MAir 720 | MCT CHEMICALS | MASTER BUILDER SOLUTIONS

Usage of MAir 720

MAir 720 is highly versatile and can be used in a wide range of concrete applications, especially in environments where durability and workability are of critical importance:

1. Freeze-Thaw Resistant Concrete:
   • MAir 720 is commonly used in concrete that will be exposed to freeze-thaw conditions, such as pavements, roads, driveways, and foundations. The air bubbles it creates help to absorb the stresses from freezing and thawing cycles, preventing cracking and damage.
2. Concrete for Harsh Environments:
   • Ideal for concrete used in environments exposed to chemical attacks or extreme weather, such as coastal areas with salt exposure or areas with high water content, helping to improve the durability and longevity of concrete.
3. Improved Workability for Ready-Mix Concrete:
   • When added to ready-mix concrete, MAir 720 enhances the workability, making it easier to handle and place, which is especially beneficial for large pours or complex structures.
4. Concrete for Precast Elements:
   • MAir 720 is often used in the production of precast concrete elements such as walls, beams, and slabs, where both durability and ease of handling during production are required.
5. Surface Finishing:
   • The air entrainment provided by MAir 720 can assist in creating a smoother, more consistent finish on concrete surfaces, which is essential for high-quality architectural or decorative concrete.

Application of MAir 720

MAir 720 is applied directly into the concrete mix during batching. The following application guidelines should be followed to achieve the best results:

1. Dosage:
   • The typical recommended dosage of MAir 720 ranges between 0.05% to 0.2% by weight of cement, depending on the desired air content and the specific mix requirements.
   • The exact dosage should be determined based on trial mixes and the desired air content, as air-entraining admixtures’ effectiveness can vary depending on mix proportions and environmental conditions.
2. Mixing:
   • MAir 720 should be added to the mix along with the other admixtures or directly with the water to ensure uniform distribution of the air bubbles throughout the concrete. It is important to avoid overdosing, as excessive air entrainment can negatively affect concrete strength and performance.
3. Compatibility:
   • MAir 720 is compatible with most cement types and other commonly used concrete admixtures such as plasticizers and retarders. However, it should be tested in combination with other admixtures before use to ensure optimal performance.

Coverage of MAir 720

The coverage of MAir 720 depends on the dosage applied and the air content required. As a general guideline:

• Coverage Rate: Typically, 0.05% to 0.2% by weight of cement is recommended. For every 100 kg of cement, this corresponds to 50-200 mL of MAir 720.
• The exact coverage will depend on the air content requirement for the specific application, as well as the environmental conditions and the type of concrete mix.

Advantages of MAir 720

MAir 720 offers several advantages that make it an excellent choice for a wide variety of concrete applications:

1. Improved Freeze-Thaw Resistance:
   • By introducing controlled air bubbles into the concrete, MAir 720 significantly improves the concrete’s resistance to freeze-thaw damage, making it ideal for outdoor concrete applications exposed to harsh winters.
2. Enhanced Durability:
   • Concrete mixed with MAir 720 is more durable and resistant to cracking, especially in environments subject to extreme temperatures or chemical exposure. The air bubbles improve the material’s ability to withstand stress from freezing, thawing, and deicing chemicals.
3. Better Workability:
   • The air entrainment provided by MAir 720 improves the workability and flow of the concrete mix, making it easier to place, finish, and compact, especially in complex or detailed pours.
4. Cost-Effective:
   • By reducing the need for additional water or other methods to improve workability, MAir 720 can be a cost-effective solution that enhances both the performance and efficiency of concrete.
5. Smoother Finishing:
   • Concrete treated with MAir 720 results in a smoother, more consistent surface finish, making it suitable for decorative and architectural concrete applications.
6. Reduced Shrinkage and Cracking:
   • The controlled air bubbles reduce the internal stresses that lead to drying shrinkage and cracking, leading to longer-lasting and more stable concrete structures.
7. Sustainability:
   •  helps improve the overall sustainability of concrete, reducing the environmental impact of freeze-thaw damage and extending the life of structures, reducing the need for repairs or replacements.
8. Compatible with Other Admixtures:
   •  compatible with other concrete admixtures such as superplasticizers, retarders, and accelerators, allowing for flexibility in designing concrete mixes for different requirements.