CEMENT

Calucem exports Calcium Aluminate Cements to more than 60 countries worldwide. The positive sales trends and capacity utilization of the facility in Croatia have helped reinforce its position as the second largest manufacturer and supplier of Calcium Aluminate Cement.

Calucem was founded on July 1, 2006, when Heidelberger Calcium Aluminates was taken over by Mid Europa Partners (MEP) with the support of the management team.

Calucem offers products and services in the quality that our customers expect from us. And with our strong commitment to the development of new and innovative products, we are investing in our future.

ISTRA 40

ISTRA 40 is a normal setting, rapid hardening Calcium Aluminate Cement (CAC) with high early strength. It differs substantially from the usual calcium silicate cements (Portland cements) in its manufacturing process, chemical composition and rapid strength gain.

ISTRA 45

ISTRA 45 is a fused Calcium Aluminate Cement (CAC) typically used in refractory applications where service temperatures do not exceed 1350°C. It also may be used in a variety of applications in construction, corrosion resistance and other industries.

ISTRA 50

ISTRA 50 is a normal setting, rapid hardening Calcium Aluminate Cement (CAC) with high early strength. It differs substantially from the usual calcium silicate cements (Portland cements) in its manufacturing process, chemical composition and rapid strength gain.

LUMNITE MG®

LUMNITE MG® is a fused, low purity Calcium Aluminate Cement (CAC) designed to contribute special properties in materials for the building chemistry, construction, and related applications.

LUMNITE®

LUMNITE® is a fused, low purity Calcium Aluminate Cement (CAC) typically used in refractory applications where service temperatures do not exceed 1350°C (2500°F). It also may be used in a variety of applications in construction, corrosion resistance and other industries.

LUMNITE MG4®

LUMNITE MG4® is a fused, low purity Calcium Aluminate Cement (CAC) designed to contribute special properties in materials for the building chemistry, corrosion resistance, and related applications. It can be used as a stand-alone cement, or as a component in specialized hydraulic binder systems. LUMNITE MG4® is optimized to respond especially well to a wide variety of additives and admixtures.

HiPerCem®

HiPerCem® is Calucem’s new Calcium Aluminate Cement (CAC) binder system developed for use in highly sophisticated building chemistry formulations. HiPerCem® is a very reactive, white Calcium Aluminate Cement that combines the high content of the reactive Monocalciumaluminate (CA) phase with an optimized particle size distribution and specific surface area. It does not contain any additives.

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ISTRA 40

Features
ISTRA 40 is composed of calcium aluminates with the following characteristics:

 

  • high early strength

  • refractoriness

  • high abrasion resistance

  • resistance to biogenic sulphuric acid corrosion(BSAC)

 

ISTRA 40 meets the requirements of EN 14647 for Calcium Aluminate Cements and is controlled in accordance with EN 14647.

 

ISTRA 40 has a shelf-life of approx. six (6) months when stored under dry conditions.

Production

ISTRA 40 is produced by melting selected raw materials (bauxite and limestone) in special kilns. After cooling, the clinker is ground using ball mills.

Quality

Like all other Calucem products, the production of ISTRA 40 is subject to stringent quality control. Constant monitoring of all components ensure a consistent quality. The production plant is certified according to EN ISO 9001 – certificate number CH99/0297 and the Environmental Management System EN ISO 14001 – certificate number CH02/0862.

Technical data

The following information represents typical values for the quality control carried out in our plant.

 

 

Mineralogical composition:

ISTRA 40 contains mainly monocalcium aluminate (CA). This mineral phase is responsible for the high early strength. When mixed with water ISTRA 40 forms calcium aluminate hydrates as its hydration products.

Mineral phases of ISTRA 40:

Chemical composition (%):

Cement technical properties:

Setting time and water demand:

The testing of the setting time is performed using the mortar in order to describe the behaviour of the ISTRA 40 in mixtures with a workable consistency. A mixture containing CEN-standard sand and using a water/cement ratio of 0.4 is produced for testing the mortar on the basis of EN 14647.

