Work

Utilization of Waste Powder Coating as a Sustainable Additive for Improving Mechanical and Durability Properties of Concrete

Year: 2025

Type: article

Abstract: By 2025, the global powder coating market is projected to produce 4.35 million tons annually, with nearly 0.42 million tons becoming waste (~9.6%). Recycling waste powder coating (WPC) could help address this issue while supporting sustainability goals. Lightweight concrete reduces cement use by 20% by incorporating waste materials, yet its production still contributes to 8% of global CO₂ emissions. This study examines the effects of adding WPC (0–30 %wt) on the mechanical properties of concrete and mortar under water and heat curing. Results show that, among the used WPC concentrations, 10% WPC enhanced 28-day compressive strength by 57% (heat-cured concrete) and 19% (water-cured), while mortar strength increases by 27% and 12%, respectively. Heat curing melts the polymer, sealing surface pores and improving strength. Brazilian tensile strength also rises significantly (82% for heat-cured concrete) using 10% WPC. FT-IR analysis confirms WPC’s positive impact on hydration. The findings suggest WPC up to 10% can enhance concrete performance while reducing environmental impact.

Source: Journal of Al-Azhar University Engineering Sector

DOI: 10.21608/auej.2025.380338.1829

Authors: salah galal madbouly, ahmed A Elshami, hazem F khalil, Moustafa F bakr

Institutions: Al-Azhar University, Housing and Building National Research Center, National Research Centre

Language: English

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Industry, innovation and infrastructure, Climate action

Open Access status: bronze

OpenAlex ID: W4415911884