Chromium Oxide Green (Cr₂O₃) serves as an additive and pigment in the cement industry, improving the performance of cement-based materials and imparting decorative effects.

1. Applications in Cement

1.1 As Pigment

Chromium oxide green provides stable green color for cement products:

• Colored concrete: Landscape pavements, plazas, sidewalks
• Decorative mortar: Exterior wall decoration, artistic walls
• Precast components: Colored cement boards, tiles
• Terrazzo: Floor decoration, countertops

1.2 Functional Applications

Besides coloring, chromium oxide green also has functional roles:

• UV shielding: Protects concrete internal structure
• Weather resistance enhancement: Enhances anti-weathering ability
• Antimicrobial properties: Inhibits surface microbial growth

2. Technical Requirements

2.1 Physical Properties

• Particle size: 1-5μm (matches cement particles)
• Specific surface area: 5-15 m²/g
• Bulk density: 0.8-1.2 g/cm³
• Moisture content: <1%

2.2 Chemical Properties

• Cr₂O₃≥98%
• Alkali resistance: Excellent (cement pH>12)
• Acid resistance: Good
• No soluble salts (to avoid efflorescence)

3. Addition Methods

3.1 Dry Mixing

Dry mix chromium oxide green with cement, aggregates:

1. Weigh chromium oxide green according to formula (generally 1-5%)
2. Mix with cement, sand, stone, and other dry materials
3. Mix for 3-5 minutes to ensure uniformity
4. Add water and mix into concrete or mortar

3.2 Dosage Reference

• Light color: 0.5-1% (of cement weight)
• Medium color: 1-3%
• Dark color: 3-5%

4. Application Advantages

4.1 Color Stability

• Excellent alkali resistance, does not react with cement
• UV resistant, no fading outdoors
• Consistent color between batches

4.2 Mechanical Properties

• Does not affect concrete strength
• Bonds well with cement matrix
• Does not reduce durability

5. Product Specifications

• CRC-98: Cr₂O₃≥98%, Cement product grade
• CRC-99: Cr₂O₃≥99%, High-end decorative concrete
• Weather-resistant: Passes 1000-hour accelerated aging test

Contact us for cement application technical support and color matching service.