The invention provides a thin building floor sound
insulation system and a construction method, and belongs to the technical field of light sound insulation building materials. The
system sequentially comprises a base layer
processing layer, an elastic
cushion layer, a composite damping prefabricated plate layer, a
polymer bonding layer, a light leveling layer and a facing layer from bottom to top. Wherein the composite damping prefabricated plate layer is provided with an internal material gradient structure, and the composite damping prefabricated plate layer is in
continuous transition from a high-damping mixture area to a scattering enhanced mixture area from bottom to top; the
polymer bonding layer is formed by flexible
polymer modified
cement mortar, and interlayer chemical bridging and mechanical
occlusion are achieved in cooperation with self-activation treatment on the surface of the plate. Damping dissipation and
sound wave scattering are synergistically achieved through the gradient structure, interlayer stress is buffered through the flexible bonding layer, efficient attenuation of wide-frequency-band
impact sound is achieved under the conditions of extremely small thickness and
low load, and the contradiction between space limitation and high sound insulation requirements in existing
residence transformation is effectively solved.