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Cast Stone
Cast stone or reconstructed stone is a refined artificial stone, a form of precast concrete. It is used as a building material to simulate natural-cut masonry in architectural features such as facings and trim; for statuary; and for garden ornaments. It may replace natural building stones including limestone, brownstone, sandstone, bluestone, granite, slate, and travertine. Cast stone can be made from white or grey cements, manufactured or natural sands, crushed stone or natural gravels, and can be coloured with mineral colouring pigments. It is cheaper and more uniform than natural stone, and allows transporting the bulk materials and casting near the place of use, which is cheaper than transporting and carving very large pieces of stone. History The earliest known use of cast stone was in the Cité de Carcassonne, France, in about 1138. It was first used extensively in London in the late 19th century and gained widespread acceptance in America in the 1920s. One of the ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coade Stone
Coade stone or ''Lithodipyra'' or ''Lithodipra'' () is stoneware that was often described as an artificial stone in the late 18th and early 19th centuries. It was used for moulding neoclassical architecture, neoclassical statues, architectural decorations and garden ornaments of the highest quality that remain virtually weatherproof today. Coade stone features were produced Royal Warrant of Appointment (United Kingdom), by appointment to George III of the United Kingdom, George III and the George IV of the United Kingdom, Prince Regent for St George's Chapel, Windsor; Royal Pavilion, The Royal Pavilion, Brighton; Carlton House, London; the Royal Naval College, Greenwich; and refurbishment of Buckingham Palace in the 1820s. Coade stone was prized by the most important architects such as: John Nash (architect), John Nash-Buckingham Palace; Sir John Soane-Bank of England; Robert Adam-Kenwood House; and James Wyatt-Radcliffe Observatory. The product (originally known ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BSI Group
The British Standards Institution (BSI) is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies standards certification services for business and personnel. History BSI was founded as the Engineering Standards Committee in London in 1901.Robert C McWilliam. BSI: The first hundred years. 2001. Thanet Press. London It subsequently extended its standardization work and became the British Engineering Standards Association in 1918, adopting the name British Standards Institution in 1931 after receiving a Royal Charter in 1929. In 1998 a revision of the Charter enabled the organization to diversify and acquire other businesses, and the trading name was changed to BSI Group. The Group now operates in 195 countries. The core business remains standards and standards related services, although the majority of the Group's revenue comes from management systems assessment and certification work. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASTM International
ASTM International, formerly known as American Society for Testing and Materials, is a standards organization that develops and publishes voluntary consensus technical international standards for a wide range of materials, products, systems and services. Some 12,575 apply globally. The headquarters is in West Conshohocken, Pennsylvania, about northwest of Philadelphia. It was founded in 1902 as the American Section of the International Association for Testing Materials. In addition to its traditional standards work, ASTM operates several global initiatives advancing additive manufacturing, advanced manufacturing, and emerging technologies, including the Additive Manufacturing Center of Excellence (AM CoE), the acquisition oWohlers Associatesfor market intelligence and advisory services, and the National Institute of Standards and Technology, NIST-funded Standardization Center of Excellence (SCOE). History In 1898, a group of scientists and engineers, led by chemist, industry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid over time. It is the second-most-used substance (after water), the most–widely used building material, and the most-manufactured material in the world. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that can be poured and molded into shape. The cement reacts with the water through a process called hydration, which hardens it after several hours to form a solid matrix that binds the materials together into a durable stone-like material with various uses. This time allows concrete to not only be cast in forms, but also to have a variety of tooled processes performed. The hydration process is exothermic, which means that ambient temperature plays a significant role in how long it takes concrete to set. Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictionary Of British Sculptors 1660–1851
