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Published byAlicia Wilkinson Modified over 9 years ago
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By: Maddison Black
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Cement: binding material that, when combined with water and aggregate, forms concrete Concrete: building material formed by combining cement, water, and aggregate
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Stamped Stained Decorative Overlays Polishing Decorative Engraving Stenciling Interior Exterior Stenciled Resurfaced Rock Salt Finish Scoring & Saw Cutting Painting
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Usually comes as a dry mix Water is added to start a process called hydration hydration is what causes the concrete to harden not the drying process Concrete should be consistent all the way through Fresh concrete should be moist in the first part of hydration http://www.youtube.com/watch?v=mAFTWQM-MdE
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Forms are typically built above the ground however, some others require digging. Dig down to the desired level, and build forms to the shape and size needed for the concrete job. Using temporary posts establish the proper grade or slope of the concrete. Nail the stakes lightly to the forms used, or clamp the forms temporarily to the stakes with a "C" clamp. To ensure that you have the proper grade or slope of the concrete form, use a level. After the proper grade has been set, drive in permanent stakes and nail the form to the stakes.
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Make sure forms are properly in place. Spray area lightly with a garden hose, then pour in the concrete. After the form is filled, compact the concrete by using a tamper, or put on rubber boots and walk around the poured concrete area to make sure it is compacted around the edges. (Small concrete areas can be compacted with a 2x4. For larger areas, rent a tamper.) Use a straight-edged 2x4 to level the concrete. Work the 2x4 back and forth in sawing fashion to level the concrete at all points across the form. In hard-to-reach places use a magnesium concrete rake with an extension handle. When the concrete has set sufficiently to support a 2x8 plank, use the plank as a straightedge to guide a groover to cut contraction joints. Contraction joints are necessary to allow hardened concrete to expand and contract in extreme temperatures.
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Measure the dimensions of the site (length, width, depth) in feet. Multiply the length, width & depth to obtain the site's volume in cubic feet. Divide the product by 27 to determine the exact volume in cubic yards. Multiply this number by 1.05: this gives you 105% of the concrete required. Extra is suggested in case of a spill or accidental waste.
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(Picture is not drawn to scale.) Length: 4 feet Width: 2 feet Depth: 8 inches
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2/3 2. 4 x 2 x 2/3 1. Convert 8 inches into feet 5.3333 3. 5.3333 ÷ 27.19753 4..19753 x 1.05.20741 For a concrete slab measuring 4’ x 2’ x 8”,.20741 cubic yards of concrete is needed.
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