In this post, we will discuss the Evolution of Slip Form Now a Days.
Evolution of Slip Form Nowadays
Slipform has been accepted as a precise construction technique within a comparatively short period of time – an indication of its considerable popularity.
This popularity has in turn encouraged further research ensuring the adoption of new methods and modern materials, which have firmly established slipforming as an economical, rapid and accurate form of construction.
Now that it is properly developed, the technique can be applied to many different forms of structure, including tapering formations with straight or parabolic profiles incorporating constant reductions in wall thickness.
Traditional applications for slipforming are silos, chimneys, bridge piers, water towers, a special application like the construction of pylons, lift core wall of the building, lining for tunnel shaft, framed structures etc.,
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- Evolution of Slip Form Now a Days
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Principles of Slipform
Slipform construction, also referred to as sliding form construction, is similar to an extrusion process. Plastic concrete is placed in the forms, and the forms act as moving die to shape the concrete.
Once the form has been filled with fresh concrete and hardening has started the form is gradually raised by the lifting devices on which it is suspended. The rate of movement of the form is regulated so that the forms leave the concrete after it is strong enough to retain its shape while supporting its own weight.
Pouring of concrete, tying of reinforcement, fixing of openings/inserts etc., are performed gradually from a working platform. An average sliding speed of 200 mm an hour is common, rising to 300 mm an hour under the best conditions and 100 to 150 mm an hour when large or complicated structures are being slip formed.
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