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Details for Terrazzo Workers and Finishers


Description

Apply a mixture of cement, sand, pigment, or marble chips to floors, stairways, and cabinet fixtures to fashion durable and decorative surfaces.

Tasks

  • Cut metal division strips and press them into the terrazzo base wherever there is to be a joint or change of color, to form desired designs or patterns, and to help prevent cracks.
  • Blend marble chip mixtures and place into panels, then push a roller over the surface to embed the chips.
  • Measure designated amounts of ingredients for terrazzo or grout according to standard formulas and specifications, using graduated containers and scale, and load ingredients into portable mixer.
  • Mold expansion joints and edges, using edging tools, jointers, and straightedges.
  • Spread, level, and smooth concrete and terrazzo mixtures to form bases and finished surfaces, using rakes, shovels, hand or power trowels, hand or power screeds, and floats.
  • Grind curved surfaces and areas inaccessible to surfacing machine, such as stairways and cabinet tops, with portable hand grinder.
  • Grind surfaces with a power grinder and polish surfaces with polishing or surfacing machines.
  • Position and secure moisture membrane and wire mesh prior to pouring base materials for terrazzo installation.
  • Modify mixing, grouting, grinding, and cleaning procedures according to type of installation or material used.
  • Wash polished terrazzo surface, using cleaner and water, and apply sealer and curing agent according to manufacturer's specifications, using brush or sprayer.
  • Mix cement, sand, and water to produce concrete, grout, or slurry, using hoe, trowel, tamper, scraper, or concrete-mixing machine.
  • Sprinkle colored marble or stone chips, powdered steel, or coloring powder over surface to produce prescribed finish.
  • Wet surface to prepare for bonding, fill holes and cracks with grout or slurry, and smooth, using trowel.
  • Cut out damaged areas, drill holes for reinforcing rods, and position reinforcing rods to repair concrete, using power saw and drill.
  • Clean installation site, mixing and storage areas, tools, machines, and equipment, and store materials and equipment.
  • Fill slight depressions left by grinding with a matching grout material, and then hand trowel for a smooth, uniform surface.
  • Chip, scrape, and grind high spots, ridges, and rough projections to finish concrete, using pneumatic chisel, hand chisel, or other hand tools.
  • Clean chipped area, using wire brush, and feel and observe surface to determine if it is rough or uneven.
  • Move terrazzo installation materials, tools, machines, and work devices to work areas, manually or using wheelbarrow.
  • Build wooden molds, clamping molds around areas to be repaired, and setting up frames to the proper depth and alignment.
  • Signal truck driver to position truck to facilitate pouring concrete, and move chute to direct concrete on forms.
  • Produce rough concrete surface, using broom.
  • Precast terrazzo blocks in wooden forms.
  • Spread roofing paper on surface of foundation, and spread concrete onto roofing paper with trowel to form terrazzo base.
  • Remove frames once the foundation is dry.
  • Wet concrete surface, and rub with stone to smooth surface and obtain specified finish.

Interests

  • Realistic - Realistic occupations frequently involve work activities that include practical, hands-on problems and solutions. They often deal with plants, animals, and real-world materials like wood, tools, and machinery. Many of the occupations require working outside, and do not involve a lot of paperwork or working closely with others.

Education, Training, Experience

  • Education - These occupations usually require a high school diploma.
  • Training - Employees in these occupations need anywhere from a few months to one year of working with experienced employees. A recognized apprenticeship program may be associated with these occupations.
  • Experience - Some previous work-related skill, knowledge, or experience is usually needed. For example, a teller would benefit from experience working directly with the public.

Knowledge

  • Design - Knowledge of design techniques, tools, and principles involved in production of precision technical plans, blueprints, drawings, and models.
  • Chemistry - Knowledge of the chemical composition, structure, and properties of substances and of the chemical processes and transformations that they undergo. This includes uses of chemicals and their interactions, danger signs, production techniques, and disposal methods.
  • Building and Construction - Knowledge of materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads.

Skills

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