In the heart of Hanoi, Vietnam, a groundbreaking study is unfolding that could illuminate the path to a more sustainable future for the construction industry. Led by Lam V. Tang of the Hanoi University of Mining and Geology, this research is not just about building stronger structures, but also about building a greener, more energy-efficient world.
The study, published in the journal ‘Нанотехнологии в строительстве’ (Nanotechnologies in Construction), explores the potential of producing “green” light-transmitting concrete products using readily available resources like ash, slag, and glass waste. This innovative approach aims to contribute to a closed-cycle economy and support the global push towards zero carbon dioxide and other greenhouse gas emissions by 2050.
At the core of this research is the development of cement-free, light-transmitting concrete products that boast impressive strength and durability. The team utilized finely ground blast furnace slag, fly ash from incineration power plants, glass waste, and ceramic powder, combined with an activating alkaline solution and polycarboxylate superplasticizer. The result? A concrete that not only stands strong but also allows light to pass through, offering new possibilities for architectural design and energy efficiency.
“Our goal was to create a concrete that is not only strong and durable but also environmentally friendly,” said Lam V. Tang. “By using high-tonnage waste materials, we are not only reducing waste but also contributing to the development of a sustainable construction industry.”
The research involved calculating the compositions of concrete mixtures using the absolute volume method and testing the developed concretes for various properties such as average density, compressive and tensile strength, water absorption, and light transmission capacity. The results were promising, with the developed concretes achieving compressive strengths of 40-50 MPa and bending tensile strengths of 11.5-13 MPa, along with low water absorption rates of 6.5-10% by weight.
The implications of this research are far-reaching. The ability to produce light-transmitting concrete using waste materials opens up new avenues for energy-efficient building design. Imagine buildings that can harness natural light more effectively, reducing the need for artificial lighting and lowering energy consumption. This innovation could revolutionize the energy sector, contributing to the development of smarter, more sustainable cities.
Moreover, the use of waste materials in the production of concrete aligns with the principles of a circular economy, where waste is minimized, and resources are kept in use for as long as possible. This approach not only benefits the environment but also offers economic advantages, as the cost of raw materials is reduced.
As we look to the future, the research led by Lam V. Tang offers a glimpse into a world where construction and sustainability go hand in hand. The development of light-transmitting concrete using waste materials is a testament to the power of innovation in driving positive change. It is a reminder that the solutions to our most pressing challenges often lie in the most unexpected places.
In the words of Lam V. Tang, “This is just the beginning. The potential for further research and development in this field is immense, and we are excited to be at the forefront of this green revolution in the construction industry.”