The addition of polymer additives to mortars is a common practice in construction and masonry to improve the performance and performance of the mortars. Polymer additives are substances mixed into a mortar mixture to improve its workability, adhesion, flexibility, durability and other key properties. The amount of polymer additive added to the mortar can vary depending on the specific type of polymer, the desired properties of the mortar, and the manufacturer’s recommendations.

Types of polymer additives:

1.Redispersible polymer powder (RDP):
Function: RDP is often used to improve the adhesion, flexibility and workability of mortars.
Dosage: Typically 1-5% of the total dry weight of the mortar mix.

2. Latex polymer additives:
Function: Latex additives enhance the flexibility, adhesion and water resistance of mortar.
Dosage: 5-20% of cement weight, depending on the specific latex polymer.

3. Cellulose ether:
Function: Improve water retention, workability, and reduce sagging in vertical applications.
Dosage: 0.1-0.5% of cement weight.

4. SBR (styrene-butadiene rubber) latex:
Function: Enhances adhesion, flexibility and durability.
Dosage: 5-20% of cement weight.

5. Acrylic polymer:
Function: Improve adhesion, water resistance, durability.
Dosage: 5-20% of cement weight.

Guidelines for adding polymer additives to mortars:

1. Read the manufacturer’s instructions:
Be sure to refer to the manufacturer’s guidelines and technical data sheets for specific recommendations on polymer additive types and amounts.

2. Mixing procedure:
Add the polymer additive to the water or mix it with the dry mortar components before adding the water. Follow consistent mixing procedures to ensure proper dispersion.

3. Dosage control:
Accurately measure polymer additives to obtain desired properties. Excessive amounts may negatively affect mortar performance.

4.Compatibility test:
Conduct compatibility testing before using a new polymer additive to ensure it does not interact negatively with other ingredients in the mortar mix.

5. Adjust according to environmental conditions:
In extreme weather conditions, such as high temperatures or low humidity, dosage adjustments may be required for optimal performance.

6. On-site testing:
Field tests were conducted to evaluate the performance of polymer-modified mortars under real-world conditions.

7. Follow building codes:
Make sure polymer additives are used in compliance with local building codes and regulations.

8. Consideration of application:
The type of application (e.g. flooring, tiles, plastering) may influence the selection and dosage of polymer additives.

in conclusion:
The amount of polymer additive added to the mortar depends on a variety of factors, including the type of polymer, the desired properties and the manufacturer’s recommendations. Careful consideration, compliance with guidelines and appropriate testing are critical to obtaining the best results. Always consult the manufacturer and follow best practices to ensure successful application of polymer-modified mortar in construction and masonry.