Plâtre à base de gypse

Seasonal changes in temperature and humidity affect the setting speed, moisture evaporation, and final strength of gypsum. For example, in hot, dry summer weather, the material sets too quickly, leaving little time for application, while in cold, damp winter weather, the hardening time is delayed. By adding the appropriate amount of retarder or accelerator, you can effectively adjust the application performance in different climates, maintaining the consistency and reliability of the formula.

This issue is typically related to insufficient water retention, excessive application thickness, or high absorbency of the substrate. Inadequate water-retaining additives can cause rapid moisture loss, disrupting hydration reactions and leading to early cracking or surface powdering. We recommend using HPMC with appropriate viscosity, combined with an appropriate amount of polymer powder to enhance flexibility and adhesion, effectively reducing these issues.

Sprayed gypsum requires higher rheological and sag resistance properties. Ordinary formulations tend to slide or flow back on vertical surfaces. Using starch ether additives can optimize the material's thixotropy and sag resistance, ensuring smooth application while reducing the likelihood of spray gun blockages and improving construction efficiency.

Setting time control requires consideration of both the work environment and worker habits. Protein-based or amino acid-based retarders can be added to extend open time, ensuring sufficient application time; accelerators can be added when rapid turnover is required. We can provide customized additive combinations to meet your production schedule requirements.