NCCER Concrete Finishing case studies
NCCER Concrete Finishing · Put your knowledge to work in context.
NCCER Concrete Finishing is a craft training title within NCCER's catalog of construction programs and credentials. NCCER describes itself as an independent 501(c)(3) nonprofit educational foundation created in 1996, and it states that its training programs are built for industry by industry, providing the construction education needed on today's job site. The NCCER Concrete Finishing case studies are 5 cases and about 3,910 words.
1Hot, Windy Patio Pour: Evaporation Rate Exceeds the Threshold
You are the lead finisher on a 20 ft x 30 ft exterior patio slab, 5 in thick, placed over a prepared base with a 6 mil vapor retarder and #4 bar at 18 in on center. The day is 94°F, 25% relative humidity, with an 18 mph wind gusting to 25.
787 words, about 4 min2Air-Entrained Driveway: Owner Wants It "Smooth Like a Garage Floor"
You are finishing a 4 in thick, 24 ft x 40 ft residential driveway placed on a 2% slope toward the street in a climate with hard freezes and heavy road-salt use. The specified concrete is air entrained at 6% with 3/4 in aggregate, 4 in slump, water-cement ratio 0.45.
738 words, about 4 min3Saw-Cut Joints Cut Too Late and Too Shallow
You are finishing a 6 in thick, 40 ft x 60 ft unreinforced exterior slab on grade, placed starting at 2:00 p.m. on a 75°F day with light wind.
777 words, about 4 min4Curb and Gutter: Late Truck, Cold Night, and a Low Spot in the Flow Line
You are the finisher on 300 linear feet of formed curb and gutter along a subdivision street: 18 in high face, 6 in top, 24 in gutter pan, on a 4% longitudinal grade. The mix is 4 in slump with 3/4 in aggregate, and the crew has a 1½ in spud vibrator and five laborers.
817 words, about 4 min5Warehouse Slab: Troweling on Bleed Water and a Hollow Chain Drag
You are the finishing foreman on an 8 in thick, 30,000 sq ft warehouse slab placed directly on a 10 mil vapor retarder over a granular base. Slump is 4 in, water-cement ratio 0.50, air 3%, ambient 78°F, concrete 72°F.
791 words, about 4 min