This article is about pouring concrete in moving forms. For another type of slip forming, see slipform stonemasonry. For the manufacture of ceramic vessels, see slip casting.
The first residential building of slipform construction; erected in 1950 in Västertorp, Sweden, by AB ByggingLater picture of the residential building in Västertorp
Slip forming, continuous poured, continuously formed, or slipform construction is a construction method in which concrete is poured into a continuously moving form.[1] Slip forming is used for tall structures (such as bridges, towers, buildings, and dams), as well as horizontal structures, such as roadways. Slipforming enables continuous, non-interrupted, cast-in-place "flawless" (i.e. no joints) concrete structures that have performance characteristics superior to those of piecewise construction using discrete form elements. Slip forming relies on the quick-setting properties of concrete, and requires a balance between quick-setting capacity and workability. Concrete needs to be workable enough to be placed into the form and consolidated (via vibration), yet quick-setting enough to emerge from the form with strength. This strength is needed because the freshly set concrete must not only permit the form to "slip" by the concrete without disturbing it, but also support the pressure of the new concrete and resist collapse caused by the vibration of the compaction machinery.
Slipforming of a 118 metre-tall grain silo in Zürich in 2015Continuous slip formed gravity-based structure supports under construction in a Norwegian fjord. The visible jib cranes would be delivering buckets of concrete to the support cylinders during the continuous pour of concrete creating seamless walls.
In vertical slip forming the concrete form may be surrounded by a platform on which workers stand, placing steel reinforcing rods into the concrete and ensuring a smooth pour.[2] Together, the concrete form and working platform are raised by means of hydraulic jacks.[3] Generally, the slipform rises at a rate which permits the concrete to harden by the time it emerges from the bottom of the form.[1]
In horizontal slip forming for pavement and traffic separation walls, concrete is laid down, vibrated, worked, and settled in place while the form itself slowly moves ahead. This method was initially devised and utilized in Interstate Highway construction initiated by the Eisenhower administration during the 1950s.
Slipform monobox system
^ abNawy, Concrete Construction Engineering Handbook, 2008, p. 10—33.
^Cite error: The named reference Balti was invoked but never defined (see the help page).
^Nawy, Concrete Construction Engineering Handbook, 2008, p. 10—34.
Slipforming, continuous poured, continuously formed, or slipform construction is a construction method in which concrete is poured into a continuously...
It is a stop-start process with day joints formed at each lift level. Similar to slipforming, jump forming is only efficient for structures with repetition...
legal form, establishing a person or business as the legal owner of a vehicle Pink slip, a deprecated vehicle inspection paper in Australia Pink slip (employment)...
Slip casting, or slipcasting, is a ceramic forming technique, and is widely used in industry and by craft potters to make ceramic forms. This technique...
In psychoanalysis, a Freudian slip, also called parapraxis, is an error in speech, memory, or physical action that occurs due to the interference of an...
automating concrete construction processes was also being developed. Slipforming, a widely used technique today for building vertical concrete cores for...
The slip knot is a stopper knot which is easily undone by pulling the tail (working end). The slip knot is related to the running knot, which will release...
parts. Pottery techniques include the potter's wheel, slip casting and many others. Methods for forming powders of ceramic raw materials into complex shapes...
poured into forms. The forms are containers that define the desired shape. Concrete formwork can be prepared in several ways, such as slipforming and steel...
extreme loads. Given the knot's propensity to jam, it is often made in slippedform. The buntline hitch, when bent to a yard, makes a more secure knot than...
press moulding, transfer moulding, pultrusion moulding, and slipforming. There are also forming capabilities including CNC filament winding, vacuum infusion...
Group, a member of the consortium that owns the tower. A repetitive slip-forming process was used to construct the tower's core floor by floor. By late...
failure, a distinct slip plane would form behind a sliding retaining wall and suggested that the maximum shear stress on the slip plane, for design purposes...
Construction is a general term meaning the art and science of forming objects, systems, or organizations. It comes from the Latin word constructio (from...
A deposit slip or a pay-in-slip is a form supplied by a bank for a depositor to fill out, designed to document in categories the items included in the...
restarted if necessary for statutory holidays or bad weather, where slipforming concrete is not. Upon mine closure and mine reclamation a steel headframe...
outer surface Precast concrete Slipforming, construction method in which concrete is poured into a continuously moving form Matthias Dupke: Einsatzgebiete...
wound-rotor motor, also known as slip ring-rotor motor, is a type of induction motor where the rotor windings are connected through slip rings to external resistance...
after the trowel-finish is complete. The broom finish is used to prevent slipping on the concrete, and the stamp finish is used for looks. Concrete Construction...
A slip coach, slip carriage or slip portion in Britain and Ireland, also known as a flying switch in North America, is one or more carriages designed...
Slip bands or stretcher-strain marks are localized bands of plastic deformation in metals experiencing stresses. Formation of slip bands indicates a concentrated...
A slip joint is a mechanical construction allowing extension and compression in a linear structure of slip joint. Slip joints can be designed to allow...
stone and other binders. The formed or compressed block is then air dried and can be laid dry or with a mortar or clay slip. Sand is used with cement, and...