The Impact of Construction on CO₂ Emissions
While transportation and energy are commonly recognized as primary contributors to global CO₂ emissions, the construction industry is equally culpable, accounting for a staggering 34% of emissions, according to the International Energy Agency. The root of the issue lies in the materials used, especially Portland cement, which emits between 0.6 and 0.8 tons of CO₂ for every ton produced, owing to both energy consumption and chemical processes involved in its creation.
Innovative Alternatives in Construction Materials
In the quest to mitigate these emissions, replacing traditional materials like concrete and brick has become essential. One promising alternative comes from the ARDH Collective, a Dubai-based company formed by Alhaan Ahmed, Alyina Ahmed, and Máximo Tettamanzi. They have invented DuneCrete, an innovative construction material made from locally sourced desert sand and date seeds, which reduces cement content by 50% compared to conventional concrete.
DuneCrete and Its Benefits
DuneCrete not only cuts down on cement usage but also offers an eco-friendly solution by utilizing abundant local resources. The bricks produced, known as DuneBlocks, and an additional product called Dateform—a material that incorporates 1,000 date seeds per square meter—are a testament to sustainable innovation in the construction sector.
The Importance of Sustainable Practices
Sand is the most consumed resource after water, with the United Nations Environment Program estimating that up to 50 billion tons of sand and gravel are utilized annually worldwide. Unsustainable sand extraction leads to severe ecological consequences, including erosion, damage to water supplies, and biodiversity loss. By replacing imported river sand with underutilized desert sand, ARDH Collective is promoting sustainability while addressing a pressing global issue.
Environmental Implications
DuneCrete’s ability to reduce cement content by 50% aligns with efforts to curtail the carbon footprint of construction. Since Portland cement is responsible for approximately 8% of global emissions, finding alternatives is crucial. Additionally, even moving towards renewable energy in cement production does not mitigate the inherent emissions from the chemical reactions involved.
The Unique Context of the UAE
Interestingly, the UAE must import sand despite its desert terrain. This paradox arises from the physical characteristics of desert sand; its rounded grains, shaped by wind erosion, complicate its use in conventional concrete mixtures, which favor the angular particles found in river sand.
Origin and Development of DuneCrete
The ARDH Collective’s journey began during a master’s program at the Architectural Association School of Architecture in London. Initial research, conducted in a garage laboratory during the pandemic, secured funding of $8,000, enabling them to experiment with stabilizing desert sand mixtures. After numerous tests confirming the material’s strength, production commenced in 2021.
Challenges Ahead
Despite solving some of the challenges related to desert sand geometry, scaling the DuneCrete project faces hurdles. The variability in desert sand morphology presents a challenge in ensuring consistency and reliability. Although ARDH Collective claims DuneCrete is “just as strong” as traditional concrete, further academic research and third-party assessments are necessary to validate these claims and confirm its transformative potential in the construction industry.
As ARDH Collective continues to innovate at the intersection of sustainability and technology, the implications of their work resonate well beyond the UAE, potentially influencing global construction practices.