Bridge Deck Expansive Agent Waterproofing Concrete Additive for Infrastructure

• Customization: Available
• Grade Standard: Industrial Grade
• Transport Package: 25kg/Bag
• Model NO.: EX-3
• Specification: bag
• Trademark: JUFU
• Origin: China
• Production Capacity: 50000mt/Year

Product Description

Product Description:

A high-performance calcium sulfoaluminate (CSA)-based expansive agent designed to compensate for drying shrinkage and thermal contraction in cementitious materials. It generates controlled expansion during hydration, enhancing concrete durability by preventing cracks in critical structures. Ideal for projects requiring dimensional stability and watertightness.

 

Specifications

 

Parameter	Value
Main Composition	Calcium Sulfoaluminate (CSA), Anhydrite
Expansion Rate (7d)	0.02%-0.10% (adjustable)
Setting Time	Initial: 30-60 min, Final: ≤4 hrs
Alkali Content	≤0.5% (Low-alkali formula)
Particle Size	80-120 μm (Fine Powder)
Packaging	25 kg/bag or 1 ton/jumbo bag

 

Application

 

1. Concrete Structures

• Waterproofing: Basements, reservoirs, swimming pools.

• Infrastructure: Bridges, tunnels, high-speed rail tracks.

• Repair: Crack injection grouts, patch mortars.
   

2. Precast & Prestressed Concrete

• Pipes/Panels: Prevents shrinkage cracks during steam curing.

• Post-Tensioning Ducts: Ensures full grout expansion.
   

3. Special Environments

• Sulfate-Rich Areas: Marine structures, sewage plants.

• Low-Temperature: Accelerates setting in cold weather.

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  Usage Guidelines

   

  Dosage Recommendation:

• General Concrete: 8-12% of cement weight.

• Restrained Structures (e.g., slabs): 10-15%.

• Grouts/Mortars: 6-10%.
   

  Mixing Method:

• Dry Mixing: Blend with cement & aggregates first.

• Water Addition: Adjust w/c ratio by ±5% for workability.

• Curing: Standard moist curing (≥7 days).
   

  Compatibility:

• Cements: Works with OPC, slag cement, fly ash blends.

• Admixtures: Avoid clash with CaCl2-based accelerators.

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Package and storage

 

• Packaging:

  • 25 kg multi-layer kraft paper bags (moisture-proof).

  • 1-ton jumbo bags.
     

• Storage:

  • Keep dry (<50% humidity) at 5-30°C.

  • Shelf life: 12 months (unopened).

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  Our Advantages

   

  -- Early Expansion: 70% expansion within 3 days.
  -- Low Corrosion: Chloride-free, safe for rebar.
  -- Compatibility: Works with Portland cement, fly ash, slag.