кислоты и термостойкость плитка кирпич

Data sheet of the products ItemSpecificationTest methodPhysical propertyRefractoriness ≥1710GB/T7322-87Bulk density g/cm3≥2.1GB/T2997-82Aparant porosity %≤20GB/T2997-82Cold crushing strength MPa≥30GB/T5072-85Refractoriness under load Ta ≥1420YB/T370-75Acid resistance %≥98GB8488-87Permanent linear change1300×3h≤+0.1GB/T5988-86Chemical propertyAl2O3 %≥35GB6900-86SiO2 %≥58GB6900-86 ItemSTANDARD valueZ-1Z-2Z-3Z-4Water absorbsion (A) % 0.2≤A<0.50.5≤A<2.02.0≤A<4.04.0≤A<5.0Bending strength MPa ≥58.8≥39.2≥29.4≥19.6Acid resistance %≥99.8≥99.8≥99.8≥99.7Thermal shock resistance100C100C130C150CAfter one test, the sample should be free from crack and scale.