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lateral pressure on formwork

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Probably the most comprehensive reference is ACI's Special Publication, 
"Concrete Formwork," (SP-4) by Mary Hurd.  (www.aci-int.org and search for 
"formwork")

A. Roger Turk, P.E.(Structural)
Tucson, Arizona

Gu Jianzhong wrote:

>>After fresh concrete is poured into wall of formwork, it becomes hard with
increasing of degree of hydration and the lateral pressure on formwork will
decrease. Does the lateral pressure will disappear completely after a long
period(if shrinkage is not considered)? How much will the ultimate pressure
be? Would somebody please recommend some references for that?<<