A power trowel is a construction tool that smooths, levels, and polishes concrete surfaces. It's also known as a power float or troweling machine. 

How it works

• A motorized unit with rotating blades or pans on the bottom rotates rapidly to smooth and compact the concrete 
• The machine floats wet concrete by removing humps and filling valleys 
• It creates a smooth, hard skin by burnishing the top of the slab 

Types

• There are walk-behind and ride-on power trowels 
• The size of the machine depends on the scale of the project 

Benefits 

• Power trowel machines can cover large areas of concrete quickly, saving time and labor
• They are most commonly used for large-scale concrete projects or in situations where a high-quality finish is required

Other details

• Power trowels are an essential piece of equipment for concrete finishing jobs 
• They are commonly used in the final stages of concrete construction