Mechanism of Action of NR30 Concrete Superplasticizer
The mechanism of this superplasticizer from ZORLU Chemical is based on polycarboxylate ether (PCE) technology.
When PCE is added to a concrete or cement mortar mix, its molecules form layered coatings around cement particles, completely covering them. This action causes the cement particles in the concrete or mortar mix to become separated from each other.
The side chains of the PCE cause particle repulsion, while the hydrophobic force in the main chain attracts large molecules to the cement particles. This process arranges water molecules away from the cement particles, increasing fluidity in the mix. Over time, the charges in the concrete mix undergo reverse induction, leading to an increase in slump and workability, and initiating cement hydration.
To check the quality of this type of polycarboxylate superplasticizer:
- Color control: If the product appears dark brown, it likely contains materials other than pure PCE and will no longer have true polycarboxylate properties.
- Viscosity test: When touched with your fingers, a high-quality product should have an oil-like, uniform texture with no sediment.
Dosage of NR30 Superplasticizer
The standard consumption of NR30 is 0.4% to 1.1% of the cement weight in the concrete.
This range is determined based on precise site tests, weather conditions, and the materials used.
Exceeding the normal dosage is not allowed. If necessary, consult ZORLU Chemical experts. Overuse can cause delayed setting, which is especially pronounced when used with sulfate‑resistant cement.
Properties and Effects of NR30 Superplasticizer
- Maintains concrete workability for up to 30 minutes (depending on dosage and initial slump)
- Prevents bleeding and segregation of aggregates
- Suitable for thin, densely reinforced formwork
- Increases slump and workability
- Reduces water content
- Lowers required cement dosage
- Enhances compressive strength
- Improves concrete cohesion
- Improves pumpability
- Allows compaction without vibration
Applications of NR30 Superplasticizer
- Slipform and prestressed concrete
- Reinforced and non‑reinforced concrete under normal conditions
- High‑strength concrete
- Mass concrete placement
- Structural concrete such as bridges
- Pumpable concrete
- Pre‑stressed and post‑tensioned concrete
- Sections with high rebar density
Safety and Handling
- Use goggles, gloves, and a mask to prevent direct contact or inhalation
- Avoid eye contact. If it occurs, flush immediately with plenty of water
- If skin irritation or allergic reactions occur, seek medical attention
- Keep out of reach of children and pets
Storage Conditions
- Shelf life: 1 year in original packaging
- Avoid exposure to freezing, high heat, or prolonged direct sunlight
- Store in a cool, moderate environment (+10°C to +30°C)
Packaging
- 20‑liter jerrycan
- 220‑liter drum
- 1000‑liter IBC tank
Standards
- ASTM C494
- ASTM C1017/C1071M
- ISIRI 2930
