In the heart of Malaysia, researchers have uncovered a novel approach to bolstering expansive clay soils, a common challenge in construction that can lead to costly structural issues. Ng Jun Shen, a civil engineering expert from Universiti Malaysia Pahang Al-Sultan Abdullah, has spearheaded a study that could revolutionize ground improvement techniques, particularly in the energy sector where stable foundations are paramount.
The research, published in the Journal of Sustainable Construction Materials and Technologies (Jurnal Material dan Teknologi Pembinaan Lestari), explores the use of polyethylene terephthalate (PET) plastic as a sustainable replacement for coarse aggregate in stone column applications. This technique, traditionally used to enhance soil-bearing capacity, has been given a green twist by incorporating recycled PET plastic.
“Our study demonstrates that PET plastic can effectively reinforce kaolin clay, a type of expansive soil known for its problematic engineering characteristics,” explains Ng Jun Shen. The research revealed a significant improvement in soil strength, with the highest recorded increase being 17.38kPa or 48.42% compared to unreinforced kaolin specimens. This enhancement can mitigate soil settlement and structural instability, critical factors in the construction of energy infrastructure.
The implications for the energy sector are substantial. Expansive clay soils are prevalent in many regions, posing a significant challenge for the construction of stable foundations for power plants, wind turbines, and other energy facilities. By utilizing recycled PET plastic, the industry can achieve both sustainability and cost-effectiveness. “This approach not only addresses environmental concerns but also offers a viable solution to a longstanding geotechnical problem,” Ng Jun Shen adds.
The study’s findings suggest that the critical column penetrating ratio for optimal reinforcement is 1.0. This insight could guide future applications, ensuring that the technique is implemented effectively in various construction projects. As the energy sector continues to expand, particularly in regions with challenging soil conditions, this innovative method could become a cornerstone of sustainable construction practices.
The research highlights the potential for recycled materials to play a pivotal role in ground improvement, paving the way for more eco-friendly and economically viable construction techniques. As the world increasingly turns to renewable energy sources, the need for stable and sustainable foundations becomes ever more critical. This study offers a promising solution, one that could shape the future of construction in the energy sector and beyond.