concreteDefinition from Wiktionary, the free dictionary Jump to: navigation, search Wikipedia has articles on: ConcreteAdjectiveconcrete (comparative more concrete, superlative most concrete)
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From Wiktionary under the GNU Free Documentation License. Concrete is a construction material composed of cement (commonly Portland cement) and other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate made of gravels or crushed rocks such as limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures. The word concrete comes from the Latin word "concretus" (meaning compact or condensed), the past participle of "concresco", from "com-" (together) and "cresco" (to grow). Concrete solidifies and hardens after mixing with water and placement due to a chemical process known as hydration. The water reacts with the cement, which bonds the other components together, eventually creating a stone-like material. Concrete is used to make pavements, pipe, architectural structures, foundations, motorways/roads, bridges/overpasses, parking structures, brick/block walls and footings for gates, fences and poles. Concrete is used more than any other man-made material in the world. As of 2006, about 7.5 cubic kilometres of concrete are made each year—more than one cubic metre for every person on Earth. Concrete powers a US$35 billion industry, employing more than two million workers in the United States alone. More than 55,000 miles (89,000 km) of highways in the United States are paved with this material. Reinforced concrete, prestressed concrete and precast concrete are the most widely used types of concrete functional extensions in modern days. From Wikipedia under the
GNU Free Documentation License How to prepare soil for a concrete patio? Q. I am planning to have a concrete patio poured at my new house. How can I be sure the contractor is properly preparing the "underlayment" before pouring the concrete? I know that a certain amount of dirt should be removed (about 8"), that 3/4" gravel and fine gravel should add back about 4" when compacted, and that there should be a pre-soil treatment as well as a vapor barrier installed before the rebar goes down, but what else should I be sure gets done before the 4" thick concrete gets poured? Also, what PSI rating should the concrete be for this type of application? I am in the Southern California area, in case weather is a concern. Asked by djasail - Thu Jun 1 13:44:41 2006 - - 5 Answers - 0 Comments A. The newly updated standards for ground-supported monolithic concrete flooring is to ONLY use vapor barrior when it is an area that is air-conditioned. So, if your patio is "open-air" like a porch and garage, and will not have conditioned air above it, then do not use any vapor-barrior. Stand firm on this, as vapor barrior pushes too much water to the surface during concrete curing and can cause more cracks then needed. Dampen the ground before placing the concrete so that the dirt does not wick moisture away from the fresh concrete. This will also help in cracking. Vibrate the concrete, if you can, by tapping on the form-boards with a hammer. Place #4 rebar at a minimum of 12 inches on center, and tied at intersections with wire-tie [cont.] Answered by GraceHead - Fri Jun 2 18:31:06 2006 What type of concrete is used in city sidewalks? Q. My driveway and my stairs to my front door are made of the same type of concrete as city sidewalks. I know this because there is a sidewalk in front of my front yard, and it blends in with my driveway. There are now cracks in my stairs and I want to patch them with the right concrete.. I bought a pail of concrete patch two years ago to fix it, but the concrete color/texture did not match. Now the cracks have resurfaced, but I want to patch it again, but with the right concrete. What type of concrete should I buy? Asked by kingoftown77 - Fri Jul 2 09:41:13 2010 - - 6 Answers - 0 Comments A. More than likely the city used standard portland cement, along with sand and aggregate. Nothing special. The color you see now is the result of the sand and aggregate used, plus aging. It is unlikely you'll be able to match the color of the city's sidewalks exactly, since they (nor you) will know which sources of sand and aggregate they used when the original walk was poured. A company specializing in decorative concrete may be able to get close using tints and dyes. Rather than trying to match the existing, consider using concrete stain to make the stairs a uniform but contrasting color to the drive. This may look better than trying to match what's there. This can be a DIY job, or hire a decorative concrete finishing company to do… [cont.] Answered by Richard - Fri Jul 2 09:53:48 2010 What should this cost to pump the concrete thru a hose into a basement room?
Q. I have a 8 ft x 9 ft room in my basement without any concrete it is just sandy/rocky soil. I assume I need about 3-1/2 slab to make it even with the other part of the basement. What should this cost to pump the concrete thru a hose into the room? There is only a small window adjacent to the room to get the concrete in; I do not think a trough will fit though that window. Asked by jeffreygreen77 - Mon Jan 28 17:04:12 2008 - - 4 Answers - 0 Comments A. Pump rental costs vary by area. Maybe you can get a weekender deal. Contact the local concrete distributor. They should be able to give you a good estimate. Answered by Wounded Duck - Mon Jan 28 17:13:33 2008 From Yahoo Answer Search: "concrete"  abc.az Mon, 30 Aug 2010 10:47:19 GMT+00:00 Azerbaijan Business Center ... new practice selection for preferential state financing of investment projects on priorities of development of concrete districts of the country. ...  bostonherald.com Thu, 12 Aug 2010 15:50:38 GMT+00:00 from Allston overpass Boston Herald The state Department of Transportation is investigating how a chunk of concrete came to plummet from an Allston overpass yesterday onto ...  online.wsj.com Mon, 30 Aug 2010 00:23:20 GMT+00:00 Wall Street Journal The Constitution is a marvelous document, and a reasonable interpretation of it means as well that no American can be forced to pour concrete . ... From Google News Search: "concrete"  bbamusic.wikispaces.com 660px x 767px | 80.00kB [source page] http bbamusic wikispaces com file view Golden+Ears+1 2 mp3 http bbamusic wikispaces com file view Improting+Audio swf http bbamusic wikispaces com file view Musique Concrete JPG http bbamusic wikispaces com file view Keyboard+Trainer swf From Yahoo Image Search: "concrete"  creativelifestylereviews.com Lifestyle Editor hu, 02 Sep 2010 08:03:13 GM Concrete. stop walls serve all kinds of needs. They are used for retaining walls. They is usually used for fences. The one factor they have in frequent is they're boring to appear at! Should you would like to boost the appearance of a ... From Google Blog Search: "concrete"  video.google.com Tue, 23 Dec 2008 17:30:43 PST An instructional video on Stegmeier Corporation's Pour-In-Place Countertops. How to install a concrete kitchen counter top. Step by step ... video.google.com.  ehow.com Wed, 23 Dec 2009 10:50:50 PST "Hi I'm Tim Gipson and I'm going to talk to you about how to measure yardage for concrete and concrete is sold by the yard. So when ... ehow.com.  youtube.com Wed, 25 Mar 2009 04:25:23 PDT Musique Concrete is the experimental technique of musical composition using recorded sounds as raw material. The principle uses the assemblage of ... youtube.com. From Google Video Search: "concrete" |
