Cast-in-place cushioning material containing expanded PET chips and foamed concrete
This technology relates to a sound-absorbing cushioning composition and a cast-in-place construction method, formulated by mixing foamed concrete, fiber reinforcement, and expanded PET chips with a surfactant.
Conventional floor noise cushioning materials have struggled to simultaneously achieve high sound absorption, cushioning performance, and ease of installation.
To address this, our technology mixes expanded PET chips derived from recycled plastic bottles and reinforced fibers from recycled insulation covers into foamed concrete, allowing for the cast-in-place installation of a highly sound-absorbent cushioning material.
Key Features:
- Cushioning composition containing 160–200 parts by weight of foamed concrete, 10–20 parts by weight of fiber reinforcement, 160–200 parts by weight of expanded PET chips, and a surfactant.
- The fiber reinforcement includes reinforced fibers made by shredding collected waste insulation covers into 5–20mm pieces, ethylene-octene copolymer rubber resin, and a sodium lignosulfonate superplasticizer.
- The expanded PET chips are produced by mixing a blowing agent with PET flakes obtained from shredded plastic bottles and then compression molding the mixture.
- Cast-in-place installation using a mixed composition of foamed concrete and cushioning material with enhanced sound absorption.
