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2 2024

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Environmental Conservation by Using Recycled Aggregates: Enhancing Sustainability in Road Construction

Berwal Parveen, Gupta Nakul, Kumar Ravi, Sherif El-Sayed M., Kumar Ashish

Rocznik Ochrona Środowiska

2024

Tom 26

510--524

Every day, construction and demolition waste is generated worldwide. As the road business and traffic grow, construction materials have evolved to include more unorthodox features. Road construction and maintenance rely significantly on quarried aggregates, resulting in high resource extraction demands. There is a trend toward employing secondary (recycled) materials rather than primary (virgin) ones to address this. This transformation requires the use of a variety of secondary and tertiary components, including waste byproducts. Numerous studies have been conducted to study and analyze the suitability and practical application of recycled materials in the field. Some recycled materials have better qualities than others, proving satisfactory performance in real-world circumstances. However, concerns about their incorporation persist, based on laboratory research and field observations. These concerns emphasize the necessity for more in-depth research to address potential difficulties. It is claimed that using recycled and tertiary materials in road construction can greatly help to save natural resources. This study predicts the attributes of selected materials, such as gradation, water absorption, maximum dry density, impact value, flakiness, and elongation, to establish their appropriateness for the production of Granular Sub-base (GSB) and Wet Mix Macadam (WMM).

Maximizing the functional properties of epoxy coatings using milled Al for enhanced mechanical strength and corrosion resistance

Samad Ubair Abdus, Mohammed Jabair A., Alam Mohammad Asif, Al-Zahrani Saeed M., Sherif El-Sayed M., Seikh Asiful H, Abdo Hany S.

Materials Science Poland

2024

Vol. 42, No. 4

34--49

Herein, epoxy coatings modified with milled aluminum (Al) were tested for their mechanical strength and corrosion resistance. First, milling was performed on the as-received Al powder for 70 h. The obtained powder postmilling was added to DGEBA-type epoxy resin and cured with an amine-based D450 hardener. The milled Al powder was added in varying weight percentages (1, 2, and 3%). Different types of panels were coated using an automatic film applicator to obtain controlled film thickness and left for curing. Morphological characterization was done using field emission scanning electron microscopy and X-ray diffraction. Thermal stability of the coatings was evaluated using thermogravimetric analysis. Mechanical properties were measured using conventional testing techniques as well as nanoindentation. The analysis results suggest that milling of Al alters the structure of powder postmilling. The milling operations also have an effect on the mechanical and anticorrosion properties of the materials. The results obtained for the prepared modified coating suggest that addition of 2 wt% in the epoxy resulted in balanced mechanical and anticorrosion properties.