for basalt activity improvement was related to the fracture of Si—O—Si and Al—O— Si bonds and the formation of[SiO4 ]- and[AlO4 ]- monomers during alkali fusion.