We previously reported on the required mechanical characteristics and a deformation evaluation method for thermal insulators used in floor slabs directly above footing beams, and for formworks composed of extruded polystyrene foam that don’t require removal.
In the present study, bending and bearing pressure experiments were conducted on a component specimen, focusing on (1) the bending stiffness of the formwork when the polystyrene foam extrusion direction is perpendicular to the formwork bearing span, and (2) the bearing stiffness against a square pipe used as a joist member.
Moreover, a full-scale experiment was conducted using loads equivalent to those during actual construction, and it was confirmed that the foam formwork deformation during construction can be assessed based on the stiffness obtained from the component experiment.
In this paper, the scope of the evaluation of foam formworks in the previous report is expanded based on the results of these experiments.
