Uploaded September 2025 | Updated September 2026, 2 weeks ago
Why Roman Concrete is Self-Healing and Lasts 2,000 Years while our Crappy Shite Lasts Only Decades
We are lucky to get more than a few decades from our crappy concrete before it crumbles and needs very expensive repairs.
Imagine the reduction of fossil fuel emissions if our concrete lasted over 2,000 years, like that of Roman concrete.
Great news. We now know why Roman concrete is so durable. One of the secrets is the self-healing of cracks, and we can do this soon ourselves if we have any brains left?
Watch this video to see how, and why. Please share this knowledge far and wide...
Please donate to PaulBeckwith.net to support my research and videos connecting the dots on abrupt climate system mayhem.
Please subscribe to my YouTube channel. As well as my website, and YouTube, you can find me on Patreon, Facebook, Twitter/X, LinkedIn, Instagram, Reddit (multiple climate channels within), Quora, TikTok, Discord, Mastodon, Twitch, Vimeo, Bluesky, TruthSocial, Threads, Substack, Tumblr, Pinterest, etc...
References and Links:
Science Alert article: We Finally Know Why Ancient Roman Concrete Lasts Thousands of Years
sciencealert.com/we-finally-know-why-ancient-roman-concrete-lasts-thousands-of-years
Wikipedia article on the Pantheon in Rome
en.wikipedia.org/wiki/Pantheon,_Rome
Wikipedia page on Roman Aqueducts
en.wikipedia.org/wiki/Roman_aqueduct
Wikipedia article on Roman Concrete
en.wikipedia.org/wiki/Roman_concrete
Peer-reviewed paper on Roman concrete in Science Advances:
Hot mixing: Mechanistic insights into the durability of ancient Roman concrete
Link: science.org/doi/epdf/10.1126/sciadv.add1602
Abstract
Ancient Roman concretes have survived millennia, but mechanistic insights into their durability remain an enigma. Here, we use a multiscale correlative elemental and chemical mapping approach to investigating relict lime clasts, a ubiquitous and conspicuous mineral component associated with ancient Roman mortars. Together, these analyses provide new insights into mortar preparation methodologies and provide evidence that the Romans employed hot mixing, using quicklime in conjunction with, or instead of, slaked lime, to create an environment where high surface area aggregate-scale lime clasts are retained within the mortar matrix. Inspired by these findings, we propose that these macroscopic inclusions might serve as critical sources of reactive calcium for long-term pore and crack-filling or post-pozzolanic reactivity within the cementitious constructs. The subsequent development and testing of modern lime clast–containing cementitious mixtures demonstrate their self-healing potential, thus paving the way for the development of more durable, resilient, and sustainable concrete formulations.
Peer-reviewed paper on Roman Concrete in Journal of the American Ceramic Society:
Reactive binder and aggregate interfacial zones in the mortar of Tomb of Caecilia Metella concrete, 1C BCE, Rome
Link: ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.18133
Perplexity.ai questions that I asked:
How much does concrete and cement contribute to climate change?
How long does concrete last, and what are the main factors limiting its durability and lifetime?
Our World in Data: Annual emissions from cement
ourworldindata.org/grapher/annual-co2-cement?time=2023
Awesome article with details on how we make cement, and how we can reduce emissions from each step in the process:
Title: Solving Cement’s Massive Carbon Problem - New techniques and novel ingredients can greatly reduce the immense carbon emissions from cement and concrete production
scientificamerican.com/article/solving-cements-massive-carbon-problem
Please donate to PaulBeckwith.net to support my research and videos connecting the dots on abrupt climate system mayhem.
Please subscribe to my YouTube channel. As well as my website, and YouTube, you can find me on Patreon, Facebook, Twitter/X, LinkedIn, Instagram, Reddit (multiple climate channels within), Quora, TikTok, Discord, Mastodon, Twitch, Vimeo, Bluesky, TruthSocial, Threads, Substack, Tumblr, Pinterest, etc...
