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Tasks: |
Measure designated amounts of ingredients for terrazzo or grout according to standard formulas and specifications, using graduated containers and scales, and load ingredients into portable mixer. Cut metal division strips and press them into the terrazzo base for joints or changes of color to form designs or patterns or to help prevent cracks. Blend marble chip mixtures, place into panels, and push a roller over the surface to embed the chips. Grind surfaces with a power grinder or polish surfaces with polishing or surfacing machines. Modify mixing, grouting, grinding, or cleaning procedures, according to type of installation or material used. Grind curved surfaces or areas inaccessible to surfacing machine, such as stairways or cabinet tops, with portable hand grinder. Spread, level, or smooth concrete or terrazzo mixtures to form bases or finished surfaces, using rakes, shovels, hand or power trowels, hand or power screeds, or floats. Mold expansion joints and edges, using edging tools, jointers, or straightedges. 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. Position and secure moisture membrane and wire mesh in preparation for pouring base materials for terrazzo installation. Wet surface to prepare for bonding, fill holes and cracks with grout or slurry, and smooth with a trowel. Clean installation site, mixing and storage areas, tools, machines, and equipment, and store materials and equipment. Fill slight grinding depressions with matching grout material and hand trowel for a smooth, uniform surface. Chip, scrape, or grind high spots, ridges, or rough projections to finish concrete, using pneumatic chisel, hand chisel, or other hand tools. Repair concrete by cutting out damaged areas, drilling holes for reinforcing rods, and positioning reinforcing rods, using power saw and drill. Move terrazzo installation materials, tools, machines, or work devices to work areas, manually or using wheelbarrow. Clean chipped area, using wire brush, and feel and observe surface to determine if it is rough or uneven.
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