Why is Roman Concrete More Durable than Modern Concrete? / How to Win a Bar Fight?

This video answers the question of why do we have ancient Roman concrete structures that have been in service for almost 3000 years but some of our modern roads and bridges do not last 50 years?  Some practical information is also given about bar fights.  www.tylerley.com

More information about Roman cements can be found here:
History of Cement

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