slipform

English

Etymology

From slip +‎ form.

Noun

slipform (countable and uncountable, plural slipforms)

1. (uncountable) A type of process for setting concrete which uses moveable forms that are moved and reused once the concrete is stiff enough to retain its shape under its own weight.
   • 2010, Thomas H. Fehring, Whitefish Bay, →ISBN:

     Like other Flagg houses, the walls were created of stone (in this case Tennessee quartzite) and mortar using a slipform process.

   • 2012, Prashant Ram, Field Study of Air Content Stability in the Slipform Paving Process:

     The objective of this study is to evaluate the impacts of vibration and consolidation of modern slipform pavers used in Wisconsin on the air-void structure and air content of portland cement concrete pavements.

   • 2014, Norbert J. Delatte, Concrete Pavement Design, Construction, and Performance, →ISBN, page 307:

     On most slipform paving projects, however, small amounts of fixed-form paving or "handwork" are still necessary.

2. (countable) A moveable form used when setting concrete using the slipform technique.
   • 1968, Water for Peace: Planning and developing water programs, page 77:

     Slipforms of various designs have been used with excellent results.

   • 2003, Abraham Warszawski, Industrialized and Automated Building Systems: A Managerial Approach, →ISBN:

     The slipform is fed with concrete from a crane-carried or rail-mounted bucket.

   • 2005, Mary Krumboltz Hurd, Formwork for Concrete, →ISBN, page 15-13:

     Vibration may be used ahead of the slipform, but consolidation must be completed as the concrete passes under the form.

Verb

slipform (third-person singular simple present slipforms, present participle slipforming, simple past and past participle slipformed)

1. To use the slipform technique when creating a concrete structure.
   • 2005, Mary Krumboltz Hurd, Formwork for Concrete, →ISBN, page 15-12:

     Since most horizontal slipforming is against a fixed form support such as rock or earth, the operation is essentially a consolidating-screeding-finishing operation.

   • 2012, JHA, Formwork for Concrete Structures, →ISBN, page 329:

     However, with recent developments, it is possible to slipform continuous vertical flutings and varying cross sections.

   • 2013, Michael R. Adamson, A Better Way to Build: A History of the Pankow Companies, →ISBN, page 60:

     To facilitate and speed construction, Charlie Pankow chose to slipform not only the service and elevator core but also the stairwells -- a more complex operation than the slipforming of the American Cement Building.

   • 2014, Ravindra Dhir, Neil Henderson, Concrete in the Service of Mankind, →ISBN:

     New materials such as the by-product PFA helped attain the extra durability required and it is quite common today to slipform with concrete that has 30% replacement of cementicious material and large doses of admixtures.