SAP admixture delivers internal curing water to reduce shrinkage and enhance durability in high-performance concrete.
Summary Benefits at a Glance:
Shrinkage Reduction – Controls autogenous shrinkage and prevents cracking
Durability – Improves frost resistance and long-term performance
Strength Retention – Maintains compressive and flexural strength comparable to reference concrete
Easy Application – Simple dosing at 0.02–0.03% of cement weight
Product Introduction
Super Absorbent Polymer (SAP) is an internal curing agent for high-performance concrete. By absorbing 30–50 times its weight in water and gradually releasing it, SAP ensures sufficient hydration of cement particles, reducing autogenous shrinkage and preventing cracks. It enhances frost resistance and durability in dry, windy or hot environments where external curing is insufficient. SAP is recommended for HPC in bridges, tunnels, wind power foundations and precast elements.
Product Parameters
| Property | Specification |
|---|---|
| Appearance | White granules |
| Water absorption (distilled) | 30–50 times |
| Particle size | 50–100 mesh |
| Water absorption time | ≤ 3 minutes |
| Alkali content | ≤ 0.06% |
| Chloride ion content | ≤ 0.06% |
| Initial setting time | ≥ –90 min |
| Final setting time | ≤ +120 min |
| Compressive strength 3 d | ≥ 80% of reference |
| Compressive strength 28 d | ≥ 90% of reference |
| 12 h shrinkage ratio | ≥ 60% |
| 28 d shrinkage ratio | ≥ 80% |
| 28 d crack resistance | No cracking |
| Freeze–thaw durability (300 cycles) | Pass, mass loss 0.057 g/cm² < limit 0.15 g/cm² |
Product Usage
Dosage: 0.02–0.03% of cement weight (approx. 380–400 g per m³ concrete).
Mix with concrete during batching, ensuring even dispersion.
Adjust mixing water accordingly to balance SAP absorption.
Suitable for HPC exposed to dry, windy, or freezing conditions.
Ensure trial mix to optimize performance for project-specific requirements.
Product Documentation
Super Absorbent Polymer (SAP) – Internal Curing Agent for Concrete
Internal curing admixture to reduce shrinkage and improve durability.
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Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
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