The ''Dictionary of British Sculptors 1660–1851'' is a biographical dictionary of sculptors active in Britain in the period between the Restoration of Charles II and the Great Exhibition of 1851. It has appeared in three editions, published in 1953, 1968, and 2009 respectively: the 2009 edition adopts the amended title ''A Biographical Dictionary of Sculptors in Britain 1660–1851''. The first two editions were researched and written by Rupert Forbes Gunnis, and were often known simply as Gunnis. The third edition was edited by Ingrid Roscoe. The book is a major scholarly work, which rapidly established itself as a standard authority on British sculptors and sculpture. First edition The ''Dictionary'' was conceived and written by Rupert Forbes Gunnis (1899–1965), a civil servant in the British colonial Government of Cyprus, and later curator of Tunbridge Wells Museum. He originally hoped to write "a complete dictionary of British sculpture from the earliest times until the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rupert Gunnis
Rupert Forbes Gunnis (11 March 1899 – 31 July 1965) was an English collector and historian of British sculpture. He is best known for his ''Dictionary of British Sculptors 1660–1851'', which "revolutionized the study of British sculpture, providing the foundation for all later studies on the subject".Tim Knox‘Gunnis, Rupert Forbes (1899–1965)’ ''Oxford Dictionary of National Biography'', Oxford University Press, 2004 , accessed 17 Oct 2010 Life Born in Cadogan Square, London, Gunnis was educated at Eton College. In 1923 he entered the Colonial Service, serving as private secretary to the Governor of Uganda (1923–1926) and then the Governor of Cyprus, Sir Ronald Storrs (November 1926 – June 1932). From 1932 to 1935 he worked as Inspector of Antiquities for the Cyprus Museum. Although Gunnis was a government official he acquired and sold antiquities illegally. In 1936 he was appointed as a member of the Antiquities Advisory board, and published his important book ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Air
Sea air has traditionally been thought to offer health benefits associated with its unique odor, which is caused by dimethyl sulfide, released by microbes. Salts generally do not dissolve in air, but can be carried by sea spray in the form of particulate matter. In the early 19th century, a lower prevalence of disease in coastal regions or islands was attributed to the sea air. Such medical beliefs were translated into the literature of Jane Austen and other authors. Victorians mistakenly attributed the odor of sea air to ozone. Later that century, such beliefs led to the establishment of seaside resorts for the treatment of tuberculosis, with medical beliefs of its efficacy continuing into the 20th century. However, the quality of sea air was often degraded by pollution Pollution is the introduction of contaminants into the natural environment that cause harm. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indurate
In materials science, friability ( ), the condition of being friable, describes the tendency of a solid substance to break into smaller pieces under stress or contact, especially by rubbing. The opposite of friable is indurate. Substances that are designated hazardous, such as asbestos or crystalline silica, are often said to be friable if small particles are easily dislodged and become airborne, and hence respirable (able to enter human lungs), thereby posing a health hazard. Tougher substances, such as concrete, may also be mechanically ground down and reduced to finely divided mineral dust. However, such substances are not generally considered friable because of the degree of difficulty involved in breaking the substance's chemical bonds through mechanical means. Some substances, such as polyurethane foams, show an increase in friability with exposure to ultraviolet radiation, as in sunlight. Friable is sometimes used metaphorically to describe "brittle" personalities who ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sodium Silicate
Sodium silicate is a generic name for chemical compounds with the formula or ·, such as sodium metasilicate (), sodium orthosilicate (), and sodium pyrosilicate (). The anions are often polymeric. These compounds are generally colorless transparent solids or white powders, and soluble in water in various amounts. Sodium silicate is also the technical and common name for a mixture of such compounds, chiefly the metasilicate, also called waterglass, water glass, or liquid glass. The product has a wide variety of uses, including the formulation of cements, coatings, passive fire protection, textile and lumber processing, manufacture of refractory ceramics, as adhesives, and in the production of silica gel. The commercial product, available in water solution or in solid form, is often greenish or blue owing to the presence of iron-containing impurities. In industry, the various grades of sodium silicate are characterized by their SiO2:Na2O weight ratio (which can be converted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portland Cement
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar (masonry), mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone. It is a fine powder (substance), powder, produced by heating limestone and clay minerals in a kiln to form Clinker (cement), clinker, and then #Cement grinding, grinding the clinker with the addition of several percent (often around 5%) gypsum. Several types of portland cement are available. The most common, historically called ordinary portland cement (OPC), is grey, but white portland cement is also available. The cement was so named by Joseph Aspdin, who obtained a patent for it in 1824, because, once hardened, it resembled the fine, pale limestone known as Portland stone, quarried from the windswept cliffs of the Isle of Portland in Dorset. Portland stone was p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
