PMI core material foam industry production standards and methods of use:

The industry standard for the production of polystyrene mandrels: 5kg - 6kg polystyrene foam board; ensure that the core mold is flat without protrusions and collapses, to ensure that the bonded foam board does not loose; the foam core mold is made It must be 1-2 cm smaller than the size of the mandrel on the drawing. The most important point is to ensure that the mandrel can be placed in the cage without being too small, which will waste concrete.

The polystyrene benzene core mold uses a specific method: after laying the foundation, after the steel cage is completed, the bottom layer of cement should be poured first; the polystyrene core mold is drawn into the steel cage. After the cement is poured, it is no longer necessary to take out the mandrel and leave it inside. Calculate a 13-meter hollow slab beam according to a cubic bubble board. If the core mold is 0.6m wide and 0.4m high, then its own weight is: 13*0.4*0.6*6=18.72kg. So the core foam Self-weight will have no effect at all.