Abstract
This study investigates the development and characterization of a noise-insulating concrete (NIC) incorporating industrial waste (polypropylene, slag, and microsilica) to enhance acoustic performance and sustainability. The research aimed to identify a concrete composition balancing mechanical strength, density, and sound absorption. In the first phase, concrete samples were formulated using recycled polypropylene and other by-products, then cured and tested for compressive strength and density. The second phase focused on measuring the samples’ acoustic properties via sound absorption coefficient tests, following GOST standards. Results showed that NIC with polypropylene treatment and active additives achieved a significantly higher compressive strength (2.63 MPa) than other variants, demonstrating improved structural integrity. Moreover, NIC outperformed cellular concrete in sound insulation tests, reducing noise from 98.5 dB to 41.6 dB at 70 cm. This novel approach not only facilitates an effective solution to urban noise pollution but also contributes to eco-friendly construction practices