High Alumina Cement ( CA-50-A600, A700, A900) Aluminate cement is produced by preparing raw meal consisting of applicable bauxite and limestone, calcining the raw meal in rotary klin and grinding the clinker, which contains Al2O350-59% . It was called bauxite cement for a time and also called " refractory cement" based on its main usage. The name " aluminate cement" is specified by the national standard now. Items Unit Index Test standard CA-50-A600 CA-50-A700 CA-50-A900 Chemical composition Al2O3 % > = 50.00 > = 50.00 > = 50.00 GB/ T205-2000 CaO % > = 33.00 > = 33.00 > = 33.00 SiO2 % = 10.00 Compressive Strength 1 day Mpa > = 40.00 > = 50.00 > = 70.00 3 day Mpa > = 50.00 > = 60.00 > = 80.00 Refractories > = 1350 > = 1350 > = 1400