In the quest to bolster the geotechnical properties of sandy soils, a groundbreaking study led by Masoud Amelsakhi, an Assistant Professor in the Civil Engineering Department at Qom University of Technology in Iran, has unveiled promising results. Published in the journal ‘مدلسازی پیشرفته در مهندسی عمران’ (Advanced Modeling in Civil Engineering), the research explores the potential of waste concrete to enhance the internal friction angle of sandy soils, a critical factor in the stability and strength of soil structures.
Amelsakhi and his team conducted a laboratory study focusing on the impact of waste concrete with a grain size of 1.2 to 1 inch on sandy soils. The research investigated the effects of adding concrete waste at varying weight percentages—0, 10, 20, and 30—on both loose and dense sandy soils. The findings, derived from large-scale direct shear tests, are nothing short of transformative.
“The addition of concrete waste significantly increased the shear strength and internal friction angle of the soil,” Amelsakhi explained. “For loose sand samples, the most substantial improvement was observed with the addition of 30% concrete waste, which increased the internal friction angle by an impressive 32%.” Even for dense sand, the addition of just 10% concrete waste led to a notable 4% increase in the internal friction angle.
These results are particularly relevant for the energy sector, where the stability of sandy soils is crucial for the construction of infrastructure such as pipelines, foundations, and offshore platforms. The ability to enhance the geotechnical properties of sandy soils using waste concrete not only improves structural stability but also promotes sustainable practices by repurposing construction waste.
The commercial implications are substantial. By utilizing waste concrete, companies can reduce disposal costs and potentially lower the expenses associated with soil stabilization. This innovative approach could lead to more cost-effective and environmentally friendly construction practices, benefiting both the industry and the environment.
Amelsakhi’s research suggests that the most significant improvements are seen in loose sand, particularly with the addition of 30% waste concrete. This finding opens up new avenues for future developments in soil stabilization techniques, potentially revolutionizing how we approach construction in sandy terrains.
As the energy sector continues to expand into challenging environments, the need for stable and reliable soil foundations becomes ever more critical. Amelsakhi’s work provides a promising solution, offering a sustainable and effective method to enhance soil properties. The study not only advances our understanding of geotechnical engineering but also paves the way for more innovative and eco-friendly construction practices.
In a world increasingly focused on sustainability and efficiency, this research stands as a testament to the power of innovative thinking and the potential of waste materials to drive progress. As we look to the future, the insights gained from this study could shape the next generation of construction and engineering practices, ensuring a more stable and sustainable built environment.