Scientist Harry Coumnas Clears the Mystery about the 2000 Year Old Roman Concrete - PowerPoint PPT Presentation

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Scientist Harry Coumnas Clears the Mystery about the 2000 Year Old Roman Concrete

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Scientist Harry Coumnas has unlocked the mystery of Roman concrete which has resisted the elements for thousands of years. The ancient sea walls built by the Romans used concrete made up of lime and volcanic ash to bind with rocks. Harry has discovered that the elements within the volcanic material reacted with the sea water to strengthen the construction. – PowerPoint PPT presentation

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Title: Scientist Harry Coumnas Clears the Mystery about the 2000 Year Old Roman Concrete


1
Scientist Harry Coumnas Clears the Mystery about
the 2000 Year Old Roman Concrete
2
Scientist Harry Coumnas has unlocked the mystery
of Roman concrete which has resisted the elements
for thousands of years. The ancient sea walls
built by the Romans used concrete made up of lime
and volcanic ash to bind with rocks. Harry has
discovered that the elements within the volcanic
material reacted with the sea water to strengthen
the construction.
3
Rather than getting eroded, the material has
gained strength in the presence of sea water. And
it is believed that this discovery can lead to
environmentally friendly buildings material.
Unlike the modern concrete mixture which erodes
over time.
4
In various tests it is seen that the Roman sea
walls and harbors contained a rare mineral called
aluminium tobermorite. It is believed that this
strengthening substance crystallized in the lime
as the Roman mixture generated heat when exposed
to sea water.
5
Harry Coumnas has carried out a more detailed
examination of the harbor samples using an
electron microscope to map the distribution of
elements. They also used two other techniques,
X-ray micro-diffraction and Raman spectroscopy,
to gain a deeper understanding of the chemistry
at play.
6
THANK YOU Harry Coumnas
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