▲ Up
 
12:44 21-09-2017
АКИpress CA-News Tazabek Turmush
ADVERTISE WITH US SUBSCRIBE
KazakhstanKyrgyzstanMongoliaTajikistanTurkmenistanUzbekistanWorld
POLITICSBUSINESSINCIDENTSSOCIETYCULTURESPORTANALYSISSCIENCE
Scientists explain ancient Rome's long-lasting concrete
15:08, 05 July 2017, 2446
Scientists examined samples from this ancient Roman pier with very high-powered X-rays /Image: JP OLESON
Twitterfacebookprint

AKIPRESS.COM - Researchers have unlocked the chemistry of Roman concrete which has resisted the elements for thousands of years.

Ancient sea walls built by the Romans used a concrete made from lime and volcanic ash to bind with rocks.

Now scientists have discovered that elements within the volcanic material reacted with sea water to strengthen the construction, BBC reports.

They believe the discovery could lead to more environmentally friendly building materials. Unlike the modern concrete mixture which erodes over time, the Roman substance has long puzzled researchers. Rather than eroding, particularly in the presence of sea water, the material seems to gain strength from the exposure.

In previous tests with samples from ancient Roman sea walls and harbours, researchers learned that the concrete contained a rare mineral called aluminium tobermorite.

They believe that this strengthening substance crystallised in the lime as the Roman mixture generated heat when exposed to sea water.

Researchers have now carried out a more detailed examination of the harbour 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.

This new study says the scientists found significant amounts of tobermorite growing through the fabric of the concrete, with a related, porous mineral called phillipsite.

The researchers say that the long-term exposure to sea water helped these crystals to keep on growing over time, reinforcing the concrete and preventing cracks from developing.

"Contrary to the principles of modern cement-based concrete," said lead author Marie Jackson from the University of Utah, US, "the Romans created a rock-like concrete that thrives in open chemical exchange with seawater."


Full access to all news articles in English

1 month2000 somsubscribe
year20000 somsubscribe
These subscription fees are for private individuals only. Please contact us via phone +996 (312) 900-776 or email info@akipress.org for corporate subscription inquiries
Twitterfacebookprint
LATEST NEWS
12:36 Citizen of Kyrgyzstan and Lithuania in Russia sentenced to 23 years in prison for drug trafficking12:28 Deputy PM dismissed as head of republican headquarters for elections after leaked audio tape showed his candidate preference12:05 Ratification of agreement on Kyrgyz-Uzbek state border is the only agenda in Kyrgyz Parliament today12:00 Atambayev condoles with Mexico over deadly quake11:51 Sadyr Japarov won't be released to father's funeral — State Penitentiary Service11:50 UK scientists edit DNA of human embryos11:45 Over 230 dead in Mexico quake as rescuers desperately search for survivors11:29 Russia, Turkmenistan discuss preparations for top and high level bilateral meetings11:27 CSTO foreign ministers discuss ties in New York11:26 Deputy Russian Foreign Minister, Kyrgyz Ambassador discuss cooperation11:09 'We won't be deceived by heads and rich people of other nations!' — Atambayev appeals to Kyrgyz nation at UN assembly11:01 Extraordinary meeting of SCO foreign ministers takes place in NYC10:54 11 people wounded after jeep overturned in Issyk-Kul10:49 Diplomatic Academy of Kyrgyzstan and Institute for Foreign Affairs and Trade of Hungary sign MoU10:39 CEC recommends Babanov to remove his board with Jeenbekov and Boronov10:37 Atambayev awards UN Secretary General with Friendship Order10:24 Ex-Prime Minister of Kazakhstan released from prison10:15 Astana 'surprised' by Bishkek's reaction to Nazarbayev-Babanov meeting10:07 UN recognizes Kyrgyzstan as one of most liberal and stable countries with strong civil society in Eurasian continent, Atambayev says09:52 President Atambayev meets with President Trump
© AKIpress News Agency - 2001-2017. All rights reserved
Republication of any material is prohibited without a written agreement with AKIpress News Agency. Any citation must be accompanied by a hyperlink to akipress.com.
Our address:
Moskovskaya str. 189, Bishkek, the Kyrgyz Republic
e-mail: english@akipress.org, akipressenglish@gmail.com;
Tel/Fax: +996(312)90-07-75