Concrete saw
A concrete saw (also known as a consaw, road saw, cut-off saw, slab saw or quick cut) is a power tool used for cutting concrete, masonry, brick, asphalt, tile, and other solid materials. There are many types ranging from small hand-held saws, chop-saw models, and big walk-behind saws or other styles, and it may be powered by gasoline, hydraulic or pneumatic pressure, or an electric motor. The saw blades used on concrete saws are often diamond saw blades to cut concrete, asphalt, stone, etc. Abrasive cut-off wheels can also be used on cut -off saws to cut stone and steel. The significant friction generated in cutting hard substances like concrete usually requires the blades to be cooled to prolong their life and reduce dust. Blade choice. Choosing a proper diamond saw blade for the concrete saw is a necessary condition to perform a cutting task well. Apart from some basic aspects, for example, what diameters of diamond saw blades the concrete saw can accommodate, its arbor size and the blade's quality, there are some other important aspects which should also be considered: Dust control. Stones, rocks, sands and clays can contain large  amounts of crystalline silica and are used to make kerbs, flags, bricks, tiles and concrete. Cutting these materials produces airborne dust containing very fine respirable crystalline silica (RCS) particles. These particles are small and it is not always possible to see the RCS dust in normal lighting. Serious health effects, such as lung cancer or silicosis, can result from exposure to RCS. This is because fine RCS particles can penetrate deep into the lungs. There are following ways to reduce or control the dust: There are some other risks during the cutting process which will also need to be controlled  to protect the operator and the passers-by, for example, noise, flying debris, hand-arm vibration, manual handling, electricity and refueling.