铁相组分对硫铝酸钡钙水泥的影响

以纯化学试剂配料，经 X 射线衍射仪（XRD）、扫描电子显微镜（SEM）和强度测试，研究铁相 C6A2F、C4AF、C6AF2和 C2F 对硫铝酸钡钙水泥熟料的煅烧及性能的影响。结果表明：各生料配比试件在 1 350oС 时，熟料矿物形成较好；随铁相中Al 与 Fe 的摩尔比的减小，熟料外观颜色呈浅绿色→ 深绿色→ 黑绿色变化；熟料矿物主要生成菱形十二面体的硫铝酸钡钙和卵粒状的硅酸二钙；铁相能够促进 Ba2 +取代 Ca2 +；主要水化产物为水化硫铝酸钡钙、BaSO4和水化铝酸钙。铁相组分为 C4AF时，其 1 d 和 3 d 抗压强度分别为 73. 2 MPa 和 97. 9 MPa。

Influence of Iron Phase Composition on Barium Calcium Sulphoaluminate Cement

The influence of iron phase composition of barium calcium sulphoaluminate cement is studied using pure chemical reagents as raw materials by XRD,SEM and strength testing methods.Results show that these raw materials have a fine mineral formation at 1 350 ℃.From macroscopic view of these clinker minerals,they change from pale green to dark green gradually with the ratio of Al to Fe decreasing.From the microstructure of clinker minerals,these clinker minerals mainly generate a mass of rhombic dodecahedron of C2.75Ba1.25A3S-and round granular of dicalcium silicate.Iron phase can promote Ba2+ to replace Ca2+.The hydration products are mainly hydrated barium calcium aluminum sulfur,BaSO4 and hydration calcium aluminates.When iron phase composition is C4AF,the strength can reach up to 73.2 MPa and 97.9 MPa at 1 d and 3 d curing ages.