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Limekiln
A lime kiln is a kiln used for the calcination of limestone ( calcium carbonate) to produce the form of lime called quicklime (calcium oxide). The chemical equation for this reaction is : CaCO3 + heat → CaO + CO2 This reaction can take place at anywhere above 840 °C (1544 °F), but is generally considered to occur at 900 °C(1655 °F) (at which temperature the partial pressure of CO2 is 1 atmosphere), but a temperature around 1000 °C (1832 °F) (at which temperature the partial pressure of CO2 is 3.8 atmospheres) is usually used to make the reaction proceed quickly.Parkes, G.D. and Mellor, J.W. (1939). ''Mellor's Modern Inorganic Chemistry'' London: Longmans, Green and Co. Excessive temperature is avoided because it produces unreactive, "dead-burned" lime. Slaked lime (calcium hydroxide) can be formed by mixing quicklime with water. Early lime use Because it is so readily made by heating limestone, lime must have been known from the earlies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annery Kiln
Annery kiln is a former limekiln of the estate of Annery, in the parish of Monkleigh, North Devon. It is situated on the left bank of the River Torridge near Half-Penny Bridge, built in 1835,Scrutton, Sue, Lord Rolle's Canal, Great Torrington, 2006, p. 23. which connects the parishes of Monkleigh and Weare Giffard. Running by it today is A386 road from Bideford to Great Torrington. Weare Giffard is the start of the tidal section of the River Torridge, and thus the kiln was sited here to import by river raw materials for the kiln, the product of which was lime fertiliser for use on inland agricultural fields. The old lime kiln is thus situated between the River Torridge and the now filled-in Rolle Canal built ''circa'' 1827Minchinton, Walter (1974), ''Devon at work: Past and Present.'' Pub. David & Charles; Newton Abbot. . P. 82. and railway that ran formerly from Bideford to Torrington, opened in 1872 and closed in 1966. The old trackbed now forms a stretch of the Tarka ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lime Plant, Wyoming
Lime commonly refers to: * Lime (fruit), a green citrus fruit * Lime (material), inorganic materials containing calcium, usually calcium oxide or calcium hydroxide * Lime (color), a color between yellow and green Lime may also refer to: Botany * Australian lime, a species of ''Citrus'' that are native to Australia and Papua New Guinea * Key lime, a citrus hybrid with a spherical fruit * Persian lime, a citrus fruit species of hybrid origin * ''Tilia'', a genus of trees known in Britain as lime trees, lime-wood, basswood, or linden * Wild lime or ''Zanthoxylum fagara'', a green fruit native to the Americas Chemistry * Agricultural lime, a soil additive containing calcium carbonate and other ingredients * Birdlime, a sticky substance spread on branches to trap small birds * Calcium hydroxide, a.k.a. slaked lime, slack lime, limewater, pickling lime or hydrated lime ** Hydraulic lime, used to make lime mortar ** Limewater, saturated calcium hydroxide solution * Calcium oxide, a.k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortar (masonry)
Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colors or patterns to masonry walls. In its broadest sense, mortar includes pitch, asphalt, and soft mud or clay, as those used between mud bricks, as well as cement mortar. The word "mortar" comes from Old French ''mortier'', "builder's mortar, plaster; bowl for mixing." (13c.). Cement mortar becomes hard when it cures, resulting in a rigid aggregate structure; however, the mortar functions as a weaker component than the building blocks and serves as the sacrificial element in the masonry, because mortar is easier and less expensive to repair than the building blocks. Bricklayers typically make mortars using a mixture of sand, a binder, and water. The most common binder since the early 20th century is Portland cement, but the ancient binder lim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal (pavement)
A gravel road is a type of unpaved road surfaced with gravel that has been brought to the site from a quarry or stream bed. They are common in less-developed nations, and also in the rural areas of developed nations such as Canada and the United States. In New Zealand, and other Commonwealth countries, they may be known as metal roads. They may be referred to as "dirt roads" in common speech, but that term is used more for unimproved roads with no surface material added. If well constructed and maintained, a gravel road is an all-weather road. Characteristics Construction Compared to sealed roads, which require large machinery to work and pour concrete or to lay and smooth a bitumen-based surface, gravel roads are easy and cheap to build. However, compared to dirt roads, all-weather gravel highways are quite expensive to build, as they require front loaders, dump trucks, graders, and roadrollers to provide a base course of compacted earth or other material, sometimes macada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Torridge
The River Torridge is a river in Devon in England; it rises near Meddon. The river describes a long loop through Devon farming country where its tributaries the Lew and Okement join before meeting the Taw at Appledore and flowing into the Bristol Channel. The river is spate dependent and often flows between wooded banks which can be steep. The Torridge local government district is named after the river. It was the home of Tarka the Otter in Henry Williamson's book. Route The river rises close to the border with Cornwall (north of the source of the River Tamar). Its two primary sources are Seckington Water, which rises near Baxworthy Cross, and Clifford Water, the longer of the two, which rises alongside the A39 at Higher Clovelly. These run south and join to form the Torridge at Huddisford. It then flows generally east, passing between East Putford and West Putford, and near Bradford it is joined by the River Waldon, then heads east past Black Torrington and Sheepwash. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rolle Canal
