以不同的激发剂对粉煤灰-电石渣-钛石膏体系进行活性激发，研究了激发剂对体系强度和凝结时间的影响。通过分析体系中物相组成和微观形貌的变化，探明了不同激发剂的作用机理。结果表明：激发剂的加入可以有效缩短体系的凝结时间、提高试样的强度，其中以氢氧化钠为激发剂时各龄期抗压效果最好，28 d抗压强度可达10.4 MPa。X射线衍射（XRD）、扫描电镜-能谱（SEM-EDS）分析表明，复合胶凝材料的水化产物主要为C-（A）-S-H凝胶和钙矾石，激发剂的种类对水化产物的生成有较大的影响。氢氧化钙体系钙矾石数量最多；氢氧化钠体系以凝胶为主，钙矾石含量低；氢氧化钾体系，由于钾石膏的生成，前期钙矾石生成量较少，后期数量上升。以氢氧化钠为激发剂时，体系中较高的碱度和游离硫酸根的快速消耗促进了铁参与反应，生成Ca₄Fe₂SO₁₀·16H₂O（Fe-AFm），有利于原状钛石膏的直接利用。

Different activators were used to activate fly ash?calcium carbide slag?titanium gypsum system，and the effect of activator on the strength and setting time of the system was studied.By analyzing the phase composition and microscopic morphology of the system，the hydration mechanism of different activators was proved.The results showed that the addition of activator could effectively shorten the setting time of the system and improve the strength of the sample.Among them，NaOH as activator had the best compressive strength at each age，which could reach 10.4 MPa at 28 d.X-ray diffraction（XRD），scanning electron microscope energy dispersive spectrum（SEM-EDS） analysis showed that the hydration products were mainly C-（A）-S-H gel and ettringite，and the type of activator had great influence on the formation of hydration products.The amount of ettringite in Ca（OH）₂ system was the largest.NaOH system was mainly gel with low ettringite content.Due to the formation of syngenite in KOH system，the amount of ettringite was small in early stage and increased in late stage.When NaOH was used as the activator，the high basicity and the fast consumption of free SO₄^2- promoted the participation of Fe in the reaction to form Ca₄Fe₂SO₁₀·16H₂O（Fe-AFM），which was conducive to the direct utilization of the original titanium gypsum.