New Building Material Gypsum Mortar—Hydroxypropyl Methyl Cellulose

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New Building Material Gypsum Mortar—Hydroxypropyl Methyl Cellulose

building mortar
The use of mortar as a thermal insulation material in building construction can improve the thermal insulation performance of the external wall thermal insulation layer, reduce indoor heat loss, and avoid uneven heating between rooms, so it has been widely used in building construction.

High-quality gypsum mortar requires reasonable material coordination. Let’s take a look at the original synthesis of gypsum mortar.

The role of gypsum mortar raw materials:

Chemical gypsum: Chemical gypsum is an important part of mortar. We can also call it industrial re-production gypsum. It is mainly composed of calcium sulfate waste residue, so it is very convenient to make and can realize resource reuse. In fact, chemical gypsum is a kind of engineering waste, and it has become an important chemical raw material through the development of scientific researchers to turn waste into treasure. Another point is that the production process of building gypsum cannot be the same as the production of natural gypsum, and a special drying process should be adopted to reduce its water content. It is formed through calcination at a certain temperature by screening it. Only in this way can it meet the national certification standards and meet the requirements of thermal insulation construction.

Vitrified microbead light aggregate: The most important component of gypsum mortar is vitrified microbeads, which are commonly used thermal insulation materials in modern building construction and have good thermal insulation properties. It is mainly made of an acidic glass material through high-tech processing. In the application and construction, the vitrified microbead aggregate has a very smooth texture and has the advantages of high temperature resistance, wear resistance and good heat insulation.

gypsum mortar

Gypsum mortar additives:

1. Redispersible latex powder: Redispersible latex powder is a powdery thermoplastic resin obtained by spray drying and subsequent processing of polymer emulsion. The main purpose is to improve the cohesion, flexibility and adhesion of the mortar to the substrate. The adhesion of the polymer is more dependent on the adsorption and diffusion of macromolecules on the bonding surface. The surface of the base material is close to the surface of the mortar, thereby improving the adsorption between them, and the bonding performance is significantly improved.

2. Lignin fiber: Lignin fiber is a natural material that absorbs water and does not dissolve in water. Its function lies in its own flexibility and the three-dimensional network structure formed after mixing with other materials, which can effectively reduce the drying shrinkage of the mortar during the drying process of the mortar, thereby improving the crack resistance of the mortar. Adding wood fiber to the mortar can improve construction performance. Qingquan Cellulose reminds everyone to choose short and medium length of lignin fiber.

3. Water-retaining thickener: In order to improve the workability of mortar and improve water-retention, fluidity and sag resistance, cellulose ether is usually added. The use of hydroxyethyl cellulose ether can better play the role of water retention and thickening, especially in summer construction.

4. Composite retarder: According to the construction requirements of gypsum products, the operation time is an important indicator of its performance, and the main measure to prolong the operation time is to add retarder. Commonly used gypsum retarders are alkaline phosphate, citrate, tartrate and so on.

5. Filler: The use of heavy calcium carbonate (heavy calcium) can change the workability of the mortar and reduce the cost.

Only good raw materials can be made into high-quality gypsum mortar. Gypsum mortar is a new type of wall plastering material. I hope we can better promote the development of the construction industry.

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