Calcium Aluminate Cement (cac), Its Use and Preparation

Simple SummaryContent extracted from patent full text and abstract with AI.

The invention relates to a specialized calcium aluminate cement (CAC) with a high proportion of the CA2 phase (over 70%) and a controlled amount of CA, offering improved setting, hydration, and shrinkage behavior compared to conventional CACs. This cement shows slower and more predictable shrinkage during curing, continuous strength development over time, and is especially beneficial for processes where precise timing and controlled strength are required, such as in pre-cast concrete applications with inner moulds. The cement can be prepared using standard raw materials and process adjustments and is particularly low in iron and other impurities, enhancing its suitability for specialized uses.

Use CasesContent extracted from patent full text and abstract with AI.

• Pre-cast refractory shape production, particularly where controlled shrinkage and strength are critical (e.g., steel industry, well blocks, EAF delta sections, nozzles, seating blocks).
• Ceramic filter production for industrial applications.
• Additive manufacturing and 3D printing, especially for complex ceramic or refractory components.
• Building chemistry applications, especially where compatibility with sulfates or other aggressive chemicals is needed.
• Manufacture of catalyst carriers due to controlled porosity and phase purity.
• Applications requiring high purity, low-iron cementitious binders, where impurities could negatively impact performance.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables more predictable and flexible scheduling for pre-cast manufacturing by expanding the safe demoulding window due to slower, controlled shrinkage.
• Reduces risk of internal stresses, clamping, and cracking during hydration, improving yield and quality of pre-cast shapes.
• Continuous and higher final strength development—parts gain strength steadily, ultimately outperforming standard cements after longer curing.
• High purity and low levels of iron, silicon, and alkalis make it suitable for advanced and specialty applications, minimizing contamination risks.
• Compatible with conventional additives, recipes, and processes, allowing easy adoption in existing manufacturing systems.
• Supports the production of complex shapes and components in fields like 3D printing and catalyst manufacturing due to controlled particle size and phase composition.
• Improved workability and handling of cementitious materials, with better control over setting times using standard additive packages.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The present invention concerns a calcium aluminate cement, containing more than 70 wt.-% CA2 and at least 3 wt.-% CA, based on the total amount of calcium aluminate phases present in the cement. It also concerns a method of preparing the same and the use of the CAC, in particular in pre-cast shape production, ceramic filter production, additive manufacturing, 3D printing, building chemistry, in particular in connection with sulfates, or catalyst carrier production.