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Tasks: |
Set the forms that hold concrete to the desired pitch and depth, and align them. Check the forms that hold the concrete to see that they are properly constructed. Spread, level, and smooth concrete, using rake, shovel, hand or power trowel, hand or power screed, and float. Monitor how the wind, heat, or cold affect the curing of the concrete throughout the entire process. Direct the casting of the concrete and supervise laborers who use shovels or special tools to spread it. Produce rough concrete surface, using broom. Mold expansion joints and edges, using edging tools, jointers, and straightedge. Clean chipped area, using wire brush, and feel and observe surface to determine if it is rough or uneven. Signal truck driver to position truck to facilitate pouring concrete, and move chute to direct concrete on forms. Apply hardening and sealing compounds to cure surface of concrete, and waterproof or restore surface. Operate power vibrator to compact concrete. Chip, scrape, and grind high spots, ridges, and rough projections to finish concrete, using pneumatic chisels, power grinders, or hand tools. Cut out damaged areas, drill holes for reinforcing rods, and position reinforcing rods to repair concrete, using power saw and drill. Waterproof or restore concrete surfaces, using appropriate compounds. Wet concrete surface, and rub with stone to smooth surface and obtain specified finish. Wet surface to prepare for bonding, fill holes and cracks with grout or slurry, and smooth, using trowel. Fabricate concrete beams, columns, and panels. Install anchor bolts, steel plates, door sills and other fixtures in freshly poured concrete or pattern or stamp the surface to provide a decorative finish. Build wooden molds, and clamp molds around area to be repaired, using hand tools.
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