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Oxide Jacking
The expansive force of rusting, which may be called oxide jacking or rust burst, is a phenomenon that can cause damage to structures made of stone, masonry, concrete or ceramics, and reinforced with metal components. A definition is "the displacement of building elements due to the expansion of iron and steel products as the metal rusts and becomes iron oxide". Corrosion of other metals such as aluminum can also cause oxide jacking. Physical process According to metallurgist Jack Harris, "Oxidation is usually accompanied by a net expansion so that when it occurs in a confined space stresses are generated in the metal component itself or in any surrounding medium such as stone or cement. So much energy is released by oxidation that the stresses generated are of sufficient magnitude to deform or fracture all known materials." As early as 1915, it was recognized that certain modern metal alloys are more susceptible to excessive oxidation when subjected to weathering than other meta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete Spalling Caused By Oxide Jacking At The Herbst Pavilion, Fort Mason Center, San Francisco
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Museum
The British Museum is a public museum dedicated to human history, art and culture located in the Bloomsbury area of London. Its permanent collection of eight million works is among the largest and most comprehensive in existence. It documents the story of human culture from its beginnings to the present.Among the national museums in London, sculpture and decorative and applied art are in the Victoria and Albert Museum; the British Museum houses earlier art, non-Western art, prints and drawings. The National Gallery holds the national collection of Western European art to about 1900, while art of the 20th century on is at Tate Modern. Tate Britain holds British Art from 1500 onwards. Books, manuscripts and many works on paper are in the British Library. There are significant overlaps between the coverage of the various collections. The British Museum was the first public national museum to cover all fields of knowledge. The museum was established in 1753, largely b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notre Dame, Indiana
Notre Dame is a census-designated place and unincorporated community north of the city of South Bend in St. Joseph County, in the U.S. state of Indiana. It includes the campuses of three colleges: the University of Notre Dame, Saint Mary's College, and Holy Cross College. Notre Dame is split between Clay and Portage Townships. As of the 2020 census, its population was 7,234. Demographics Holy Cross religious communities Holy Cross Village at Notre Dame is a retirement community offering continuing care. It is owned by the Brothers of Holy Cross and managed by the Franciscan Sisters of Chicago Service Corporation. Notre Dame is the home of three major headquarters of Holy Cross religious communities. On the campus of Saint Mary's College the Sisters of the Holy Cross have their Congregational Administration. The Holy Cross College campus is the location of the Provincial Offices of two provinces of the Congregation of Holy Cross: the Midwest Province of Brothers and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basilica Of The Sacred Heart, Notre Dame
The Basilica of the Sacred Heart in Notre Dame, Indiana, is a Catholic church on the campus of the University of Notre Dame, also serving as the mother church of the Congregation of Holy Cross (C.S.C.) in the United States. The neo-gothic church has 44 large stained glass windows and murals completed over a 17-year period by the Vatican painter Luigi Gregori. The basilica bell tower is high, making it the tallest university chapel in America. It is a contributing building in Notre Dame's historic district listed on the National Register of Historic Places. With . Map of district included with _History In_1686,_Fr._ |
Handrails
A handrail is a rail that is designed to be grasped by the hand so as to provide safety or support. In Britain, handrails are referred to as banisters. Handrails are usually used to provide support for body or to hold clothings in a bathroom or similar areas. Handrails are commonly used while ascending or descending stairways and escalators in order to prevent injurious falls or to hold necessities. Handrails are typically supported by balusters or attached to walls. Similar items not covered in this article include bathroom handrails—which help to prevent falls on slippery, wet floors—other grab bars, used, for instance, in ships' galleys, and barres, which serve as training aids for ballet dancers. Guard rails and balustrades line drop-offs and other dangerous areas, keeping people and vehicles out. British specifications British Standard and British Standard Code of Practice are harmonized to European Normal (EN) series. Handrail height is set between . US specif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acropolis Of Athens
The Acropolis of Athens is an ancient citadel located on a rocky outcrop above the city of Athens and contains the remains of several ancient buildings of great architectural and historical significance, the most famous being the Parthenon. The word '' acropolis'' is from the Greek words (''akron'', "highest point, extremity") and (''polis'', "city"). The term acropolis is generic and there are many other acropoleis in Greece. During ancient times the Acropolis of Athens was known also more properly as Cecropia, after the legendary serpent-man, Cecrops, the supposed first Athenian king. While there is evidence that the hill was inhabited as far back as the fourth millennium BC, it was Pericles (c. 495–429 BC) in the fifth century BC who coordinated the construction of the buildings whose present remains are the site's most important ones, including the Parthenon, the Propylaea, the Erechtheion and the Temple of Athena Nike. The Parthenon and the other buildings were serio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venice
