STD2010 Modified cellulose ether for cementitious use
Category：Paint chemicals
Introduction
It has good water retention, which reduces the entry of moisture from the mortar into the substrate, as well as good slip resistance.
Introduction
STD2010 is a specially engineered cellulose ether designed to enhance the performance of cement-based construction materials. This high-performance additive improves workability, water retention, and adhesion while maintaining optimal mechanical properties in various cementitious systems. The following tables provide comprehensive technical information about this advanced construction chemical.
Fundamental Physical & Chemical Properties
| Property | Specification Range | Test Method |
|---|---|---|
| Appearance | White to off-white powder | Visual inspection |
| Moisture content | ≤4.5% | ASTM D7191 |
| Bulk density | 0.35-0.55 g/cm³ | ISO 697 |
| pH (1% solution) | 6.0-8.5 | ASTM E70 |
| Particle size | 80% ≤100μm | Laser diffraction |
| Ash content | ≤5.0% | ISO 2144 |
Rheological Properties (2% aqueous solution at 20°C)
| Parameter | Typical Value | Measurement Method |
|---|---|---|
| Brookfield viscosity | 30.000-50.000 mPa·s | LV spindle, 20 rpm |
| Gelation temperature | >75°C | Hot water bath method |
| Hydration time | <10 minutes | Visual assessment |
| Pseudoplasticity index | 0.40-0.50 | Rheometer measurement |
| Water retention | ≥95% | Filter paper method |
Performance Advantages in Cementitious Systems
| Performance Aspect | Improvement Effect | Benefit |
|---|---|---|
| Workability | 30-40% increase | Easier application |
| Water retention | 95-98% retention | Reduced cracking |
| Open time | 20-30% extension | Better workability |
| Adhesion strength | 15-25% improvement | Stronger bond |
| Shrinkage reduction | 20-35% decrease | Fewer cracks |
Recommended Dosage Guidelines
| Application | Dosage Range (% by cement weight) | Key Benefit |
|---|---|---|
| Tile adhesives | 0.2-0.6% | Improved adhesion |
| Self-leveling compounds | 0.05-0.3% | Better flowability |
| Cement renders | 0.15-0.5% | Enhanced workability |
| Repair mortars | 0.2-0.8% | Reduced shrinkage |
| EIFS base coats | 0.3-0.7% | Improved crack resistance |
Compatibility with Common Cement Additives
| Additive Type | Compatibility Level | Recommended Usage |
|---|---|---|
| PCE superplasticizers | Excellent | Can be used together |
| Redispersible powders | Very good | Enhances flexibility |
| Air-entraining agents | Good | No negative effect |
| Retarders | Good | May require adjustment |
| Accelerators | Fair | Dosage optimization needed |
Conclusion
STD2010 modified cellulose ether represents an advanced solution for cementitious applications, offering superior water retention, workability enhancement, and improved mechanical properties. Its balanced rheological characteristics and excellent compatibility with other additives make it particularly valuable for high-performance construction materials. The product’s consistent quality and reliable performance ensure optimal results in various cement-based formulations.
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