Fire performance of recycled aggregate concrete: Challenges and future prospects

Yousuf, Zubair and Hlavička, Viktor (2023) Fire performance of recycled aggregate concrete: Challenges and future prospects. Concrete Structures, 24. pp. 112-123. ISSN 1586-0361

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Abstract

The substantial amount of building and demolition waste that is produced worldwide and that is frequently disposed of by dumping and landfilling, which causes social and environmental problems, is discussed in the article. In order to address this issue, recycling technology for C&D trash has been created, and waste from the construction and demolition industries is turned into recycled aggregate that is then used to create recycled aggregate concrete. This strategy might aid in addressing the raw material shortage, cutting waste, and promoting environmentally friendly building methods. The effectiveness of recycled aggregate concrete (RAC) against fire is also explored in the research. The combination of components used, as well as their quality and manufacturing, might affect how fire-resistant RAC is. Because RAC is made of a solid, inert material with less water than traditional concrete, it has been shown to have excellent fire-resistant qualities overall. However, compared to conventional aggregate concrete, RAC may show more spalling and suffer a larger decrease in strength when subjected to high temperatures. The impact of variables like moisture content and compressive strength on the danger of spalling is also highlighted in the paper. According to the study, sustainable concrete built with RAC may, with proper design, meet specified fire design goals, although it may function mechanically less well at extremely high temperatures than conventional concrete.

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