Venice ( ; it, Venezia ; vec, Venesia or ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 small islands that are separated by canals and linked by over 400 bridges. The islands are in the shallow Venetian Lagoon, an enclosed bay lying between the mouths of the Po River, Po and the Piave River, Piave rivers (more exactly between the Brenta (river), Brenta and the Sile (river), Sile). In 2020, around 258,685 people resided in greater Venice or the ''Comune di Venezia'', of whom around 55,000 live in the historical island city of Venice (''centro storico'') and the rest on the mainland (''terraferma''). Together with the cities of Padua, Italy, Padua and Treviso, Italy, Treviso, Venice is included in the Padua-Treviso-Venice Metropolitan Area (PATREVE), which is considered a statistical metropolitan area, with a total population of 2.6 million. The name is derived from the ancient Adri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horses Of Saint Mark
The Horses of Saint Mark ( it, Cavalli di San Marco), also known as the Triumphal Quadriga or Horses of the Hippodrome of Constantinople, is a set of bronze statues of four horses, originally part of a monument depicting a quadriga (a four-horse carriage used for chariot racing). The horses were placed on the facade, on the loggia above the porch, of St Mark's Basilica in Venice, northern Italy after the sack and looting of Constantinople in 1204. They remained there until looted by Napoleon in 1797 but were returned in 1815. The sculptures have been removed from the facade and placed in the interior of St Mark's for conservation purposes, with replicas in their position on the loggia. Origins The sculptures date from classical antiquity. A date in the 2nd or 3rd century AD is considered likely; the famous Equestrian Statue of Marcus Aurelius in Rome (c. 175 AD) provides a point of comparison. However, some scholars do claim the naturalistic rendering of the animals and technica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London
London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as '' Londinium'' and retains its medieval boundaries.See also: Independent city § National capitals The City of Westminster, to the west of the City of London, has for centuries hosted the national government and parliament. Since the 19th century, the name "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority.The Greater London Authority consists of the Mayor of London and the London Assembly. The London Mayor is distinguished fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackburn Cathedral
Blackburn Cathedral, officially known as the Cathedral Church of Blackburn Saint Mary the Virgin with St Paul, is an Church of England, Anglican (Church of England) cathedral situated in the heart of Blackburn town centre, in Lancashire, England. The cathedral site has been home to a church for over a thousand years and the first stone church was built there in Norman dynasty, Norman times. History With the creation of the Diocese of Blackburn in 1926 (taken from the Anglican Diocese of Manchester, Diocese of Manchester), the impressive parish church of St Mary the Virgin was raised to cathedral status. The church, which was built in 1826 and designed by architect John Palmer (architect), John Palmer, now forms the cathedral's nave. It replaced the parish church that was demolished in 1819–1820. In the early 1930s, fundraising began to enlarge the cathedral so that the building complemented its newfound importance. By 1938, enough money had been raised and work began on enlarg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winchester Cathedral
The Cathedral Church of the Holy Trinity,Historic England. "Cathedral Church of the Holy Trinity (1095509)". ''National Heritage List for England''. Retrieved 8 September 2014. Saint Peter, Saint Paul and Saint Swithun, commonly known as Winchester Cathedral, is the cathedral of the city of Winchester, England, and is among the largest of its kind in Northern Europe. The cathedral is the seat of the Bishop of Winchester and is the mother church for the ancient Diocese of Winchester. It is run by a dean and chapter, under the Dean of Winchester. The cathedral as it stands today was built from 1079 to 1532 and is dedicated to numerous saints, most notably Swithun of Winchester. It has a very long and very wide nave in the Perpendicular Gothic style, an Early English retrochoir, and Norman transepts and tower. With an overall length of , it is the longest medieval cathedral in the world, and only surpassed by the more recent churches of St Peter's Basilica in Rome, Basilica of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
King's Lynn
King's Lynn, known until 1537 as Bishop's Lynn and colloquially as Lynn, is a port and market town in the borough of King's Lynn and West Norfolk in the county of Norfolk, England. It is located north of London, north-east of Peterborough, north-north-east of Cambridge and west of Norwich. History Toponymy The etymology of King's Lynn is uncertain. The name ''Lynn'' may signify a body of water near the town – the Welsh word means a lake; but the name is plausibly of Anglo-Saxon origin, from ''lean'' meaning a tenure in fee or farm. As the 1085 Domesday Book mentions saltings at Lena (Lynn), an area of partitioned pools may have existed there at the time. Other places with Lynn in the name include Dublin, Ireland. An Dubh Linn....the Black Pool. The presence of salt, which was relatively rare and expensive in the early medieval period, may have added to the interest of Herbert de Losinga and other prominent Normans in the modest parish. The town was named ''Len '' (Bis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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