The lightweight castable with low bulk density is made of aluminate cement, high alumina fine material, ceramsite, and additives. The product has the characteristics of low bulk density, small thermal conductivity, good thermal insulation effect, high compressive strength, acid and acid gas corrosion resistance, heat insulation, thermal insulation, and low water absorption, and simple in construction. It is the most ideal product for the construction of alkali corrosion resistance parts at high temperature. Good workability, strong adhesion, long initial setting time and construction operation time, fast strength growth, strong impermeability, no need for acidulate treatment, easy to ensure the compactness and fullness of masonry mortar joints, which can reduce the thermal energy consumption of industrial kilns, and can also reduce the weight of furnace lining. The lightweight castable can be used for the thermal insulation layer of high-temperature industrial furnace and equipment also used for the lining of various high-temperature gas pipe.
| INDEX / PRODUCT | RBTLW-30 | RBTLW-35 | RBTLW-40 | RBTLW-55 | RBTLW-75 | ||
| Working limit temperature | 1100 | 1200 | 1400 | 1500 | 1600 | ||
| Bulk Density(g/cm3) ≥ | 1.15 | 1.25 | 1.35 | 1.40 | 1.50 | ||
| Modulus of Rupture(MPa) ≥ | 110℃×24h | 2.5 | 3 | 3.3 | 3.5 | 3.0 | |
| 1100℃×3h | 2 | 2 | 2.5 | 3.5 | 3.0 | ||
| 1400℃×3h | ― | ― | 3 | 10.8 | 8.1 | ||
| Cold Crushing Strength(MPa) ≥ | 110℃×24h | 8 | 8 | 11 | 12 | 10 | |
| 1100℃×3h | 4 | 4 | 5 | 11 | 10 | ||
| 1400℃×3h | ― | ― | 15 | 22 | 14 | ||
| Permanent Linear Change(%) | 1100℃×3h | -0.651000℃×3h | -0.8 | -0.25 | -0.15 | -0.1 | |
| 1400℃×3h | ― | ― | -0.8 | -0.55 | -0.45 | ||
| Thermal Conductivity(W/m.k) | 350℃ | 0.18 | 0.20 | 0.30 | 0.48 | 0.52 | |
| 700℃ | 0.25 | 0.25 | 0.45 | 0.61 | 0.64 | ||
| Al2O3(%) ≥ | 33 | 35 | 45 | 55 | 65 | ||
| Fe2O3(%) ≤ | 3.5 | 3.0 | 2.5 | 2.0 | 2.0 | ||