Advantages and Disadvantages of Using a Steel Trowel for Concrete Finishing Compared to Other Methods
When selecting the appropriate tool for concrete finishing, contractors and DIY enthusiasts often consider several factors, including the desired finish, the exposure to weather, and the complexity of the job. This article delves into the advantages and disadvantages of using a steel trowel for concrete finishing, compared to traditional methods such as wood float and magnesium float.
Steel Trowel for Concrete Finishing
Steel trowels are a popular choice for concrete finishing, particularly because they excel in creating a super smooth and polished surface, which is excellent for applications where aesthetics and ease of cleaning are essential. However, steel trowels also have their advantages and disadvantages compared to wood and magnesium floats.
Advantages of Steel Trowels
Smooth Finish: Steel trowels are adept at providing a super smooth finish, making them ideal for warehouses, garages, and polished concrete floors. This smooth surface is crucial for applications where aesthetics and ease of cleaning are paramount.
Denser Surface: The tight compaction achieved by steel trowelling results in a denser concrete surface. This denser surface improves wear resistance, reduces water permeability, and can enhance the concrete's overall strength.
Exposure to Elements: Steel-trowelled concrete is generally more resistant to weathering and de-icing salts, making it an excellent choice for exterior applications.
Disadvantages of Steel Trowels
Overworking: One significant disadvantage of steel trowels is that overworking can bring too much fine material and cement paste to the surface, weakening the surface layer and potentially leading to cracking.
Reduced Traction: A very smooth steel-trowelled surface can be slippery, especially when wet. Anti-slip treatments may be necessary for walkways or ramps.
Skills Required: Achieving a good finish with a steel trowel requires practice and good technique. It is important to time the steel trowelling correctly to avoid tearing or roughening the surface too early or making the concrete too hard to work with too late.
Alternatives: Wood Float and Magnesium Floats
Both wood and magnesium floats offer alternative methods for concrete finishing, each with its own set of advantages and disadvantages.
Wood Floats
Advantages: Wood floats are easier to use for beginners and create a slightly textured surface with good traction. They also help bring moisture to the surface for better finishing later.
Disadvantages: While wood floats can create a textured surface, they are not ideal for achieving a very smooth finish. They may leave a slightly rough surface, which is not suitable for applications requiring a finer look.
Magnesium Floats
Advantages: Magnesium floats create a smoother surface than wood but not as polished as steel. They are good for achieving a matte finish and are less likely to overwork the surface, leading to cracking.
Disadvantages: Magnesium floats can be more expensive than wood floats, which might be a deciding factor for some budget-conscious projects.
Choosing the Right Tool
The best tool for finishing concrete depends on the desired finish, the application, and the skill level of the user. Here are some recommendations:
Steel Trowel: Ideal for smooth, polished surfaces with good wear resistance, such as warehouses and garages.
Wood Float: A good choice for beginners who need a textured surface with good traction, such as sidewalks and exterior walkways.
Magnesium Float: A balanced choice between smoothness and texture, suitable for achieving a matte finish in interior floors.
Conclusion
When choosing between steel, wood, or magnesium floats, consider the specific requirements of your concrete project. Steel trowels offer unparalleled smoothness and denser surfaces, but they require careful handling to avoid overworking and can be slippery. Wood and magnesium floats are versatile options with their own unique advantages, making them suitable for a range of projects. By understanding the advantages and disadvantages of each method, you can select the best tool for your concrete finishing needs.