Structure of the PCM-filled prefabricated composite floor

Concrete-free dry flooring using double steel plate modules filled with phase change materials, assembled with bolts and connecting rods

This technology is a prefabricated composite floor structure that forms building floors by bolting and connecting multiple floor modules—each consisting of a pair of spaced-apart rectangular steel plates filled with phase change material (PCM) that stores and releases heat at specific temperatures—onto a steel frame.

Most building floors are constructed using wet methods involving formwork installation, concrete pouring, curing, and form removal, which require significant equipment, labor, and skilled workers, leading to longer construction times. Even modular floor assembly methods often include concrete, which increases construction costs when accounting for the module manufacturing process.

This technology features side plates on the modules that protrude beyond the upper steel plate. A connecting bar with a guide slot is inserted through a hole in the bottom of the side plate, and bolts are passed through head insertion holes, slots, and fixing holes to secure the module to the steel frame, with the holes then sealed. A connecting rod is placed across the protruding side plates between adjacent modules, and an elastic synthetic resin sealing member is press-fitted between the rod and the upper steel plate to close the gap. Applicable to steel-frame office and commercial floors, modular homes, and factory or warehouse expansions where rapid construction is required, this system allows for lightweight, fast installation without concrete pouring, while providing thermal insulation and soundproofing through the PCM's heat storage.

‍

‍

Key Features:

• A floor module filled with phase change material that stores or releases heat between a pair of rectangular steel plates spaced apart at the top and bottom
• A side plate mounted on the side of the floor module to protrude laterally beyond the upper steel plate, with a bar through-hole formed at the bottom
• A connecting bar inserted through the bar through-hole, featuring a guide slot that extends horizontally and vertically aligns with the fixing hole
• A connecting rod with a lower part inserted into a space narrower than the gap between adjacent side plates, an upper part resting on the protruding portions of the side plates, and an elastic sealing member attached

‍

This invention was developed with support from the Ministry of Science and ICT for the PCM-filled fire-resistant Hybrid Floor system.

‍