Application of redispersible Polymer powder (RDP) in self-leveling floors

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Redispersible Polymer Powder (RDP)?is a powder material obtained by spray drying polymer emulsion. It has high performance and a wide range of applications. Especially in the construction of self-leveling floors, RDP, as a key additive, can significantly improve the physical properties and construction performance of the floor, and enhance the durability, strength and crack resistance of self-leveling floors. Therefore, the application of RDP in self-leveling floors has attracted increasing attention.

1. Overview of self-leveling floors

Self-leveling floor is a kind of ground decoration material with self-leveling function. It is usually made of cement, sand and some additives (such as polymers, water-reducing agents, etc.) mixed in a certain proportion. Self-leveling floors can form a flat, smooth surface through natural flow and self-leveling during the construction process, and are highly decorative and durable. Common self-leveling floor applications include industrial plants, shopping malls, office buildings, and home decoration.

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2. Basic features of RDP

Redispersible Polymer Powder (RDP)?itself is a powder made by drying polymer emulsion. Its main ingredients include polyacrylate, polyurethane, ethylene-vinyl acetate copolymer, etc. Its important features include:

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Water solubility: RDP can be redispersed into emulsion form in water and can be fully mixed with cement, mortar and other base materials.

Enhanced performance: RDP can enhance the compressive strength, crack resistance, water resistance, aging resistance, etc. of self-leveling floors, significantly improving the durability of the floor.

Improved constructability: After adding RDP, the fluidity, adhesion and operability of the self-leveling floor are improved, which helps to complete the ground leveling and polishing more smoothly during the construction process.

Environmental protection: As an environmentally friendly material, RDP releases less harmful substances during its production process and is more friendly to construction workers and the environment.

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3. The role of RDP in self-leveling floors

In the application of self-leveling floors, RDP plays a multi-faceted role, mainly in the following aspects:

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3.1 Improve crack resistance and strength

The basic materials of self-leveling floors are generally cement and sand. These materials themselves have limited crack resistance and strength. As a high molecular polymer, RDP can form a uniform polymer network in the cement matrix to strengthen the cement slurry, thereby improving the crack resistance and strength of the self-leveling floor. This is especially important for floors that bear pressure for a long time, and can effectively prevent cracks caused by shrinkage, temperature changes or external impact.

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3.2 Improve wear resistance

The application of RDP in self-leveling floors can significantly improve the wear resistance of the floor. The polymer film formed by RDP can enhance the density of cement paste, thereby reducing the number of pores on the cement surface and reducing the probability of wear and peeling. This enables self-leveling floors to maintain good surface conditions over a long period of use, which is of great practical value especially in industrial and commercial locations.

3.3 Improve adhesion and bonding

After RDP is redispersed in the cement slurry, it can form a stable latex film that forms good adhesion with the substrate surface, thus enhancing the adhesion between the self-leveling floor and the substrate. This helps to avoid shedding, cracking, etc. caused by ground foundation problems and ensures the long-term stability of the floor.

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3.4 Improve construction performance

The construction of self-leveling floors requires high fluidity and operability. As an additive, RDP can improve the fluidity of the slurry, making it easier to spread and level. During the construction process, the self-leveling floor added with RDP can cover the base more evenly and the construction speed can also be improved. In addition, RDP?can also improve the water retention of the slurry and avoid early drying or surface peeling in dry environments.

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4. How to use RDP and its proportions

In the construction of self-leveling floors, the use method and proportion of RDP are important factors affecting the performance of the floor. Usually, the amount of RDP added is between 2% and 5%. The specific amount needs to be determined according to the type of self-leveling floor, construction environment and final performance requirements. RDP is mixed with base materials such as cement and sand in a certain proportion, and sufficient mixing is required during the construction process to ensure uniform distribution.

4.1 Proportioning recommendations

Cement: About 50% to 70% of self-leveling floors.

Sand: accounts for about 20% to 40% of self-leveling floors.

RDP: The general addition amount is 2% to 5% (based on cement weight), which can be adjusted according to actual needs.

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4.2 Construction suggestions

When mixing, it is recommended to mix dry powder materials (such as cement, sand, RDP, etc.) evenly before adding water, and use high-efficiency mixing equipment to fully stir to ensure uniform distribution of materials.

At the construction site, attention should be paid to the ambient humidity and temperature to avoid construction difficulties or quality problems caused by excessive drying.

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Redispersible Polymer Powder (RDP), as an enhanced polymer additive, plays a vital role in the application of self-leveling floors. By improving crack resistance, enhancing strength, improving wear resistance, and improving construction performance, RDP has significantly improved the performance of self-leveling floors. Therefore, in the production and construction process of self-leveling floors, rational selection and use of RDP can effectively improve the comprehensive performance and long-term stability of the floor, and is an important means to improve the quality of the floor.