Brickmasons, Blockmasons, and Stonemasons
Brickmasons, blockmasons, and stonemasons (or, simply, masons) use bricks, concrete blocks, and natural stones to build fences, walkways, walls, and other structures.
Masons typically do the following:
- Read blueprints or drawings to calculate materials needed
- Lay out patterns or foundations, using a straightedge
- Break or cut bricks, stones, or blocks to their appropriate size
- Mix mortar or grout and spread it onto a slab or foundation
- Lay bricks, blocks, or stones according to plans
- Clean excess mortar with trowels and other handtools
- Construct corners with a corner pole or by building a corner pyramid
- Ensure that a structure is perfectly vertical and horizontal, using a plumb bob and level
- Clean and polish surfaces with hand or power tools
- Fill expansion and contraction joints with the appropriate caulking materials
The following are common types of masons:
Brickmasons and blockmasons—who often are called bricklayers—build and repair walls, floors, partitions, fireplaces, chimneys, and other structures with brick, precast masonry panels, concrete block, and other masonry materials.
Pointing, cleaning, and caulking workers repair brickwork, particularly on older structures on which mortar has come loose. Special care must be taken not to damage the structural integrity or the existing bricks.
Refractory masons are brickmasons who specialize in installing firebrick and refractory tile in high-temperature boilers, furnaces, cupolas, ladles, and soaking pits in industrial establishments. Most of these workers are employed in steel mills, where molten materials flow on refractory beds from furnaces to rolling machines. They also are employed at oil refineries, glass furnaces, incinerators, and other locations with manufacturing processes that require high temperatures.
Stonemasons build stone walls, as well as set stone exteriors and floors. They work with two types of stone: natural-cut stone, such as marble, granite, and limestone; and artificial stone, made from concrete, marble chips, or other masonry materials. Using a special hammer or a diamond-blade saw, workers cut stone to make various shapes and sizes. Some stonemasons specialize in setting marble, which is similar to setting large pieces of stone.
Cement Masons and Terrazzo Workers
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.
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.