Cement masons pour, smooth, and finish concrete floors, sidewalks, roads, and curbs. Using a cement mixture, terrazzo workers create durable and decorative surfaces for floors and stairways. Show Details
Cement masons typically do the following:
Set the forms that hold concrete in place
Install reinforcing rebar or mesh wire to strengthen the concrete
Signal truck drivers to facilitate the pouring of concrete
Spread, level, and smooth concrete, using a trowel, float, or screed
Mold expansion joints and edges
Monitor curing (hardening) to ensure a durable, smooth, and uniform finish
Apply sealants or waterproofing to protect concrete
Terrazzo workers typically do the following (in addition to what cement masons do):
Measure ingredients for terrazzo
Blend a marble chip mixture that may have colors in it
Grind and polish surfaces for a smooth, lustrous look
Concrete is one of the most common and durable materials used in construction. Once set, concrete—a mixture of cement, sand, gravel, and water—becomes the foundation for everything from decorative patios and floors to huge dams or miles of roadways.
The following are types of cement masons and terrazzo workers:
Cement masons and concrete finishers place and finish concrete. They may color concrete surfaces, expose aggregate (small stones) in walls and sidewalks, or make concrete beams, columns, and panels.
Throughout the process of pouring, leveling, and finishing concrete, cement masons must monitor how the wind, heat, or cold affects the curing of the concrete. They must have a thorough knowledge of the characteristics of concrete so that, by using sight and touch, they can determine what is happening to the concrete and take measures to prevent defects.
Terrazzo workers and finishers create decorative walkways, floors, patios, and panels. Although much of the preliminary work in pouring, leveling, and finishing concrete is similar to that of cement masons, terrazzo workers create more decorative finishes by blending a fine marble chip into the cement, which is often colored. Once the terrazzo is thoroughly set, workers correct any depressions or imperfections with a grinder to create a smooth, uniform finish.