Powder Defoamer: Enhancing UHPC Durability, Strength, and Surface Quality

The use of **powder defoamer in UHPC concrete** offers a multitude of advantages, significantly enhancing the material's overall performance:

• Improved Durability: By removing air bubbles, **powder defoamers** contribute to a denser concrete matrix. This increased density directly translates to improved mechanical properties and enhanced long-term durability. As LANDU's NOVASTAR data demonstrates, properly defoamed UHPC exhibits significantly reduced permeability, making it less susceptible to degradation from environmental factors.
• Higher Bonding Strength: The minimization of voids, achieved through the use of **powder defoamers**, helps to maintain the high bonding strength that UHPC is known for. This is particularly important in structural applications where load transfer is critical.
• Enhanced Surface Quality: **Powder defoamers** are essential for achieving smoother, more aesthetically pleasing UHPC surfaces. Reducing foam prevents surface defects such as pinholes and uneven finishes, improving the overall appearance of the concrete structure.
• Increased Corrosion Resistance: Fewer air pockets mean reduced moisture ingress and subsequently, less corrosion of embedded steel reinforcement. This enhanced corrosion resistance is vital for ensuring the longevity of UHPC structures, especially in harsh environments.
• Optimized Concrete Performance: When used in the right amounts, **powder defoamers** work synergistically with water-reducing agents to create a concrete mix with superior compactness and strength. It's important to note, however, that the dosage must be carefully controlled. Both overdosing and underdosing can negatively affect the performance of the UHPC.