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Fire Clay Refractory Castable

Refractory castable is an unshaped material delivered in the state of dry powder, and mixed before use, can harden at the ambient temperature to achieve adobe strength after construction without heating.Light weight refractory castable composed of refractory lightweight aggregate, powder, binder and admixture and other components. The product has characteristics of small volume, high compressive strength, good acid and acid gas corrosion resistance, good insulation performance, low water absorption.


Its construction is simple, is the best construction product for the high temperature alkali resistant parts. Good workability, strong cohesion, initial setting time and construction can be a long time, fast strength growth, strong impermeability, no acidification, easy to ensure that the masonry plaster full and dense, can significantly improve the chimney liner air tightness, integrity and anti-corrosion ability. It is an ideal cementing material for high chimneys, high temperature flue and duct lining. It can also be used in acid tank and other acid resistant parts in petroleum, chemical, nonferrous metallurgy and so on.

Application of Clay Insulation Castable

Metallurgical industry
Petroleum, chemical industry, building materials, electric power
Engineering industry furnace and thermal equipment

Detailed Fire Clay Insulation Castable Description

Item Unit L-45 L-50 L-60 L-65 L-75 L-80 L-85 L-90
Al2O3 % 45 50 60 65 75 80 85 95
Fe2O3 % 2 2.5 2.5 2.3 2.5 2.0 1.8 1.2
Bulk Density(dried at 110℃) g/cm3 2.2 2.2 2.3 2.35 2.5 2.6 2.7 3.0
Service Temp 1400 1450 1500 1550 1600 1650 1700 1750
Cold Crushing Strength 110℃ Mpa 45 47 50 50 65 70 90 95
1100℃ Mpa 40 42 45 45 55 60 80 85
1500℃ Mpa 65 68 80 85 100 110
Modulus of Rupture 110℃ Mpa 7 7 8 8 10 11 12 13
1100℃ Mpa 6 6 7 7 9 9 10 12
1500℃ Mpa 9 9 11 12 13 15
Max Grain Size mm 6 6 6 6 6 6 6 6
Water(Typical) % 11-13 11-13 9-11 9-11 9-11 7-9 6-8 6-7
Application Guidelines P-preferred, R-Rodding,V-Vibration, T-Tamping
Mixer p P P P P P P P p
Placement R/V/T R/V/T R/V/T R/V/T R/V/T R/V/T R/V/T R/V/T R/V/T
Water/Mixer Temp 20±5 20±5 20±5 20±5 20±5 20±5 20±5 20±5 20±5
Mixing 2/5 2/5 2/5 2/5 2/5 2/5 2/5 2/5 2/5

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