The construction industry is evolving towards sustainable concrete alternatives to mitigate the environmental impact of traditional concrete production. Researchers are exploring innovative methods to promote a circular economy and conserve natural resources by replacing natural coarse aggregates with alternative materials such as waste paper aggregate (WPA) and polyethylene terephthalate (PET). The use of recycled paper waste in concrete has shown promising results, enhancing insulation properties and durability, making it a viable option for eco-friendly construction in seismic regions. However, challenges exist, as the high water absorption capacity of recycled paper waste can affect workability and mechanical properties, necessitating the optimization of water-to-cement ratios and the use of additives like plasticizers or dune sand.
Studies have shown that incorporating WPA into mortar can improve mechanical properties like compressive and flexural strength, making it a promising material for construction applications that require durability and load-bearing capacity. The fibrous nature of WPA acts as a physical reinforcement within the mortar matrix, enhancing its resistance to compressive and flexural stresses. Additionally, the thermal conductivity of mortars containing WPA decreases as the percentage of WPA increases, indicating improved thermal insulation properties.
On the other hand, the incorporation of PET in mortar can pose challenges, as it may hinder cement hydration, leading to weaker and less dense microstructures, resulting in reduced compressive and flexural strengths. Despite these challenges, using PET and WPA in mortar formulations presents opportunities for sustainable construction practices, making building solutions more environmentally friendly and cost-effective.
Advanced analysis techniques using software like Gwyddion have enabled researchers to study the distribution and segmentation of WPA fibers in mortars, providing insights into the structural properties of these materials. By understanding the alignment patterns of WPA fibers within mortar matrices, researchers can optimize mix designs for enhanced performance.
In conclusion, the research on the effect of waste paper aggregate and polyethylene terephthalate on mortar performance highlights the potential of these recycled materials in improving the sustainability and durability of construction materials. By addressing workability challenges and optimizing mix designs, WPA and PET can play a significant role in advancing eco-friendly building practices and reducing the environmental impact of the construction industry.
