# The Secret to Roman Concrete's Durability Revealed A 1,900-year-old latrine inspires modern concrete. - **Source:** [Scientific American Content: Global](https://brifing.si/source/4f066134-e06d-4415-87ef-305e3dc2aba6) - **Published:** 2026-07-11 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/05d714d6-79cc-4ab0-8ff3-6247055c09b2 ## The Mystery of Roman Concrete A 1,900-year-old latrine explains why Roman concrete is so durable. This structure at Hadrian's Villa offers a rare example of how the material strengthened over time. Scientists are working to uncover the secrets of this ancient material. ## Chemical Processes The Romans strengthened their concrete by mixing lime with volcanic ash. This mixture initiated mineral reactions within the concrete, increasing its durability over time. Unlike modern concrete, this process allowed the material to self-heal. ## The Effect of Carbonation Researchers discovered that calcite minerals filled the cracks in the concrete. This process occurs when carbon dioxide seeps into the concrete and reacts with calcium compounds. The result is a stronger, more durable material. ## Inspiration for Modern Concrete The durability of Roman concrete inspires modern concrete production. However, modern concrete, reinforced with steel, can weaken due to carbonation. This presents a balancing challenge for engineers. ## Environmental Impacts The concrete industry is responsible for a significant portion of global carbon emissions. Controlled carbonation can lock carbon dioxide in mineral form, reducing environmental impacts. This could make concrete both durable and sustainable. ## Future Implications The secrets of Roman concrete hold important lessons for modern engineering. The balance between durability and sustainability will play a key role in the development of future concrete technologies. These discoveries could shape the industry's future. ## Sources covering this story - https://www.scientificamerican.com/article/how-a-1-900-year-old-latrine-helps-explain-why-roman-concrete-lasts/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._