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	NationMaster - Encyclopedia: Free floating screed (Site not responding. Last check: 2007-10-19)
		The free floating screed has become standard because of the smoothing or averaging effect it can have on the existing base course.
		The free floating screed has a number of forces acting on it that, when in equilibrium, allow the depth behind the screed to be constant.
		Floating cartilage (Med.), a cartilage which moves freely in the cavity of a joint, and often interferes with the functions of the latter.
	www.nationmaster.com /encyclopedia/Free-floating-screed (493 words)

	Free floating screed - Wikipedia, the free encyclopedia
		The free floating screed is a device pioneered by Barber Greene Company in the 1930s that revolutionized the asphalt paving process.
		The free floating screed has become standard because of the smoothing or averaging effect it can have on the existing base course.
		The free floating screed has a number of forces acting on it that, when in equilibrium, allow the depth behind the screed to be constant.
	www.wikipedia.org /wiki/Free_floating_screed (334 words)

	NIOSH/Engineering Controls - Asphalt/Federal Register
		Screed: The device which is towed behind the tractor to strike off, compact, contour, and smooth the paving material.
		Screed Arm: The attachment by which the screed is connected to and towed by the tractor.
		Screed End Plate: A vertically adjustable plate at the outboard end of the screed, to retain the paving material and form the edge of the mat.
	www.cdc.gov /Niosh/asfaltfr.html (3420 words)

	floating - definition by dict.die.net
		Floating cartilage (Med.), a cartilage which moves freely in the cavity of a joint, and often interferes with the functions of the latter.
		Floating island, a dish for dessert, consisting of custard with floating masses of whipped cream or white of eggs.
		Floating light, a light shown at the masthead of a vessel moored over sunken rocks, shoals, etc., to warn mariners of danger; a light-ship; also, a light erected on a buoy or floating stage.
	dict.die.net /floating (538 words)

	Free
		Free Pascal Free Pascal (or FPK Pascal) is a Amiga).
		Free Speech Movement The Free Speech Movement was a radical student movement began on the campus of the free speech.
		Free University of Berlin The Free University of Berlin (Freie Universität Berlin) is a Germany.
	www.brainyencyclopedia.com /topics/free.html (5028 words)

	7.5 Flexible Pavement Construction - Placement
		Since the screed is free floating it will slide across the HMA at an angle and height that will place these six forces in equilibrium.
		Locating the screed tow point near the middle of the tractor significantly reduces the transmission of small elevation changes in the front and rear of the tractor to the screed.
		The floating screeds used by today’s pavers are acted upon by six basic forces, which when left undisturbed result in an equilibrium screed angle and elevation that determines mat thickness.
	training.ce.washington.edu /WSDOT/Modules/07_construction/07-5_body.htm (3870 words)

	FLOATING - Definition
		Buoyed upon or in a fluid; a, the floating timbers of a wreck; floating motes in the air.
		Free or lose from the usual attachment; as, the floating ribs in man and some other animals.
		{Floating derrick}, a derrick on a float for river and harbor use, in raising vessels, moving stone for harbor improvements, etc.
	www.hyperdictionary.com /dictionary/floating (524 words)

	Floating
		Floating Gate Transistor The floating gate transistor is a variant of EEPROM memory.
		Floating Storage and Offloading unit A Floating Storage and Offloading unit (FSO) is, as its name suggests, a floating s...
		Free floating screed The free floating screed is a device pioneered by Barber Greene Company in the 1955, and now all ma...
	www.brainyencyclopedia.com /topics/floating.html (197 words)

	Method and apparatus for automatically controlling the temperature of an asphalt paver screed - Patent 5607254
		Screw augers spread the material on the roadbed in front of a floating screed, which is connected to the paving machine by pivoting tow or draft arms.
		The thickness and width of the pavement is established by the material-compacting, screed assembly 105.
		As shown, the screed assembly 105 is attached to the chassis 110 by a pair of draft arms 130.
	www.freepatentsonline.com /5607254.html (2285 words)

	Variable width material distribution system for asphalt pavers and the like - Patent 4749304
		It has been known heretofore to construct a floating screed paver with a power extendable/retractable screed arrangement, enabling the operator of the paver to vary the effective width of the screed at any time, even while the paver is in motion and in operation.
		Thus, the free lower portion of the intermediate panel 101 is confined by the cooperative relationship between the upwardly bent lip portions 103, 113.
		Additionally, the movable auger arrangement is mounted on the screed or strike-off itself, such that the significant and highly variable reaction forces on the auger are necessarily imparted to the screed, having a potentially undesirable effect upon the smoothness of the pavement mat.
	www.freepatentsonline.com /4749304.html (9393 words)

	Pavement (roads) - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-19)
		In areas with very soft or expansive subgrades such as clay or peat, thick gravel bases or stabilization of the subgrade with Portland cement or lime can be required.
		The actual material used in paving is termed HMA (Hot Mix Asphalt), and it is usually applied using a free floating screed.
		The material is applied in a freshly-mixed slurry, and worked mechanically to compact the interior and force some of the thinner cement slurry to the surface to produce a smoother, denser surface free from honeycombing.
	www.lexington-fayette.us /project/wikipedia/index.php/Pavement_(roads) (1007 words)

