Brushing the wall is good with lime or gypsum powder?
Light weight, good fire resistance, good sound insulation effect. Construction gypsum has a strong moisture absorption (poor frost resistance and water resistance), only in a dry environment.Combined with water, the rate of hardening is rapid, and the final finish can be reached in 30min, and in the process of hardening, the plaster products are exquisite and smooth in appearance due to volume expansion.
Lime powder is made from limestone powder get burned by lump lime reacts with water, and water is not crystalline; gypsum powder is made of gypsum ore by crushing frying (dehydration) powder obtained, add appropriate amount of water after re crystallization. These two things are different in nature and use, and can not be analog.
Hygroscopic water and strong (in the water will go with combustible viscous) don't mix (hydration heat caused by explosion) is generally used for the manufacture of cement lime mortar and concrete configuration, configuration, such as ground material. Lime in the process of hardening will release a lot of water, causing volume shrinkage, resulting in cracking, so it can not be used alone, we must add filler materials.
