Concrete form panel, and concrete formwork comprising same

A concrete formwork, comprising:

• a plurality of panels defining spaced, opposing sides of the formwork, at least some of the panels being concrete form panels each comprising:
• a foam body having a concrete-facing surface and an outward-facing surface opposite the concrete-facing surface, the outward-facing surface having a plurality of slots formed therein,
• a plurality of structural elements, each structural element having a generally C-shaped cross section having an outward-facing opening, each structural element being accommodated in a respective slot and contacting only surfaces of the slot, and each structural element having apertures formed therein for accommodating ties, and
• a film disposed on the concrete-facing surface, an interfacial strength between the film and the foam body being greater than the adhesive strength between the film and set concrete;
• and
• a plurality of ties accommodated by the structural elements and connecting the panels of the opposing sides of the formwork.

A method of forming a concrete wall, comprising:

• stacking a plurality of panels to define spaced, opposing sides of a formwork, at least some of the panels being concrete form panels each comprising:
• a foam body having a concrete-facing surface and an outward-facing surface opposite the concrete-facing surface, the outward-facing surface having a plurality of slots formed therein,
• a plurality of structural elements, each structural element having a generally C-shaped cross section having an outward-facing opening, each structural element being accommodated in a respective slot and contacting only surfaces of the slot, and each structural element having apertures formed therein for accommodating ties, and
• a film disposed on the concrete-facing surface, an interfacial strength between the film and the foam body being greater than the adhesive strength between the film and set concrete;
• connecting opposing panels with a plurality of ties accommodated in the structural elements;
• and
• pouring concrete into the volume defined between the opposing sides of the formwork.