Expansive Agents
CaO Expansive Agent
Fast early expansion · dry-shrinkage compensation · good strength
Expansive Agents
Sulfoaluminate Expansive Agent
- Sulfoaluminate
- Long-term shrinkage compensation
- 25 kg woven bag
- Volume discount
A sulfoaluminate-based expansive agent with stable expansion and low later shrinkage, the first choice for underground waterproofing and post-cast strip concrete.
Stable expansion · low later shrinkage · waterproofing
- Form
- Powder
- Recommended dosage
- 8%–12% of cementitious material
Overview
A sulfoaluminate expansive agent that forms ettringite with cement hydrates to produce controlled expansion, compensating shrinkage and reducing cracking.
Key benefits
- Stable expansion, low later shrinkage
- Markedly reduces cracking risk
- Enhances self-waterproofing of structures
Specifications
Specifications
| Appearance | Grey-white powder |
| Specific surface | ≥ 250 m²/kg |
| Restrained expansion | 0.02%–0.06% |
| Chloride | ≤ 0.05% |
| Alkali | ≤ 0.75% |
Standards
Documents & data sheets
TDS, COA and MSDS are issued with every batch. Click a document and tell us the grade — we reply within 24 hours.
Application scenarios
- Underground waterproofing
- Post-cast strips
- Shrinkage-compensating concrete
- Mass structures
Product Q&A
Recommended dosage?
8%–12% of cementitious material, based on restrained-expansion tests.
Curing requirements?
Requires thorough moist curing; inadequate curing weakens compensation.
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