Destruction of buildings, roads, bridges, or other structures generates millions of tons of demolition waste including concrete, bricks and clay tile, asphalt, steel, etc. With the increased use of fiber-reinforced polymer (FRP) composite materials in infrastructures, recycling FRP becomes a concern for the industry. Other industries generate millions of tons of waste, such as waste polyethylene terephthalate (PET), fly ash, slags, cement kiln dust, silica fume, rice husk ash, etc. Without reusing, these materials will be landfilled or released directly to air, which will cause pollution. Therefore, utilizing these recycled materials in civil engineering is an economical, environmentally-friendly and sustainable way to reuse these wastes.

Using recycled materials in civil engineering has attracted extensive interests in the research community because of its significant benefits for environment, economy, and society. In order to be successfully and appropriately applied in various types of infrastructures in civil engineering, the mechanical properties and durability of recycled materials should be extensively and meticulously studied. The effects of possible toxic chemicals in the recycled materials should also be carefully evaluated before they could be applied in civil engineering. The main objectives of this Research Topic are to collect the state-of-the-art and the state-of-the-practice of the studies and applications of recycled materials in civil engineering, and to document future research needs.

The scope of the Research Topic focuses on fundamental knowledge that advances the application of recycled materials in structural and non-structural members in civil engineering. All submissions must include detailed characterization of the waste and transferable information that is useful to others with similar but not identical waste streams. Manuscripts published in this Research Topic are expected to reflect original research and in-field applications on topics that include, but are not limited to the experimental testing, analysis, design, and real applications of structural and non-structural members using:
• Recycled concrete
• Recycled aggregate concrete (RAC)
• Recycled brick
• Recycled fiber reinforced polymer (FRP) composite materials
• Waste polyethylene terephthalate (PET)
• Other recycled materials, such as slag, fly ash, silica fume, etc.

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Frontiers in Materials

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