“Slipform Construction: How Continuous-Pour Formwork Works (and the Panel Behind It)” is nog niet beschikbaar in Nederlands

Slipform construction casts concrete with a moving formwork rig raised continuously by hydraulic jacks climbing on steel rods set into the fresh pour. Concrete is placed in shallow lifts at the top of a short form while the form slides upward at a rate matched to how fast the mix sets. Because the rig never stops, the result is a monolithic section with no cold joints, cast around the clock until the wall, core, or shaft reaches its planned height.

Slipform moves continuously during the pour; climbing (jump) formwork moves in discrete steps between separate pours. A climbing system casts one lift, lets it cure, then lifts the whole bracket to the next level and casts again, leaving a construction joint at each lift. Slipform skips those joints by never stopping. Slipform suits tall, uniform sections; climbing formwork suits work where the geometry changes floor to floor and the schedule can absorb a curing pause.

Both, depending on the rig. On large heavy-civil slipform work, silos, chimneys, and big building cores, the sliding form face is frequently steel, which holds its dimension across a long continuous climb. Plywood and film-faced board do the form face on smaller or bespoke slipform sections, and they are the routine material for the working deck, blockouts, and bespoke infill around yokes almost everywhere. So plywood is best understood as the form-face panel on lighter or custom work and the deck-and-detail material elsewhere, not as the universal slip face.

When the slip face is plywood, the continuous sliding contact against curing concrete is harder on the panel than a static wall form, so a phenolic-bonded, phenolic film-faced panel at EN 636-3 (Class 3) is the right call. Pro Form is the EN 636-3 panel in Vinawood's range, rated up to 20 reuses; the HDO range is the equivalent on North American formply programmes. Seal every cut edge before the panel goes into the form, and plan against the lower part of the reuse band, because a slip face wears faster than a static one.