EnglishPolish

GÓRKAL 40

Description

GÓRKAL 40 is a hydraulic binder for refractory and building applications, manufactured and controlled in accordance with the PN-EN 14647 standard. It features fast strength development and a short setting time. It is resistant to sulphate aggression (sea water) and a carbon monoxide atmosphere. It can be applied at negative temperatures (e.g. -10 °C).

Documentation

GÓRKAL 40

Advantages

  • Fast strength development and short setting time – enables urgent repair works and accelerates construction cycles.
  • High strength and density – increases the durability of structures, resistance to mechanical loads and abrasion.
  • Heat and fire resistance – serviceability at temperatures up to 1300 °C, ideal for lining furnaces, fireplaces, chimneys, and ventilation ducts.
  • Resistance to aggressive environments – high corrosion resistance, resistant to sulphates, chlorides, sea water, and carbon monoxide.
  • Applicability at negative temperatures (down to -10 °C) without heating – saves time and energy.
  • Versatility – suitable for building chemistry, refractory castables, shaped products, and repair compounds.

Technical Specifications

ParameterValue
Chemical composition (typical values)Al₂O₃ > 41%, CaO > 35.5%, SiO₂ < 4%, Fe₂O₃ ≤ 16%
Principal mineralogical phaseCA
Secondary phasesC₄AF, C₁₂A₇, C₂AS
Specific surface (Blaine)3100–3800 cm²/g
Refractoriness≥ 128 sP (Seger cone)
Density3.0 g/cm³
Bulk density1.1 g/cm³
Initial setting timeInitial setting time
Final setting time< 480 minutes
Cold crushing strength after 6 h> 30 MPa
Cold crushing strength after 24 h> 50 MPa
Shelf life in dry conditionsup to 12 months

Note: characteristics determined in accordance with EN-196. Exact values may vary within specification limits.

Applications

  • Refractory concretes and shaped products, lining of furnaces, fireplaces, chimneys, ventilation ducts.
  • Building mortars, screeds, window sills, lintels, repair compounds.
  • Building chemistry: dry mixes, monolithic floors.
  • Structures in contact with aggressive media (sea water, sulphates, chlorides).
  • Works at negative temperatures without additional heating.

Packaging

GÓRKAL 40 aluminous cement is packed in multi-layer 25/50 kg bags or 1 t big bags, providing protection against moisture. Exact weight and packaging type to be confirmed upon order.

FAQ

Yes, the cement can be applied down to -10 °C without the need for heating. It releases sufficient heat during hardening to ensure strength development.

Compressive strength exceeds 30 MPa after 6 hours and is over 50 MPa after 24 hours, allowing rapid commissioning of structures.

When stored in dry conditions, the shelf life is up to 12 months. Avoid contact with moisture.

It is versatile: from urgent household repairs (screeds, window sills) to critical refractory linings of furnaces, fireplaces, and chimneys, as well as chemically resistant structures.