The Rolle Canal (or Torrington Canal) in north Devon, England, extends from its mouth into the River Torridge at Landcross 6 miles southwards to the industrial mills and corn-mills at Town Mills, Rosemoor, Great TorringtonLost canals and Waterways of Britain ''Ronald Russell'' page 96 and beyond to Healand Docks and weir on the Torridge, where survive the ruins of Lord Rolle's limekilns, upstream of today's Rosemoor Garden. Town Mills were built by Lord Rolle and were powered by a stream which flowed past his seat of Stevenstone to the east of Great Torrington and also supplied water to the canal. Rosemoor and North and South Healand farms were part of Lord Rolle's Stevenstone estate on the east bank of the Torridge. Description The canal comprises a sea lock at Landcross, a 60-foot inclined plane at Weare Giffard and an aqueduct of five arches over the River Torridge at Beam.''Industrial Archaeology'' Aids to recording (6) page 76 At the terminus of the canal at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Torrington
Great Torrington (often abbreviated to Torrington, though the villages of Little Torrington and Black Torrington are situated in the same region) is a market town in Devon, England. Parts of it are sited on high ground with steep drops down to the River Torridge below, with the lower-lying parts of the town prone to occasional flooding. Torrington is in the centre of Tarka Country, a landscape captured by Henry Williamson in his novel ''Tarka the Otter'' in 1927. Great Torrington has one of the most active volunteering communities in the United Kingdom. In July 2019, Great Torrington was reported to be the healthiest place to live in Britain. Researchers from the University of Liverpool found that the area had low levels of pollution, good access to green space and health services, along with few retail outlets. History There were Iron Age and medieval castles and forts in Torrington, located on the Castle Hill. Great Torrington had strategic significance in the English ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
England
England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain, which lies in the North Atlantic, and includes over 100 smaller islands, such as the Isles of Scilly and the Isle of Wight. The area now called England was first inhabited by modern humans during the Upper Paleolithic period, but takes its name from the Angles, a Germanic tribe deriving its name from the Anglia peninsula, who settled during the 5th and 6th centuries. England became a unified state in the 10th century and has had a significant cultural and legal impact on the wider world since the Age of Discovery, which began during the 15th century. The English language, the Anglican Church, and Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devon
Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devon is a coastal county with cliffs and sandy beaches. Home to the largest open space in southern England, Dartmoor (), the county is predominately rural and has a relatively low population density for an English county. The county is bordered by Somerset to the north east, Dorset to the east, and Cornwall to the west. The county is split into the non-metropolitan districts of East Devon, Mid Devon, North Devon, South Hams, Teignbridge, Torridge, West Devon, Exeter, and the unitary authority areas of Plymouth, and Torbay. Combined as a ceremonial county, Devon's area is and its population is about 1.2 million. Devon derives its name from Dumnonia (the shift from ''m'' to ''v'' is a typical Celtic consonant shift). During the Briti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loss On Ignition
Loss on ignition (LOI) is a test used in inorganic analytical chemistry and soil science, particularly in the analysis of minerals and the chemical makeup of soil. It consists of strongly heating ( "igniting") a sample of the material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change. This may be done in air, or in some other reactive or inert atmosphere. The simple test typically consists of placing a few grams of the material in a tared, pre-ignited crucible and determining its mass, placing it in a temperature-controlled furnace for a set time, cooling it in a controlled (e.g. water-free, CO2-free) atmosphere, and redetermining the mass. The process may be repeated to show that mass-change is complete. A variant of the test in which mass-change is continually monitored as the temperature is changed, is thermogravimetry. Theory The loss on ignition is reported as part of an elemental or oxide analysis of a mineral. The volatile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tonne
The tonne ( or ; symbol: t) is a unit of mass equal to 1000 kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton to distinguish it from the non-metric units of the short ton ( United States customary units), and the long ton ( British imperial units). It is equivalent to approximately 2204.6 pounds, 1.102 short tons, and 0.984 long tons. The official SI unit is the megagram (symbol: Mg), a less common way to express the same mass. Symbol and abbreviations The BIPM symbol for the tonne is t, adopted at the same time as the unit in 1879.Table 6 . BIPM. Retrieved on 2011-07-10. Its use is also official for the metric ton in the United States, having been adopted by the United States |
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