 

Mortar:

Development of strength

After setting, strength develops very rapidly. ISTRA 40 is a cement with very high early strength and high compressive strength. After one (1) day, the compressive strength is higher than that of high grade Portland cements CEM I 52.5 R after 28 days.

The tests are conducted with mortar prisms 4 x 4 x 16 cm produced according to DIN EN 14647 containing CEN-standard sand and and using a water/cement ratio of 0.4.
Resistance to corrosion

High resistance to waste waters in combination with extraordinary abrasion resistance and high resistance to biogenic sulphuric acid corrosion (BSAC) makes ISTRA 40 an ideal product for sewer systems and waste water plants. When ISTRA 40 is mixed with water, the hydration products of calcium aluminate are formed. They are extremely resistant to aggressive, slightly acid waters (pH factor > 3) including water soluble sulphates.

Refractoriness

After drying out, mortars and concretes made from ISTRA 40 slowly emit their hydrate water without destroying the matrix. At high temperatures (> 1000 °C), ceramic bonding occurs between the high alumina cement parts and the refractory aggregates. These ceramic bonds make ISTRA 40 an excellent binder in refractory concretes and other refractory mortars or gunning mixes.

Safety instructions

The normal safety measures for cement must be followed. You will find further information in our safety data sheet.

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ISTRA 45

Features

ISTRA 45 is composed of calcium aluminate phases which have the following characteristics:

 

  • High early strength
  • Refractoriness
  • High abrasion resistance
  • Resistance to biogenic sulfuric acid corrosion

 

ISTRA 45 has a shelf life of approximately six months if stored in a dry environment.

Production

ISTRA 45 is produced by melting selected raw materials (bauxite and limestone) in special kilns. After cooling, the clinker is ground using ball mills.

Quality

Like all other Calucem products, the production of ISTRA 45 is subject to stringent quality control. Constant monitoring of all components ensure a consistent quality. The production plant is certified according to EN ISO 9001 – certificate number CH99/0297 and the Environmental Management System EN ISO 14001 – certificate number CH02/0862.

Technical data

The following information represents typical ranges for the chemical and physical properties of ISTRA 45 produced at our plant.

 

 

Mineralogical composition:

ISTRA 45 contains mainly monocalcium aluminate (CA). This mineral phase is responsible for the high early strength. 

 

When mixed with water, ISTRA 45 forms calcium aluminate hydrates as its hydration products.

Mineral phases of ISTRA 45:

Chemical composition (%):

Physical properties:

Setting time and water demand:

The testing of the setting time is performed using the mortar in order to describe the behaviour of the ISTRA 45 in mixtures with a workable consistency. A mixture containing CEN-standard sand and using a water/cement ratio of 0.40 is produced for testing the mortar on the basis of EN 14647.

 

Mortar:

Development of strength

Once setting has begun, strength develops very rapidly. After one day, the compressive strength is typically higher than Type I Portland cements after 28 days.

Resistance to corrosion

High resistance against waste waters in combina-tion with extraordinary abrasion resistance and high resistance against biogenic sulfuric acid corrosion (BSAC) makes ISTRA 45 an ideal product for sewer systems and waste water plants. When ISTRA 45 is mixed with water, the hydration products of calcium aluminate cement are formed. They are extremely resistant against aggressive, slightly acid waters (pH factor > 3) including water soluble sulfates.

Refractoriness

ISTRA 45 can be used in mild to moderate refrac-tory applications, such as artificial fireplace logs and hearths, where temperatures do not exceed 1350 °C. ISTRA 45 can be used in gunning mixes, as well as castables. It can be used as a stand-alone cement, or as part of a more complex hydraulic system.

Safety instructions

Please refer to our Material Safety Data Sheets for complete information. In general, CALUCEM calcium aluminate cements are not known to contain hazardous or toxic materials

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