Powdered Limestone for Concrete Use
- Can replace up to 20% of the required cement in low water cement concretes without significant strength loss
- Provides alternate filler material to fly ash
- Can be used in conjunction with fly ash or slag
- Increases strength due to the "particle packing effect"
- Consistent chemistry and color
- Contains no free lime to cause efflorescence
- Limestone particles provide nucleation sites for hydration products
- Increased early strengths
- Improved workability
- Lubricates aggregates allowing addition of more aggregates
- Wider particle size distribution
- Manufactured to exacting sizing and chemistry specifications
- Water demand is unaffected or slightly reduced
- Reduces greenhouse gas emissions by reducing cement usage
- Safer handling due to reduced silica, asbestos, and heavy metal concerns
- Reduces drying shrinkage
- Decreased permeability
- Good segregation resistance, flow ability, and passing ability in self-compacting concretes
- Low unit cost
- Consistent supply of limestone powder for 20 years in California
- Loading facilities for gravity and pneumatic trucks