How To Make Roman Concrete

An Attempt at Reproducing Ancient Roman Concrete by using Limestone, Volcanic Ash and Aggregate. Please Hit The LIKE and SUBSCRIBE BUTTONS as well as the NOTIFICATION BELL. Feel Free to Check out my Amazon Influencer Page and Follow Me on Instagram, Facebook and Twitter. Thanks For Watching.

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[recall]

Please Hit The LIKE and SUBSCRIBE BUTTONS as well as the NOTIFICATION BELL. Feel Free to Check out my Amazon Influencer Page and Follow Me on Instagram, Facebook and Twitter. Thanks For Watching.

[nemesiscaym]

i am a civil engineer and i really enjoyed your video, things like these should be taught to kids in school also, hopefully from people like you

[jimfranchetto]

I am a cement finisher with 24 years working in the field and this is my first demo of Roman concrete. Thank you!

[brianthesnail]

My house in the UK was built about 200 years ago at the end of the Georgian and beginning of Victorian era. It was built using soft hand made brick, lime mortar and is also exterior plastered in lime render. I repair it using a mix of lime putty, sand and a very small amount of Portland cement instead of volcanic ash. The resulting mortar and or lime render is very similar to what is being made here. The cement is not to make the lime mortar or render hard like a modern cement mortar. It is only to begin the chemical process as a catalyst. My mixture goes hard over a period of weeks and will continue to harden for many decades. It is extremely important not to repair a building like my house with soft bricks and lime mortar using any modern concrete. It will destroy the building because it is far too hard. The lime mortar and render is flexible, allows my house to breath, stops damp building up and is very environmentally friendly as it absorbs CO2 for centuries.

When using lime putty please be very careful. It is extremely dangerous as it is corrosive. If it goes in an eye you can go blind. Always have plenty of water immediately available to wash your eyes out.

[owendavies]

Take it to a building college they should have a compressive load tester to see which of your mixes is stronger, very

[flpdd]

At this rate Rome for sure wasn't built in a day.

[falanirave]

Is there a substitute for the volcanic ash? I feel like a walk to the nearest valcano could really dampen my progress.

[solararch]

I think the exact recipe the Romans invented to make their concrete was a mystery until recently. Looks like someone finally figured it out. Many structures throughout the Mediterranean built with Roman concrete are still in use today, particularly in ports! Roman concrete ranks in the top 10 of greatest construction technologies ever invented. Thanks for making this video, very interesting!

[danielduggan]

The Roman’s were thought to have used Hot Mixing, which utilizes the most reactive form of Lime, which is Quick Lime. It’s thought that the Hot mixing was key to the self healing properties of Roman concrete

[alexandrevaliquette]

Q. Can I replace volcanic ash with camp fire ash?
A. "Heart"

For those who got a "heart" but no answer to your question... Here is my answer for you!

Volcanic ash is fine silica (mainly Silicium oxyde). Camp fire ash is a mixed alkalies (such as NaOH, KOH). They are two totaly differents chemicals, so it won't work at all.

However, volcanic ash may be replaced by ultra fine sand of even ultra fine pulverised glass.

Alexandre Valiquette, analytical chemistry tech from Montréal, Canada

[Nirky]

You've inspired me to make my driveway out of Roman concrete pavers! I figure it will only take me 39 years.

[carlderossi]

the reason why the used volcanic rock was it was lighter and had more surface space for the concrete mix to grab on to making the formula stronger. but yes it was amazing that you did this video thanks

[TheAvarusAnimus]

Man, have been watching all your survival shelter videos and then come across this! Brilliant! I remember reading about Roman concrete being used for the foundations of lighthouses, as it could set (cure) underwater to create a platform for the main lighthouse structure. Love your videos...peace from Ireland!

[nwascorpio]

We are all a very special breed of people. We just spent 20 minutes watching this man make a brick. lol <3

[mandolinic]

The concrete dome of the Pantheon has stood for a couple of thousand years. I reckon that's a great testament to Roman concrete.

[Thebear]

Good video. They just discovered that the Roman's used quicklime (CaO) not slacked lime (CaOH). Or the term is hot concrete mix. So it was volcanic ash, aggregate, and CaO (quicklime). They would then mix the dry ingredients, then add the water.

[FrauTodd]

Would really love to see a weight comparison on a scale of same sized bricks, one of modern and one roman concrete. It seemed alot lighter than the modern stuff. Thanks for the awesome video!

[francoismorin]

2000 years and those Roman buildings are still standing. I guess the quality of their concrete speaks for itself. Nice tutorial and fun experience. Thanks for sharing.

[TsetsiStoyanova]

I literally watched hundreds of concrete videos to find this one the most amazing of all and in fact the only one that i needed to watch

[uramalakia]

The neat thing about Roman concrete setting in sea water, from what I understand, is that it would bind with the salt in the sea water and create a whole new mineral... In other words, the whole thing would cure into a whole new giant rock. That's why it lasts so long.