Circular Economy in the Construction Sector – How to Build with Less Impact on Nature

In some way or other, every industry contributes to shaping a healthy environment, but the construction sector holds a particularly significant role in this regard. It remains one of the major players as urbanization continues to expand across much of the planet, and the construction process relies heavily on raw materials, many of which can be harmful to both human health and the ecosystem.

According to statistics, it is in the construction sector that 63% of the world’s materials are consumed. In Europe alone, it accounts for over 30% of the continent’s carbon footprint and more than 40% of primary energy consumption. These figures underscore the urgent need to adopt circular economy principles within the sector and to place a stronger emphasis on designing energy-efficient buildings. 

The problem is equally acute at the local level in Georgia. The sharp increase in construction activity in recent years has fueled a rise in emissions. Statistics show that while in 2000 construction sector emissions amounted to 1.37 million tons, according to 2021 data, this figure surged to 3.06 million tons.

Raw Materials Used in the Construction Sector

The most widely used and sought-after material in the construction sector is concrete. Due to its durability, high compressive strength, resistance to fire and water, and versatility, concrete is a staple in nearly all types of construction. However, despite its advantages, it comes with considerable drawbacks.

At the heart of concrete lies cement, its primary binding agent. Cement production alone is responsible for 8% of global CO2 emissions. In addition to its environmental impact, cement is also difficult and costly to recycle, which is arguably its most significant drawback. 

Another essential raw material is steel. Thanks to its high resilience and flexibility, steel allows for the creation of relatively lightweight yet durable structures, making it a key component in nearly all structural elements. However, like cement, it has a considerable impact on the ecosystem.

The most notable environmental concern with steel is its contribution to climate change. According to the World Steel Association, every ton of steel produced in 2018 resulted in an average of 1.85 tons of carbon dioxide emissions, accounting for around 8% of global CO2 emissions. However, on the positive side, steel is 100% recyclable and retains nearly all of its original properties when reused.

Today, with the advancement of modern technologies, we can extract greater value from existing assets. In particular, we can preserve resources and prevent them from turning into waste.

Benefits of Adopting a Circular Economy in Business 

The adoption of circular economy principles in the construction sector should be guided at the state level, with active involvement from all industry stakeholders, including manufacturers of specific materials. Raising awareness about responsible resource management and promoting sustainable values is equally essential. Internalizing these principles will enable businesses to better understand their role in environmental protection. This will become even more compelling when businesses recognize practical benefits: using recycled and reusable materials reduces production costs; minimizing construction waste lowers landfill and disposal expenses;  and demonstrating a commitment to sustainability enhances brand image, attracting customers, investors, and partners.

Top Three Circular Economy Strategies for the Construction Sector

•     Reuse and repurpose existing buildings by expanding their functionality
•     Minimize waste in new construction 
•     Reuse and recycle construction materials, ensuring they do not end up in landfills

If all three practices are implemented equally, CO2 emissions could be reduced by as much as 2.1 billion tons by 2050.

Putting all this into practice requires reliable and standardized information about building components. The construction industry is notoriously fragmented, with various subcontractors often designing and developing different parts of buildings without interacting with each other. This lack of coordination results in missed opportunities for material reuse. However, if each component received proper attention—with clearly documented details on material composition and other essential specifications —material waste could be substantially reduced.

To sum up, while managing a sector as vast and complex as construction presents many challenges, the implementation of a circular economy is increasingly within reach. Reducing construction costs by remodeling existing buildings is the most valuable option, which can generate 50-75% fewer emissions compared to new construction. Companies need to prioritize the use of energy-efficient materials in the construction process, which will not only reduce emissions but also promote the long-term health and well-being of future residents.