Calcium Aluminate Cements

Calcium Aluminate Cements, available with both 70% and 80% alumina content, are very white, high purity hydraulic bonding agents providing controlled setting times and strength development for today's high performance refractory products.

Calcium Aluminate Cement Applications

Almatis' calcium aluminate cements are for use in refractories designed for service up to 1800°C (3300°F):

  • Vibration and self-flowing castable mixes
  • Quick-setting mortar, joining mixtures, self-leveling floors, and compensation compounds
  • Refractory castables for:
    • Iron and steel industry
    • Nonferrous metals industry
    • Petrochemicals industry
  • Dry and wet mixes for dry gunning or shot-creting (wet gunning)

Benefits of Almatis Calcium Aluminate Cement

  • Very low mixing-water requirement
  • Very high purity: SiO2 ‹ 0.3% and Fe2O3 ‹ 0.2%
  • High product consistency
  • High cold and sintered strength
  • Very tight specifications of setting times
  • Customized setting control with Almatis dispersing aluminas
  • High degree of whiteness

Why Almatis Calcium Aluminate Cements are Premium

  • Very high purity, high whiteness bonding agents
  • Full product range of 70% and 80% alumina cements
  • Secure supply in Asia, Europe and Americas
  • Global product specifications deliver the same product around the globe
  • Unmatched global technical support offering consulting, troubleshooting and application assessment to optimize refractory performance
  • Short lead times available in all world regions

Almatis Calcium Aluminate Cements

Almatis 70% alumina cements provide the superior performance required by today's conventional and low moisture refractory concretes and mortars, with high consistency in casting properties and final product performance.

ProductDescription
CA-14 W General purpose "Winter" version with faster setting properties; high purity calcium aluminate cement most often used in low moisture, low cement and ultra low cement castable refractories
CA-14 M General purpose "Moderate" version with median setting properties; high purity calcium aluminate cement most often used in low moisture, low cement and ultra low cement castable refractories
CA-14 S General purpose "Summer" version with slow setting properties; high purity calcium aluminate cement most often used in low moisture, low cement and ultra low cement castable refractories
CA-270 Calcium aluminate cement with very low water demand, excellent flow properties and high strength

Almatis 80% alumina cements are for applications where rapid setting, high early strength development and good strength at intermediate temperatures are required.

ProductDescription
CA-25 R General purpose, high purity calcium aluminate cement used for rapid setting mixes or for setting acceleration
CA-25 M General purpose, high purity calcium aluminate cement used for moderate setting mixes or for moderate acceleration
CA-25 C High purity calcium aluminate cement with extended casting life and excellent surface finish of cast surfaces

Alphabond Binders

Almatis hydratable alumina binders Alphabond 300 is for use in high temperature monolithic refractories where strength, resistance to slag attack and other factors make the use of calcium aluminate cement binders less desirable.

Alphabond Applications

Calcia-free Almatis Alphabond 300 is for use in high alumina castables either with or without silica fume, e.g. Spinel forming castables. Alphabond 300 is free of additives and is often used for precast shape production. Almatis´ Dispersing Aluminas ADS-1, ADS-3, and ADW-1 may be used in varying concentrations to control set time and water demand. For silica fume contents higher than 1% in the formulation, Almatis Dispersing Aluminas M-ADS 1 and M-ADW 1 are recommended. Alphabond bonded castables shall be dried with care due to a more narrow temperature range for de-watering compared to cement bonding.

Benefits of Alphabond

  • High purity CaO-free hydratable binder
  • Low water demand
  • Reliable setting behavior
  • Improved slag resistance
  • Increased refractoriness especially in silica fume containing mixes vs. cement bonding

Why Almatis Alphabond is Premium

  • Unique binder products for superior refractories
  • Hydratable alumina binder enabling no-cement castables
  • Calcia-free binder avoids the formation of low melting point silicates in the matrix
  • Global product specifications deliver the same product around the globe

Almatis Alphabond 300

Almatis hydratable alumina Alphabond is an engineered binder for use in no-cement refractory castable formulations, specifically for applications where the chemistry of the refractory matrix is critical to product performance.

ProductDescription
Alphabond 300 Additive free hydratable alumina binder