Application Specification of Hydroxyethyl Cellulose in Self-Leveling Mortar

Hydroxyethyl Cellulose (HEC) is a non-ionic water-soluble cellulose ether widely used in self-leveling mortar to enhance its flowability and construction performance. This article briefly outlines the role, application specifications, and benefits of HEC in self-leveling mortar.

Role of HEC

1. Water Retention: Slows water evaporation, ensuring sufficient cement hydration and preventing cracking.

2. Rheology: Improves mortar flowability, reduces segregation and bleeding, and ensures uniform spreading.

3. Anti-Sagging: Increases viscosity, preventing mortar sagging and maintaining construction shape.

4. Adhesion: Enhances bonding strength between mortar and substrate, reducing hollowing.

Application Specifications

1. Dosage: HEC dosage is 0.1%-0.5% of cementitious materials, adjusted based on formulation and environment.

2. Mixing: Blend HEC with dry materials before adding water and stir to avoid clumping.

3. Water-Cement Ratio: Strictly control water-cement ratio to ensure strength and flowability.

4. Environment: Work in suitable temperature and humidity, avoiding extreme heat or dryness.

5. Substrate Preparation: Ensure substrate is clean and dry; grind or apply primer if necessary.

6. Construction: Use tools like scrapers to spread mortar evenly and eliminate air bubbles.

7. Curing: Keep surface moist post-construction, curing for at least 7 days.

Benefits

• Enhances construction efficiency, reducing manual leveling efforts.

• Improves water retention, adhesion, and durability of mortar.

• Minimizes cracking and hollowing, ensuring project quality.

• Eco-friendly, aligning with sustainable development goals.

Conclusion

HEC significantly improves the performance and application of self-leveling mortar. By adhering to proper specifications, HEC ensures mortar quality, providing reliable support for flooring projects.