|
Ytong
Autoclaved aerated concrete (AAC) also referred to as autoclaved cellular concrete (ACC) or simply autoclaved concrete is a lightweight, Prefabrication, prefabricated concrete building material. Developed in the mid-1920s, it is an alternative to traditional Concrete block, concrete blocks and Brick, clay bricks. AAC products are factory-prefabricated, in contrast to cellular concrete, which is typically mixed and poured on-site. AAC is a combination of quartz sand, gypsum, lime (mineral), lime, Portland cement, water, fly ash, and aluminium powder. After the aerated mixture is partially cured in a mould, the material is further cured under heat and pressure in an autoclave. AAC can be made into blocks, wall panels, floor and roof panels, cladding (façade) panels, and lintels. AAC materials are typically cut using standard power tools equipped with carbon steel cutters. AAC products may be used in various construction projects similarly to cellular concrete, cellular conc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UW 280748
UW, U.W., ''Uw'', or uw may refer to: Universities Canada * University of Waterloo, Ontario * University of Windsor, Ontario * University of Winnipeg, Manitoba United States * University of Washington ** University of Washington Bothell ** University of Washington Tacoma * University of Wisconsin System ** University of Wisconsin–Madison * University of Wyoming Other countries * University of Warsaw, Poland * University of Wuppertal, Germany * University of Würzburg, Germany Other uses * uw (digraph) * ''Uw'', the international symbol for relative humidity * Unconventional warfare * Unconventional warfare (United States), a United States-specific definition of unconventional warfare used by its Department of Defense * ''Unia Wolnosci'' (Freedom Union), a former Polish political party from 1994 to 2005 See also * WU (other) * U of W (other) * Uwu (other) {{disambiguation, school ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siding (construction)
Siding or wall cladding is the protective material attached to the exterior side of a wall of a house or other building. Along with the roof, it forms the first line of defense against the elements, most importantly sun, rain/snow, heat and cold, thus creating a stable, more comfortable environment on the interior side. The siding material and style also can enhance or detract from the building's beauty. There is a wide and expanding variety of materials to side with, both natural and artificial, each with its own benefits and drawbacks. Masonry walls as such do not require siding, but any wall can be sided. Walls that are internally framed, whether with wood, or steel I-beams, however, must always be sided. Most siding consists of pieces of weather-resistant material that are smaller than the wall they cover, to allow for expansion and contraction of the materials due to moisture and temperature changes. There are various styles of joining the pieces, from board and batton, wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium
Uranium is a chemical element; it has chemical symbol, symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactive decay, radioactively decays, usually by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes of uranium, isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and uranium-235 (which has 143 neutrons). Uranium has the highest atomic weight of the primordial nuclide, primordially occurring elements. Its density is about 70% higher than that of lead and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few Parts-per notation#Parts-per expressions, parts per million in soil, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alum Shale Formation
The Alum Shale Formation (also known as alum schist and alum slate) is a formation of black shale of Miaolingian (Middle Cambrian) to Tremadocian (Lower Ordovician) in age found predominantly in southern Scandinavia. It is shale or clay slate containing pyrite. Decomposition of pyrite by weathering forms sulfuric acid, which acts on potash and alumina constituents to form alum, which often occurs as efflorescences on the rock outcrop. As the formation contains kerogen originated from algae, it is also classified as marinite-type oil shale. At the same time it is rich in aromatic hydrocarbon attributed to post-depositional irradiation damage to saturated hydrocarbons, induced by uranium concentration in the shale. Alum shale also contains enhanced levels of radium as a result of uranium decay. Between 1950 and 1989, Sweden used alum shale for the uranium production. 8502 specimens of trilobite- agnostoid fauna were found in the Furongian strata of this formation in Bornho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic country by both area and population, and is the List of European countries by area, fifth-largest country in Europe. Its capital and largest city is Stockholm. Sweden has a population of 10.6 million, and a low population density of ; 88% of Swedes reside in urban areas. They are mostly in the central and southern half of the country. Sweden's urban areas together cover 1.5% of its land area. Sweden has a diverse Climate of Sweden, climate owing to the length of the country, which ranges from 55th parallel north, 55°N to 69th parallel north, 69°N. Sweden has been inhabited since Prehistoric Sweden, prehistoric times around 12,000 BC. The inhabitants emerged as the Geats () and Swedes (tribe), Swedes (), who formed part of the sea-faring peopl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memmingen
