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Additives for dry building mixes

Posted on March 24, 2021 by Marvin Douglas

Modifying additives are always used in the production of dry building mixtures. Modifying additives for dry mixes are inorganic materials that improve the specified technological and technical properties of gypsum, cement dry mixes. Modifiers are used to increase plasticity, frost resistance, the ability to retain water, increase the setting time, and accelerate the hardening time of the mixture. The additives are used in the production of putties, plasters, grouts, tile adhesives, masonry mortars, adhesives for drywall, foam concrete, mixtures for self-leveling floors, as well as repair and waterproofing compounds. This is an obligatory component of a modifying cement-sand dry mixture of three components: a binder (cement), a filler (sand, lime, gypsum) and chemical additives (thickeners, accelerators, retarders, water repellents, plasticizers, steam generators).

Types of polymer and chemical modifying additives

Plasticizers

They are used in most dry mixes and serve to reduce their water demand. These additives are in demand when it is necessary to obtain a mixture of high mobility without losing the strength of the product after solidification. The compositions are used for the manufacture of self-leveling floors, injection mixtures, waterproofing and repair materials.

Water-retaining additives

These components are used in almost all formulations. Typically, they are cellulose derivatives or modified starches. In injection molding mixtures, such additives help to avoid stratification and the appearance of “cement milk”. In plastering compounds, they prevent slipping from vertical structures.

RPP (dispersible polymer powders)

They are dried latex of various polymers. These polymer additives in dry building mixtures act as an adhesive or a binder. Provide an increase in the adhesion of the solution to the base. The negative side of the application is a slight decrease in the strength characteristics of the final product.

Polymer fiber

Serves as a bending strength enhancer of the drymix mortar additives Malaysia, that is, to increase the resistance to cracking. Not suitable for highly mobile compositions.

Dry building mixtures are currently produced at the factory, which gives a guarantee of the quality of building materials. Modern materials are easy to work with, form high-quality, durable coatings and have a variety of properties, which is why their field of application in construction and decoration is so wide. For more articles like this one, click here.

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