Home›Open Questions›Why has Roman concrete endured two thousand years, in surf and weather, while modern concrete structures decay within decades?Open QuestionsWhy has Roman concrete endured two thousand years, in surf and weather, while modern concrete structures decay within decades?Citation FormatsGeneral ReferenceGeneral Reference Citation TextArchitecture and Design Atlas. "Why has Roman concrete endured two thousand years, in surf and weather, while modern concrete structures decay within decades?." Accessed August 30, 2026. https://dev-architecture.interactiveatlas.org/open-questions-index/roman-concrete-durability.Copy General ReferenceAPA StyleAPA Style Citation TextArchitecture and Design Atlas. (n.d.). Why has Roman concrete endured two thousand years, in surf and weather, while modern concrete structures decay within decades?. Retrieved August 30, 2026, from https://dev-architecture.interactiveatlas.org/open-questions-index/roman-concrete-durabilityCopy APA StyleBibTeXBibTeX Citation Text@misc{architectureanddesignatlas-why-has-roman-concrete-endured-two-thous, author = {Architecture and Design Atlas}, title = {Why has Roman concrete endured two thousand years, in surf and weather, while modern concrete structures decay within decades?}, year = {2026}, url = {https://dev-architecture.interactiveatlas.org/open-questions-index/roman-concrete-durability}, note = {Accessed August 30, 2026} }Copy BibTeXReference and ClassificationDevelopingFactsOpen QuestionCross-Tradition ConnectionsSourcesComments (0)Reader Challenges (0 open reader challenges)FactsWhy It Is OpenWell-attestedRecent materials research has produced strong partial answers, including reactions between seawater and volcanic ash that grow reinforcing minerals in Roman marine concrete, and lime fragments that may reseal cracks as they open, but the full recipe and practice remain incompletely understood, translation of the findings into modern durable and low-carbon concretes is unfinished work, and the research groups involved continue to publish competing accounts of which mechanisms matter most. 1What Would Resolve ThisWell-attestedA validated account of the Roman mix and curing practice sufficient to reproduce its durability in modern test structures, monitored over decades rather than inferred from laboratory samples. 1Discipline NeededWell-attestedMaterials Science, Archaeology, Civil Engineering 1Question KindWell-attestedMechanism 1Question StatusWell-attestedOpen 1Reader FacingWell-attestedYes 1Open QuestionRecent materials research has produced strong partial answers, including reactions between seawater and volcanic ash that grow reinforcing minerals in Roman marine concrete, and lime fragments that may reseal cracks as they open, but the full recipe and practice remain incompletely understood, translation of the findings into modern durable and low-carbon concretes is unfinished work, and the research groups involved continue to publish competing accounts of which mechanisms matter most.What would resolve this A validated account of the Roman mix and curing practice sufficient to reproduce its durability in modern test structures, monitored over decades rather than inferred from laboratory samples.OpenMaterials Science, Archaeology, Civil EngineeringEncyclopedia BritannicaCross-Tradition ConnectionsQuestion OnConcrete, Elements and Materials Well-attested Source Encyclopedia BritannicaSources1. Encyclopedia BritannicaEncyclopedia Britannica, Inc.Concrete and Roman architecture articles; ancient concrete durability coverageView the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0 open reader challenges)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.View At A Past YearThe atlas records no dated fact of its own for this entry, so there is no other year to choose.Show This Year