The advanges of HPMC & MHEC in dry mix mortar products
November 22nd 2024
Redispersible polymer powder (RDP) is a water-soluble polymer that can be redispersed in water to form a latex emulsion. RDP is a versatile additive that can be used in a variety of construction applications, including mortar adhesive.
Benefits of using RDP in mortar adhesive:
Improved adhesion: RDP enhances the adhesion of mortar to a variety of substrates, including concrete, brick, block, and tile. This is because RDP forms a strong bond with both the substrate and the cement in the mortar.
Increased flexibility: RDP makes mortar more flexible, which helps to reduce cracking and spalling.
Improved water resistance: RDP makes mortar more water resistant, which helps to protect it from moisture damage.
Extended workability: RDP extends the workability of mortar, which gives the installer more time to mix and apply the mortar.
Types of RDP:
There are two main types of RDP:
VAE (vinyl acetate ethylene) RDP: This is the most common type of RDP. It is a copolymer of vinyl acetate and ethylene. VAE RDP is known for its good adhesion, flexibility, and water resistance.
EVA (ethylene vinyl acetate) RDP: This type of RDP is less common than VAE RDP. It is a copolymer of ethylene and vinyl acetate. EVA RDP is known for its high flexibility and water resistance.
How to use RDP in mortar adhesive:
RDP is typically added to mortar adhesive at a rate of 1-2% by weight of the cement. The RDP should be added to the dry mortar mix before mixing with water.
Here are some tips for using RDP in mortar adhesive:
Use a high-quality RDP from a reputable supplier.
Follow the manufacturer’s instructions for mixing and application.
Do not add too much RDP, as this can make the mortar too sticky.
Store RDP in a cool, dry place.
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