Gres porcellanato a bassissimo contenuto di cemento

Description of Ultra Low Cement Castable

Ultra low cement refractory castables are high-performance refractory materials developed on the basis of low cement refractory castables. The amount of aluminate cement is generally 2.5%~5%, and its performance is better than that of low cement refractory castables.

Ultra low cement refractory castables have significantly reduced cement content, combined with special binders and high-quality aggregates, and have the characteristics of low porosity, high strength, and good thermal shock resistance. They are ideal for various high-temperature industrial applications.

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Kerui Ultra Low Cement Castable Technical Data Sheet

Item		Gres porcellanato a bassissimo contenuto di cemento
Material		Clay	High Alumina	Corundum
Bulk Density (g/cm3)		2.35	2.7	3.2
Al2o3(%)		45	75	95
Cao(%)		1.15	1.15	1.15
Flexural Strength(Mpa)	110℃*16h	6	6	8
	1500℃*3h	8	8	10
Compressive Strength(Mpa)	110℃*16h	40	40	60
	1500℃*3h	70	800	90
Line change rate after burning(%)	110℃*16h	-0.1	0	0
	1500℃*3h	-0.5	-0.5	-0.5
Refractoriness	℃	1710	1790	1790
Safe Service Temperature	℃	1400	1450	1650

Advantages of Ultra Low Cement Castable

1.Low cement content, which cuts down heat shrinkage; 2.High strength for better durability; 3.Low porosity to resist penetration; 4.Excellent thermal shock resistance for harsh high – temp use.

Construction Methods of Ultra Low Cement Castable

Surface Treatment

Make sure the surface of the construction is clean, dry, smooth, and free from other pollutants

Mixing Castables

Mix multiple bags of castables according to the materials needed, and add a certain amount of water to adjust the humidity to meet the humidity requirements of construction

Stirring

Add the mixed castable and adhesive into the mixer, add water, and mix until the color is uniform, and the lumps can be caught by hand without leakage (completed within 30 minutes)

Vibration

The castable should also be poured with a plug-in vibrator or a flat vibrator, and the layer pouring height should not exceed 400mm. Castables applied by vibrating can help eliminate porosity and improve the compactness and strength of the lining.

Curing

The completed construction body should be naturally cured in a dry environment for 5-7 days at a temperature of 5-35℃. Avoid construction body vibration during maintenance.

Application of Ultra Low Cement Castable

1.In the steel – making industry, they line the inner walls of ladles, protecting them from the high – temperature molten steel and slag erosion. 2.In glass – melting furnaces, they endure the extreme heat and chemical corrosion during glass production. 3.In cement rotary kilns, they help maintain the kiln’s structural integrity under long – term high – temperature and mechanical stress conditions.