Expansion Agent:

Enpansion Agents mainly includes Calcium Sulfoaluminate (CSA) Type, Calcium Oxide (CaO) Type, Magnesium Oxide (MgO) Type, and Composite Type. They supply early-age expansion, mid-late age expansion or full-age expansion for cementicious mortars and concretes. Different chemical composition, hydration mechanisms, and expansion stages satisfy divers application scenarios.

Plastic Expansion Agents

🌱 Core Advantages

• Supply Plastic Stage Expansion:
  Under alkaline conditions, slowly reacts with water to release nitrogen/acetylene-based mixed gases, forming uniformly distributed fine bubbles that compensate for plastic shrinkage during setting. Early-stage expansion (starts within 15 minutes of mixing) persists for 24 hours, ensuring full shrinkage compensation.
• Shrinkage Compensation:
  Addresses early-volume loss (within 3–24 hours) to prevent settlement cracks and improve compactness .
• Wide Compatibility & Safety:
  Non-corrosive to steel reinforcement and compatible with standard mixing processes (dry-mix first, then water addition).
• Low Dosage, High Efficiency:
  Minimal addition levels achieve dense, uniform bubble structures .
• Eco-Friendly & Cost effectiveness:
  Non-toxic, odorless, and free of harmful substances . Enhances end-product quality without significant cost increases.

🧱 Key Applications

1. Grouting materials and pressure grouts requiring plastic-stage expansion .

2. Mortars for crack repair and gap filling .

3. Precast concrete components and  mortars needing anti-settlement performance .

CSA Expansion Agents

🌱 Core Advantages

• Dual-Stage Expansion: 
  Reacts with water and calcium hydroxide to form ettringite (needle-shaped crystals), generating controlled expansion during both early hydration and hardening stages. Avoids delayed expansion cracking with stable, predictable volume growth .
• Shrinkage Compensation: 
  Counteracts autogenous, drying, and temperature-induced shrinkage in high-strength/concrete (HSC/UHSC) .
• Durability Enhancement:
  Improves impermeability (up to grade S30), freeze-thaw resistance (D150), and sulfate corrosion resistance. Maintains or increases compressive/flexural strength (28-day compressive strength ≥45 MPa) .
• Structural Reinforcement:
  Creates internal pre-stress (0.2–0.7 MPa) in reinforced concrete (0.2–1.0% reinforcement ratio) to enhance crack resistance.
• Versatile Compatibility:
  Works with ordinary Portland cement, mineral admixtures, and superplasticizers .
• Chloride-Free:
  Safe for steel reinforcement with no corrosion risk (chloride ion content ≤0.05%) .

🧱 Key Applications

1. Structural self-waterproofing concrete (basements, tunnels, water tanks) .

2. Overlength cast-in-place structures (reduces post-cast strip spacing) .

3. Large-volume concrete (mitigates temperature cracks) .

4. Rigid roof slabs and non-shrink grouts .

5. Precast and prestressed concrete components .

Available Grade

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