"If you cut through a 4-inch thick concrete slab, using a professional-grade saw, it may demand approximately 45 minutes to one hour." Should you wear a mask when cutting concrete? Yes, definitely.

and then added them to cement concrete to strengthen it and to prevent its cracking. For their testing, they removed the metal and cotton loops from the masks, cut them up and incorporated them ...

Wear a mask when cutting concrete. You do not want to breathe concrete dust. My toilet drains are very slow. I checked the label of a drain cleaner, and it said not to use it in a toilet.

Using the microfibers in disposable masks to strengthen concrete instead can potentially ... by removing metal and cotton loops from masks, cutting them up and adding them to ordinary Portland ...