Memmingen (; Swabian German, Swabian: ''Memmenge'') is a town in Swabia (Bavaria), Swabia, Bavaria, Germany. It is the economic, educational and administrative centre of the Danube-Iller region. To the west the town is flanked by the Iller, the river that marks the Baden-Württemberg border. To the north, east and south the town is surrounded by the district of Unterallgäu (Lower Allgäu). With about 42,000 inhabitants, Memmingen is the 5th biggest town in the administrative region of Swabia. The origins of the town go back to the Roman Empire. The old town, with its many courtyards, castles and patricians' houses, palaces and fortifications is one of the best preserved in southern Germany. With good transport links by road, rail and air, it is the transport hub for Swabia, Upper Swabia and Swabia, Central Swabia, and the Allgäu. Due to its proximity to the Allgäu region, Memmingen is often called the Gateway to the Allgäu (''Tor zum Allgäu''). The town motto is ''Memminge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks in World War II, Tanks and Air warfare of World War II, aircraft played major roles, enabling the strategic bombing of cities and delivery of the Atomic bombings of Hiroshima and Nagasaki, first and only nuclear weapons ever used in war. World War II is the List of wars by death toll, deadliest conflict in history, causing World War II casualties, the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Allied-occupied Germany, Germany, Allied-occupied Austria, Austria, Occupation of Japan, Japan, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Institute Of Technology
KTH Royal Institute of Technology (), abbreviated KTH, is a public research university in Stockholm, Sweden. KTH conducts research and education in engineering and technology and is Sweden's largest technical university. Since 2018, KTH consists of five schools with four campuses in and around Stockholm. KTH was established in 1827 as the ''Teknologiska institutet'' (Institute of Technology) and had its roots in the ''Mekaniska skolan'' (School of Mechanics) that was established in 1798 in Stockholm. But the origin of KTH dates back to the predecessor of the ''Mekaniska skolan'', the ''Laboratorium mechanicum'', which was established in 1697 by the Swedish scientist and innovator Christopher Polhem. The ''Laboratorium mechanicum'' combined education technology, a laboratory, and an exhibition space for innovations. In 1877, KTH received its current name, ''Kungliga Tekniska högskolan'' (KTH Royal Institute of Technology). The Swedish king, His Majesty Carl XVI Gustaf, is the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henrik Kreüger
Henrik Kreüger (1882–1953) was born in Kalmar, Sweden, and obtained his M.Sc. in civil engineering in 1904 at the Royal Institute of Technology in Stockholm. After graduating, he worked for the construction company Fritz Söderbergh in Stockholm until 1908, when he went back to the university to work as an employed teacher at the faculty for civil engineering. In parallel he also worked as a consulting engineer for the construction company Kreuger & Toll that started their business in 1908, a couple of months after Ivar Kreuger had returned from America. Henrik Kreüger and Ivar Kreuger formed an affiliate to the US company Trussed Concrete Steel Company in Sweden early 1908, but later Ivar decided to form his own construction company to become independent of the US company. However, Ivar preferred to form this new company (Kreuger & Toll) together with engineer Paul Toll that had several years of practical experience in the construction business. Henrik Kreüger then came ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinyl Siding
Vinyl siding is plastic exterior siding for houses and small apartment buildings, used for decoration and weatherproofing, imitating wood clapboard, batten board and batten or shakes, and used instead of other materials such as aluminum or fiber cement siding. It is an engineered product, manufactured primarily from polyvinyl chloride (PVC) resin. In the UK and New Zealand a similar material is known as uPVC weatherboarding. Approximately 80 percent of its weight is PVC resin, with the remaining 20 percent being ingredients that impart color, opacity, gloss, impact resistance, flexibility, and durability. It is the most commonly installed exterior cladding for residential construction in the United States and Canada. History Vinyl siding was introduced to the exterior market in the late 1950s as a replacement for aluminum siding. It was first produced by an independently owned manufacturing plant called Crane Plastics in Columbus, Ohio. The process was originally done through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
