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公元一世纪,罗马作家老普林尼在自己的著作里曾赞美罗马海堤的坚固。2000年过去了,当时的海堤仍保存至今,而现代的钢筋混凝土海堤只能用几十年,这是为什么?英国《每日电讯报》7月初报道称,如今美国的科学家们找到了问题的答案:当年的罗马建筑师用火山灰、石灰和海水制成灰浆,再加入大量的火山岩,制成混凝土。火山灰、水和石灰会发生所谓的凝硬性反应,在凝固过程中,混合物的缝隙中会形成结晶。这
The first century AD, the Roman writer Pliny had praised the solidity of the Roman seawall in his own writings. The year 2000 has passed since the seawall was still preserved to date, and the modern reinforced concrete seawall can only last for decades. Why is this? The British “Daily Telegraph” reported in early July that scientists in the United States have now found The answer to the question: The Roman architects of the year made mortar from volcanic ash, lime and sea water and added a lot of volcanic rocks to make concrete. Polar ash, water and lime occur so-called pozzolanic reactions, during the solidification process, the mixture will form crystals in the gap. This