Expansive Agents
Composite Expansive Agent
Balanced early/mid expansion · fits various cements · versatile
Expansive Agents
CaO Expansive Agent
- CaO
- Fast early expansion
- 25 kg woven bag
- Volume discount
A CaO-based expansive agent with fast early expansion, suited to projects with large early drying shrinkage, with good strength development.
Fast early expansion · dry-shrinkage compensation · good strength
- Form
- Powder
- Recommended dosage
- 6%–10% of cementitious material
Overview
A CaO-based expansive agent that hydrates to Ca(OH)₂ producing fast early expansion to compensate early drying shrinkage.
Key benefits
- Fast early expansion
- Compensates early dry shrinkage
- Good strength development
Specifications
Specifications
| Appearance | Grey-white powder |
| Available CaO | ≥ 60% |
| Restrained expansion | 0.03%–0.08% |
| Chloride | ≤ 0.05% |
| Alkali | ≤ 0.80% |
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
- Dry environments
- Shrinkage-compensating concrete
- Underground structures
- Mass concrete
Product Q&A
Difference from sulfoaluminate?
CaO expands faster early, good for high dry shrinkage; sulfoaluminate is more stable long-term.
Dosage?
6%–10% of cementitious material.
Related products
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Sulfoaluminate Expansive Agent
Stable expansion · low later shrinkage · waterproofing
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Cost-effective · mild water-reducing · general compounding