Refractory Cement CA80

Description

Refractory Cement CA80 is a high-purity product. CA80 contains about 80% alumina. The special properties of CA80 endow high-performance concrete with the following properties, high refractoriness and excellent mechanical properties.

Therefore, it can be used in conventional castables and low-cement castables that require fast setting, high early strength, and good medium-temperature strength in the refractory industry. The very high purity of CA80 makes it suitable for certain refractory applications. For example: low silica and low iron oxide are critical in reducing atmospheres where hydrogen or carbon monoxide is present.

Features

Good working performance.
Mechanical Strength Properties.
Excellent castable.
Ideal for high temperature environments.

Specification

Products	CA75	CA75	CA80	CA80	CA80S	CA80S
Workable time	Moderate	Moderate	Short	Short	Longer	Longer
Standard	Usual range	Specification limit	Usual range	Specification limit	Usual range	Specification limit
SiO2 (%)	0.1-0.4	≤0.5	0.1-0.4	≤0.5	0.1-0.4	≤0.5
Al2O3 (%)	73.5-75.5	≥73	78.0-80.0	≥77	78.0-80.0	≥77
Fe2O3 (%)	0.1-0.4	≤0.5	0.1-0.4	≤0.5	0.1-0.4	≤0.5
CaO (%)	21.0-23.0	–	18.5-20.5	–	18.5-20.5	–
R2O (%)	–	≤0.4	–	≤0.4	–	≤0.4
S- (%)	–	≤0.1	–	≤0.1	–	≤0.1
CI- (%)	–	≤0.06	–	≤0.06	–	≤0.06
d50(μm)	6-9	≤10	5-8	≤9	5-8	≤9
325M (%)	–	≤5.0	–	≤5.0	–	≤5.0
Specific surface areas(㎡/kg)	420-480	≥400	450-500	≥450	450-500	≥450
Setting time (min)
Initial setting time IS	150-200	≥150	150-210	≥30	210-270	≥180
Final setting time FS	240-300	≤360	210-270	≤300	260-320	≤360
Flexural strength, Mpa
1d	6.5-8.5	≥4.0	6.0-8.0	≥4.0	5.5-7.5	≥4.0
3d	8.5-10.5	≥5.0	7.0-9.0	≥5.0	7.0-9.0	≥5.0
Compressive strength, Mpa
1d	42-52	≥25	40-50	≥25	35-45	≥25
3d	52-62	≥30	50-60	≥30	50-60	≥30