How can steel-troweled concrete surfaces be modified to reduce slipperiness?

Brushing or brooming concrete surfaces is an effective method for modifying the texture and reducing slipperiness. This technique involves using a broom or a brush to create a rough surface on the concrete, which enhances traction and provides a better grip for pedestrians. When the surface is brushed, it develops grooves and ridges that help to channel water, thus minimizing the risk of slipping.

In contrast, while drilling holes could potentially create some texture, it is not a commonly used method and might lead to structural integrity issues rather than enhance slip resistance. Applying a rough texture could involve various methods, but without specifics, it may not effectively provide the same traction as brooming or brushing. Applying a sealant, on the other hand, often makes a surface smoother and can lead to increased slipperiness, especially when wet. Thus, brushing or brooming is the most reliable and widely used technique to improve safety on steel-troweled concrete surfaces.