	Current Publications 2000 - Free leaflets
		Where screeds are, or have to be laid on a damp-proofing membrane or separating layer, the minimum thickness of the screed should be at least 50 mm.
		Screeds should be laid in areas as large as possible in one operation, consistent with achieving acceptable surface regularity and the levels required, to minimise the number of joints.
		Once the screed has been compacted it should be taken to the correct level with a screed board riding on the screed strips or battens (or side forms in the case of monolithic screeds).
	www.cnci.org.za /inf/leaflets_html/screeds.html (6587 words)

	Creative Homeowner - Dream ~ Design ~ Create.
		Floating is the first step in the finishing of concrete and is done immediately after screeding.
		To use a bull float, push it across the surface with the front edge raised a bit; when pulling it back, lay the blade flat to cut off bumps and fill any tiny holes.
		Caution: After the first floating, do not do anything else until the water sheen is gone from the surface of the concrete.
	www.creativehomeowner.com /index.php?pane=project&projectid=chmas115 (728 words)

	NationMaster - Encyclopedia: Pavement (roads) (Site not responding. Last check: 2007-10-19)
		In areas with very soft or expansive subgrades such as clay or peat, thick gravel bases or stabilization of the subgrade with Portland cement or lime can be required.
		The actual material used in paving is termed HMA (Hot Mix Asphalt), and it is usually applied using a free floating screed.
		A. Two immisicble liquids, not emulsified; B. An emulsion of Phase B dispersed in Phase A; C. The unstable emulsion progressively separates; D. The (purple) surfactant positions itself on the interfaces between Phase A and Phase B, stabilizing the emulsion An emulsion is a mixture of two immiscible (unblendable) substances.
	www.nationmaster.com /encyclopedia/Pavement-(roads) (1930 words)

	Section 9 - 2005 Online QMS Manual
		The paver screed is a free floating unit that strikes off, partially compacts, and irons the surface of the mat as it is pulled forward by the tractor unit.
		This allows the screed to "float", dependent upon the forces acting on the screed as it is being pulled forward by the tractor unit.
		Once the screed is nulled out, it is good practice to increase the angle of attack by turning each depth screw handle approximately one full turn (depending on the make of paver) from the nulled out position of the screed and start paving, checking and adjusting until proper mat depth is obtained.
	www.ncdot.org /doh/operations/dp_chief_eng/constructionunit/paveconst/Asphalt_Mgmt/qms_manual/2005/sect09a.htm (12562 words)

	products-warm-wall
		The Gyvlon screed is not intended to be a wearing surface, and adequate protection from other construction trades may be necessary in areas of heavy use such as loading bays.
		Screed drying time is 1 mm/day up to 40 mm thickness in warm and well-ventilated drying conditions.
		The entire area where screed is to be installed must be frost free and not subject to temperatures of less than 2 °C or more than 30°C. • The surface of the screed must be protected from water, severe draughts and direct sunlight.
	website.lineone.net /~jason.pearson/products-screeds.htm (925 words)

	Isocrete K-Screed (Site not responding. Last check: 2007-10-19)
		Alternatively, unbonded and floating screed may be reinforced throughout with steel fabric to BS4483 Ref D49.
		In the event that the screed is not dry, Isocrete Aqualock surface damp proof membrane may be used to allow immediate installation of the floor coverings.
		With unbonded and floating screeds, edge separation to all walls and columns must be provided with a strip of compressible material.
	www.robert-e-lee.co.uk /isocrete/kscreed.htm (1498 words)

	Construction - Laydown
		Because the screed elevation responds slowly to changes in screed angle, the paver naturally places a thinner mat over high points in the existing surface and a thicker mat over low points in the existing surface (TRB, 2000).
		Screed angle can also be adjusted manually by using a thickness control screw or depth crank.
		Figure 6 shows that it typically takes five tow lengths (the length between the tow point and the screed) after a desired level is input for a screed to arrive at the new level.
	www.asphaltwa.com /wapa_web/modules/07_construction/07_laydown.htm (988 words)

	Section 9 - 2004 Online QMS Manual
		The paver screed is a free floating unit that strikes off, partially compacts, and irons the surface of the mat as it is pulled forward by the tractor unit.
		This allows the screed to "float", dependent upon the forces acting on the screed as it is being pulled forward by the tractor unit.
		Once the screed is nulled out, it is good practice to increase the angle of attack by turning each depth screw handle approximately one full turn (depending on the make of paver) from the nulled out position of the screed and start paving, checking and adjusting until proper mat depth is obtained.
	www.doh.dot.state.nc.us /operations/dp_chief_eng/constructionunit/paveconst/Asphalt_Mgmt/qms_manual/2004/sect9a.htm (13377 words)

	Asphalt paver with remixing conveyor system - Patent 6007272
		The hopper 7 is adapted to receive hot mix asphalt material (not shown) from a truck (not shown) that has been backed up against bumper rollers 13 situated at a front 15 of the paver 3.
		The spreading means 9 generally comprise a pair of opposing screw or spreading augers that distribute the hot mix asphalt material in front of the screed 11, generally transversely to the direction of travel 17 of the paver 3.
		The screed 11 levels and partially compacts the hot mix asphalt material distributed by the spreading means 9 for subsequent compaction by an asphalt roller machine (not shown).
	www.freepatentsonline.com /6007272.html (3916 words)

