In a groundbreaking study published in the journal “Discover Civil Engineering” (translated as “Exploring Civil Engineering”), researchers have unveiled promising findings on the use of waste Polyethylene Terephthalate (PET) aggregates in structural lightweight mortars, with significant implications for the construction and energy sectors. Led by Sandeep Sathe from the Department of Civil Engineering at Dr. Vishwanath Karad MIT World Peace University, the research explores the potential of recycled materials to create sustainable and cost-effective construction solutions.
The study investigates the impact of Fly Ash (FA) on the strength characteristics of mortars that incorporate recycled PET aggregates. Sathe and his team examined three different sets of mortar samples: one made exclusively with Ordinary Portland Cement (OPC) and the other two incorporating varying percentages of FA (50% and 15% with admixture). The waste PET bottles used as aggregates ranged in size from 0.150 mm to 2.36 mm, offering a viable solution for repurposing plastic waste.
One of the most compelling findings of the study is the reduction in cracking and the more ductile failure modes observed in mortars containing PET aggregates. “The use of PET aggregates contributed to a decrease in cracking in the specimens, which is a significant advantage in terms of structural integrity and longevity,” Sathe explained. This characteristic could be particularly beneficial in the energy sector, where the durability of construction materials is crucial for the long-term performance of infrastructure.
The study also revealed that mortars containing FA had greater carbonation depth than those made with OPC alone. While this might seem like a drawback, it opens up new avenues for research into the long-term behavior of these materials and their potential applications in different environmental conditions. “The increased carbonation depth in FA-containing mortars suggests that these materials may have unique properties that could be harnessed for specific applications,” Sathe noted.
One of the most exciting aspects of this research is the potential for reducing the weight of construction materials by up to 20% and enhancing water absorption by up to 30%. These properties make lightweight mortars containing waste PET aggregates a promising choice for the production of sustainable construction materials with both environmental and economic benefits. In the energy sector, lighter materials can lead to more efficient and cost-effective construction of infrastructure, such as wind turbines and solar panel installations, which require robust yet lightweight materials.
The findings of this study could shape future developments in the field of sustainable construction materials. By repurposing waste PET and incorporating FA, researchers are paving the way for more environmentally friendly and economically viable construction practices. As the world continues to grapple with the challenges of plastic waste and the need for sustainable energy solutions, this research offers a glimmer of hope and a tangible step towards a more sustainable future.
The study, published in “Discover Civil Engineering,” highlights the importance of interdisciplinary research in addressing global challenges. By bridging the gap between waste management and construction materials, Sathe and his team have demonstrated the potential for innovative solutions that benefit both the environment and the economy. As the energy sector continues to evolve, the insights gained from this research could play a crucial role in shaping the future of sustainable infrastructure.