Why Roman Concrete is Self-Healing and Lasts 2,000 Years while our Crappy Shite Lasts Only Decades
We are lucky to get more than a few decades from our crappy concrete before it crumbles and needs very expensive repairs.
Imagine the reduction of fossil fuel emissions if our concrete lasted over 2,000 years, like that of Roman concrete.
Great news. We now know why Roman concrete is so durable. One of the secrets is the self-healing of cracks, and we can do this soon ourselves if we have any brains left?
Watch this video to see how, and why. Please share this knowledge far and wide...
Please donate to PaulBeckwith.net to support my research and videos connecting the dots on abrupt climate system mayhem.
Please subscribe to my YouTube channel. As well as my website, and YouTube, you can find me on Patreon, Facebook, Twitter/X, LinkedIn, Instagram, Reddit (multiple climate channels within), Quora, TikTok, Discord, Mastodon, Twitch, Vimeo, Bluesky, TruthSocial, Threads, Substack, Tumblr, Pinterest, etc...
References and Links:
Science Alert article: We Finally Know Why Ancient Roman Concrete Lasts Thousands of Years
sciencealert.com/we-finally-know-why-ancient-roman-concrete-lasts-thousands-of-years
Wikipedia article on the Pantheon in Rome
en.wikipedia.org/wiki/Pantheon,_Rome
Wikipedia page on Roman Aqueducts
en.wikipedia.org/wiki/Roman_aqueduct
Wikipedia article on Roman Concrete
en.wikipedia.org/wiki/Roman_concrete
Peer-reviewed paper on Roman concrete in Science Advances:
Hot mixing: Mechanistic insights into the durability of ancient Roman concrete
Link: science.org/doi/epdf/10.1126/sciadv.add1602
Abstract
Ancient Roman concretes have survived millennia, but mechanistic insights into their durability remain an enigma. Here, we use a multiscale correlative elemental and chemical mapping approach to investigating relict lime clasts, a ubiquitous and conspicuous mineral component associated with ancient Roman mortars. Together, these analyses provide new insights into mortar preparation methodologies and provide evidence that the Romans employed hot mixing, using quicklime in conjunction with, or instead of, slaked lime, to create an environment where high surface area aggregate-scale lime clasts are retained within the mortar matrix. Inspired by these findings, we propose that these macroscopic inclusions might serve as critical sources of reactive calcium for long-term pore and crack-filling or post-pozzolanic reactivity within the cementitious constructs. The subsequent development and testing of modern lime clast–containing cementitious mixtures demonstrate their self-healing potential, thus paving the way for the development of more durable, resilient, and sustainable concrete formulations.
Peer-reviewed paper on Roman Concrete in Journal of the American Ceramic Society:
Reactive binder and aggregate interfacial zones in the mortar of Tomb of Caecilia Metella concrete, 1C BCE, Rome
Link: ceramics.onlinelibrary.wiley.com/doi/epdf/10.1111/jace.18133
Perplexity.ai questions that I asked:
How much does concrete and cement contribute to climate change?
How long does concrete last, and what are the main factors limiting its durability and lifetime?
Our World in Data: Annual emissions from cement
ourworldindata.org/grapher/annual-co2-cement?time=2023
Awesome article with details on how we make cement, and how we can reduce emissions from each step in the process:
Title: Solving Cement’s Massive Carbon Problem - New techniques and novel ingredients can greatly reduce the immense carbon emissions from cement and concrete production
scientificamerican.com/article/solving-cements-massive-carbon-problem
Please donate to PaulBeckwith.net to support my research and videos connecting the dots on abrupt climate system mayhem.
Please subscribe to my YouTube channel. As well as my website, and YouTube, you can find me on Patreon, Facebook, Twitter/X, LinkedIn, Instagram, Reddit (multiple climate channels within), Quora, TikTok, Discord, Mastodon, Twitch, Vimeo, Bluesky, TruthSocial, Threads, Substack, Tumblr, Pinterest, etc...
