Good sintering time and steady quality cement 42.5

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Good sintering time and steady quality cement 42.5  

 

Introduction of  cement 42.5

  

High alumina cement or Fused calcium aluminate is produced by burning the raw materials of high grade crude aluminous bauxite and limestone in arc-furnace kiln. Calcium aluminate clinker is mainly used in refining ladle to remove the sulfide impurities from steel liquid and keeping good fluidity of slag. 

 

Features of cement 42.5

 

1. High refractoriness
2. Good resistance to abrasion
3. Good anti-corrosion performance
4. High thermal shock stability

 

Application of cement 42.5     

 

 

Because of their relatively high cost, calcium aluminate cements are used in a number of restricted applications:
1) in construction concretes, rapid strength development is achieved, even at low temperatures.

 

2) in construction concretes, high chemical resistance is possible.
3) in refractory concretes, strength is maintained at high temperatures.
4) as a component in blended cement formulations, various properties such as ultra-rapid strength development and controlled expansion can be obtained.

 

 Physical and chemical properties 

 

	CA50-G6	CA50-G7	CA50-G9-Sintered	CA50-Fused
Chemical Analysis
Al2O3	≥50	≥50	≥51	≥50
CaO	≥33	≥33	≥33.5	≤38
SiO2	≤8.0	≤8.0	≤6.5	≤6.0
Fe2O3	≤2.5	≤2.5	≤2.5	≤2.5
Na2O+K2O	≤0.4	≤0.4	≤0.4	≤0.4
Physical Properties
Initial Set Time (Min)	≥30	≥30	≥30	≥120
Final Set Time (Min)	≤360	≤360	≤360	≤480
Specific Surface Area(m2/kg)	≥300	≥300	≥400	≥400
Flexural Strength
1 Day (MPa)	≥6.0	≥6.5	≥8.0	≥10.0
3 Days (MPa)	≥7.0	≥7.5	≥10.0	≥11.0
Compressive Strength
1 Day (MPa)	≥45	≥50	≥70	≥75
3 Days (MPa)	≥55	≥60	≥80	≥80

 

 

 

Product picture

 

 

 

 

Testing Equipment

 

 

 

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