	Station Information - Free floating screed
		Barber Greene dominated the market until the patent expired in 1955, now all major ashalt paver manufacturers use this design principle in their equipment.
		Tow Arm Pull-the force exerted on the screed by the paver dragging it along.
		The angle at which the Tow Arm Pull is exerted on the screed also contributes to the equation, its resultant force is either added or subtracted from the Mass of the screed.
	www.stationinformation.com /encyclopedia/f/fr/free_floating_screed.html (282 words)

	RECYCLING AS A LIFE-EXTENDING MAINTENANCE TACTIC
		The screeds are usually heated, with vibratory or tamping bar designs for initial compaction and with automatic grade and slope control.
		In single-pass repaving, the last unit in the HIR train uses one screed to place the recycled mix and a second to place the HMA mix; both layers are then compacted as one.
		In the multiple-pass method, the last unit in the train has a single screed that places the recycled mix while a conventional HMA paver follows immediately behind to place and screed the virgin hot-mix asphalt layer on the recycled mix; both layers are compacted as one.
	www.betterroads.com /articles/jul02sup2.htm (2246 words)

	Floor Screeds - JC Wilkins Ltd - www.floorscreeding.co.uk
		Tarmac Truflow Self Levelling Screed is highly versatile and can be applied as a bonded or unbonded screed, as a floating screed over thermal or sound insulation and is also ideal for use in conjunction with underfloor heating systems.
		For all floor types abrupt changes in screed thickness should always be avoided as these may lead to the formation of cracks.
		The dried screed is suitable to take all types of floor finish but is not itself designed to be used as a wearing surface.
	www.floorscreeding.co.uk /html/tilcon_truflo_1.htm (1388 words)

	Feature - Caterpillar Paving Products Inc. (Site not responding. Last check: 2007-10-19)
		The change in screed angle of attack will be relatively small and the change in screed height will be spread over a portion of the mat.
		The change in screed angle of attack will be relatively large and the screed will change height rapidly.
		Any time a screed extension is moved in or out significantly, the head of material in front of the extension will change.
	www.baumpub.com /publications/heg/heg_features/heg_04sep_f6.htm (1254 words)

	Paving. Who is Paving? What is Paving? Where is Paving? Definition of Paving. Meaning of Paving.
		The process of laying down HMA (Hot Mix Asphalt) as a layer of a road or parking lot.
		Most commonly performed using a free floating screed.
		This article is licensed under the GNU Free Documentation License.
	www.knowledgerush.com /kr/encyclopedia/Paving (44 words)

	DEVI Australia
		A 20-25mm thick sand/cement screed is laid over the cables, which have been secured on top of concrete, fibre cement sheeting or even waterproofing.
		In Screed heating enables you to use almost any type of floor covering available, e.g.
		Because the heating cables are closer to the surface than an In Slab installation the response time is quicker but the floor's ability to retain heat will be less.
	www.devi.com.au /screed.htm (208 words)

	Striking off concrete by hand and bull floating - Concrete Basics Concrete Construction - Find Articles (Site not responding. Last check: 2007-10-19)
		The purpose of bull floating is to smooth the surface of the concrete and make it flat.
		Bull floats come in several sizes and shapes and are made from magnesium or aluminum.
		Sometimes when the concrete is too high or too low in small areas, you can "juke" the bull float back and forth quickly, an inch or so at a time, to make the concrete more liquid and cause it to move toward low areas.
	www.findarticles.com /p/articles/mi_m0NSX/is_2_48/ai_98469395 (684 words)

	Cronkhite Industries, Inc. - Screed Vibe
		It's the revolutionary Screed Vibe® which not only levels the concrete but settles the aggregate in one smooth operation.
		The Screed Vibe® works best on metal screeds up to 20 feet in length or on wood screeds up to about 16 feet.
		Cronkhite Industries, Inc., warrants the Screed Vibe® to be free from defects in materials and workmanship for a period of one (1) year from date of purchase.
	www.cronkhitetrailers.com /Screed.htm (598 words)

	Section 9 - 2004 Online QMS Manual
		The automatic screed controls operate on the principle that if the screed is made to follow a smooth line regardless of irregularities in the surface being paved, a smooth pavement grade will result.
		The command panel, the grade sensor, and the pendulum feed electric impulses to a control box which activates the motors or cylinders to change the relative elevation of the screed arm pull points, thereby changing the screed tilt (angle of attack) and automatically compensating for road surface irregularities.
		The automatic screed controls get information from a sensing device riding on either an erected stringline that has been set as the grade reference, from a mobile reference device capable of averaging the grade over a minimum 30 foot (9 meters) distance, a joint matching device or some combination of these.
	www.ncdot.org /doh/Operations/dp_chief_eng/constructionunit/paveconst/Asphalt_Mgmt/qms_manual/2004/sect9a.htm (13377 words)

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