以磷渣（PS）为主要原料，配合矿渣（BFS）和氢氧化钙（LM）制备磷渣基胶凝材料。在m（PS）：m（BFS）：m（LM）=70：20：4的条件下，采用正交实验研究复合化学激发剂（CA）复合配比对磷渣基胶凝材料力学性能的影响，同时采用XRD、SEM/EDS和TG/DTG等手段分析材料的物相组成及微观形貌。正交实验结果表明，CA对材料力学性能影响的强弱顺序为：水玻璃 > Na₂SO₄ > NaCl > NaOH，最佳质量分数配比为0.15% NaOH、0.2% NaCl、0.5% Na₂SO₄、0.3%水玻璃；该配比下材料抗压强度达最大值为66.9 MPa，与未添加CA的空白样相比强度增长50%以上。XRD、SEM/EDS和TG/DTG分析表明，磷渣基胶凝材料主要水化产物为C-S-H和C-A-S-H，添加CA可提高体系水化反应程度及增加C-S-H和C-A-S-H生成量，进而提高材料强度。

Combining with blast furnace slag (BFS) and calcium hydroxide (LM),phosphorous slag (PS) are utilized as raw material to prepare phosphorus slag-based cementitious materials.Meanwhile,the effect of the ratio of compound chemical activator (CA) on the mechanical properties of phosphorus slag-based cementitious materials is studied by orthogonal experiment under the mass ratio of PS:BFS:LM=70:20:4.Moreover,the microstructures and phase compositions of the materials are determined by XRD,SEM/EDS and TG/DTG.The orthogonal experimental results show that sodium silicate in CA has the biggest effect on the mechanical properties of the materials,followed by Na₂SO₄,NaCl and NaOH,and the optimal mass fractions of NaOH,NaCl,Na₂SO₄,and sodium silicate are 0.15%,0.2%,0.5% and 0.3%.The materials with these optimal fractions can have a maximum compressive strength of 66.9 MPa,which enhances more than 50% compared with the materials without CA.XRD,SEM/EDS and TG/DTG analyses show that the main hydration products of phosphorus slag-based cementitious materials are C-S-H and C-A-S-H,and the addition of CA can increase the degree of hydration reaction and the yielding amount of C-S-H and C-A-S-H,therefore lifting its own compressive strength.

张建辉(1992-),男,硕士研究生,研究方向为固体废物资源化利用和危险固体废物安全化处理,1054473137@qq.com