There are Roman concrete breakwaters built more than 1,500 years ago that still stand strong, maybe even stronger now than they were back then. A team of scientists from USA, China and Italy have discovered the recipe of the Roman concrete: a mix of volcanic ash, lime (calcium oxide), seawater and lumps of volcanic rock. Their findings could help today's builders construct durable marine structures.
A team of researchers from the Department of Energy’s (DOE’s) Lawrence Berkeley (Berkeley Lab) and Lawrence Livermore (LLNL) national laboratories, as well as from the University of California at Davis, have developed the first-ever end-to-end simulation code to precisely capture the geology and physics of regional earthquakes, and how the shaking impacts buildings. The code will take advantage of exascale supercomputers, the future supercomputers that will be 50 times faster than the US’s most powerful system today. Their work is part of the DOE’s Exascale Computing Project (ECP), a collaborative effort between the DOE’s Office of Science and National Nuclear Security Agency and was recently published in the Institute of Electrical and Electronics Engineers (IEEE) Computer Society’s Computers in Science and Engineering.
In the last twenty years, China’s urban population has more than doubled and aggressive development in the cities was necessary in order to host more people. However, the massive urbanization resulted in thousands of historic sites and buildings being destroyed, to make way for roads and reservoirs. But gradually, instead of demolishing these structures, the practice of relocation began to gain ground, and nowadays it is a common procedure in the Asian country, with a whole industry behind it. The buildings are either disassembled from roof tile to foundation and rebuilt in a new position, or moved to it on rails.