Concrete Plasticizer LR200 – Technical Overview

Mechanism of Action

The performance of LR200 is based on polycarboxylate ether (PCE) technology.

When PCE is added to a concrete or cement mortar mix, its molecules arrange themselves in a layered manner around cement particles, coating them completely. This process causes the particles to repel and separate from each other within the mixture.

The side chains of the PCE molecules further enhance this repulsion effect, dispersing the cement particles. This spacing rearranges the water molecules so they are positioned away from cement surfaces, resulting in a more fluid and workable concrete mix.

Over time, the charges created during mixing are neutralized through reverse induction, leading to increased slump and flow and initiating the hydration process.

Quality Control Tips:

• Color Check: A dark brown color may indicate the presence of materials other than pure PCE, reducing its superplasticizing effect.
• Viscosity Check: A high-quality product should have an oil-like consistency, uniform texture, and be free from sediment.

Dosage

• Standard usage: 0.7% – 1.2% of the cement weight in the mix.
• The exact dosage should be determined based on site trials, weather conditions, and material type.
• Overdosing is not allowed — it may cause delayed setting, especially with sulfate-resistant cements.
• For any adjustments beyond the recommended range, consult the Zorlu Concrete Chemicals technical team.

Properties & Benefits

• Prevents bleeding and aggregate segregation.
• Suitable for thin formworks and densely reinforced sections.
• Improves slump and flowability.
• Functions as a water-reducing agent.
• Reduces cement content requirements.
• Enhances compressive strength.
• Enables concrete pumping.
• Improves cohesion.

Applications

• Prestressed and post-tensioned concrete.
• Casting in normal climate conditions.
• Concreting in sections with dense reinforcement.
• Projects requiring reduced water for lower permeability.
• All structural element placements.
• Pumpable concrete production.
• Manufacturing of concrete bricks and blocks.
• Concrete with crushed aggregate.

Safety Precautions

• Wear safety glasses, gloves, and a mask to prevent direct contact and inhalation.
• If contact with eyes occurs, rinse immediately with plenty of water.
• Seek medical advice if skin irritation develops.
• Keep away from children and pets.
• Store in a safe location following the storage guidelines below.

Storage Guidelines

• Shelf life: Minimum 1 year in the original sealed container.
• Environment: Avoid frost, excessive heat, and direct sunlight. Store in a cool, moderate location.
• Temperature range: +10°C to +30°C.

Packaging Options

• 20 L jerry can.
• 220 L drum.
• 1000 L IBC tank.

Standards Compliance

• ASTM C494
• ASTM C1017/C1071M
• ISIRI 2930