Lightweight gypsum plaster is known for its high application speed and excellent coverage. But quick drying and cracking remain the two most frustrating issues for formulators. The surface skins over too fast, leaving no time for finishing. Soon after hardening, hairline cracks appear, failing the quality inspection. Many people instinctively think about adjusting the retarder
When many developers do wall plastering, in order to avoid the problem of hollowing and cracking in the later stage. Gypsum mortar is usually used for wall leveling. Before plastering gypsum mortar, the key step is to use an elastic waterproof interface agent. So, what effect does the interface agent have on the effect of
Types and application areas of gypsum-based mortar 1. Ordinary gypsum mortar Ordinary gypsum mortar is a slurry composed of gypsum powder, water reducing agent and a certain proportion of water. It has the characteristics of rapid drying, good ductility and convenient construction. It is suitable for indoor walls, ceilings, art decoration and other fields. 2.
Different effects of HPMC, starch ether and RDP on gypsum mortar Hydroxypropyl methylcellulose (HPMC) 1. It is stable to acids and alkalis, and its aqueous solution is very stable in the range of pH=2~12. Caustic soda and lime water do not have much impact on its performance. But alkali can speed up its dissolution. And
4. Water retaining agent Gypsum dry-mix building materials are inseparable from water-retaining agents. To improve the water retention rate of gypsum product slurry is to ensure that water can exist in gypsum slurry for a long time. In this way, a good hydration hardening effect is obtained. Improve the constructability of gypsum powder building materials,
A single admixture has limitations in improving the performance of gypsum slurry. If you want to achieve satisfactory performance of gypsum mortar and meet different application requirements. Chemical admixtures, admixtures, fillers and multiple materials are required to complement each other. Scientifically and reasonably compounded. 1. Coagulation regulator Coagulation regulators mainly divide into retarders and accelerators.
