How the Pantheon has stayed 損なわれていない for almost 2,000 years: 熟考する／考慮する 明らかにする／漏らすs how small chunks of lime gave Roman 固める／コンクリート 'self-傷をいやす／和解させるing' 能力s
- Scientists have finally discovered secret behind 古代の construction methods
- 分析 of Roman 固める／コンクリート 明らかにする／漏らすd white mineral chunks called 'lime clasts'
- 専門家s believe lime clasts help the 固める／コンクリート '傷をいやす／和解させる' itself when it 割れ目s or breaks
It's a riddle that has left engineers scratching their 長，率いるs for a very long time.
How is it that Rome's famed Pantheon has stayed 損なわれていない for almost 2,000 years while many modern 固める／コンクリート structures 崩壊する after just a few １０年間s?
Now, 研究員s may have finally discovered the secret behind 古代の construction methods ? and it's all to do with tiny pieces of lime that come with 'self-傷をいやす／和解させるing' 能力s.
の近くに 分析 of Roman 固める／コンクリート has 明らかにする／漏らすd tiny, 有望な white mineral chunks called 'lime clasts'.
It's a riddle that has left engineers scratching their 長，率いるs for a very long time. How is it that Rome's famed Pantheon has stayed 損なわれていない for almost 2,000 years while many modern 固める／コンクリート structures 崩壊する after just a few １０年間s?
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最初, it was thought these were 現在の as a result of sloppy mixing practices, or using poor-質 raw 構成要素s.
Admir Masic, an 環境の engineer from the Massachusetts 学校／設ける of 科学（工学）技術, said: 'Ever since I first began working with 古代の Roman 固める／コンクリート, I've always been fascinated by these features.
'These are not 設立する in modern 固める／コンクリート 公式化s, so why are they 現在の in these 古代の 構成要素s?
'The idea that the presence of these lime clasts was 簡単に せいにするd to low 品質管理 always bothered me.
'If the Romans put so much 成果／努力 into making an 優れた construction 構成要素, に引き続いて all of the 詳細（に述べる）d recipes that had been optimised over the course of many centuries, why would they put so little 成果／努力 into 確実にするing the 生産／産物 of a 井戸／弁護士席-mixed final 製品?
'There has to be more to this story.'
The team, which also 含むd 研究員s from Harvard and 研究室／実験室s in Italy and Switzerland, used high-res imaging and 化学製品 mapping to look at the lime clasts more closely.
And they discovered the lime may 現実に help the 固める／コンクリート '傷をいやす／和解させる' itself when it 割れ目s or breaks.
During the hot mixing 過程 needed to make 固める／コンクリート, the lime clasts become brittle ? creating an easily accessible source of calcium for the 残り／休憩（する） of the 固める／コンクリート.
The team, which also 含むd 研究員s from Harvard and 研究室／実験室s in Italy and Switzerland, used high-res imaging and 化学製品 mapping to look at the lime clasts more closely
The 研究員s discovered the lime may 現実に help the 固める／コンクリート '傷をいやす／和解させる' itself when it 割れ目s or breaks
This means that when tiny 割れ目s form in the 固める／コンクリート, the lime clasts 反応する with water and create a calcium-saturated 解答, w hich can recrystallize and quickly fill the 割れ目.
To 証明する that this was indeed the 機械装置 責任がある the durability of the Roman 固める／コンクリート, the team produced 見本s of hot-mixed 固める／コンクリート that 会社にする／組み込むd 古代の 公式化s, deliberately 割れ目d them, and then ran water through the 割れ目s.
Within two weeks the 割れ目s had 完全に 傷をいやす／和解させるd and the water could no longer flow.
An 同一の chunk of 固める／コンクリート made without the lime never 傷をいやす／和解させるd, and the water just kept flowing through the 見本.
As a result of these successful 実験（する）s, the team is working to commercialize the 修正するd 固く結び付ける 構成要素.
Their findings were published in the 定期刊行物 Science 前進するs.
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