Is cellulose ether a key additive to improve mortar performance?

As a polymer material prepared by modifying natural cellulose, cellulose ether has been verified by more than 30 years of global engineering practice in the field of building mortar and is an internationally recognized high-efficiency functional additive. Its core role is reflected in three dimensions:

1. Dual engines for performance optimization

Super strong water retention

By forming a three-dimensional network structure to lock in moisture, ensure that the cement is fully hydrated (water retention rate can reach more than 95%), even in a high temperature and low humidity environment (35℃/30%RH), it can still maintain at least 2 hours of effective operation time and significantly improve compressive strength (28-day strength increased by 15-25%).

Intelligent rheological adjustment

The unique thixotropy makes the mortar "smooth during construction and stable after standing": HPMC products can be precisely controlled within the viscosity range of 20,000-100,000cps to achieve zero sag in vertical surface construction while maintaining an excellent scraping feel.

2. Engineering value upgrade system

• Anti-slip performance: enables tile adhesive to bear an instant load of 2kg/m²

• Open time: extended to 20-40 minutes (ordinary mortar only 5-15 minutes)

• Anti-cracking performance: shrinkage rate is reduced by 30-50%, effectively preventing hollowing and cracking

• Environmental protection indicators: meet international environmental protection standards such as EN 12004 and GB 18582

3. Scientific application system

Selection guide

The mainstream product HPMC (hydroxypropyl methylcellulose) is preferred due to its wide temperature adaptability (5-40℃) and strong pH stability (3-11). HEMC (hydroxyethyl methylcellulose) is more suitable for low temperature environments, and HEC (hydroxyethyl cellulose) is mostly used for special mortars.

Application specifications

• Dosage control: 0.2-0.7% (adjusted according to the type of mortar)

• Premixing process: fully mechanically mix with dry materials such as cement/sand

• Quality verification: ISO 9001 certified companies have more reliable products