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Slipform Stonemasonry
Slipform stonemasonry is a method for making a reinforced concrete wall with stone facing in which stones and mortar are built up in courses within reusable slipforms. It is a cross between traditional mortared stone wall and a veneered stone wall. Short forms, up to 60 cm high, are placed on both sides of the wall to serve as a guide for the stone work. The stones are placed inside the forms with the good faces against the form work. Concrete is poured in behind the rocks. Rebar is added for strength, to make a wall that is approximately half reinforced concrete and half stonework Stonemasonry or stonecraft is the creation of buildings, structures, and sculpture using rock (geology), stone as the primary material. Stonemasonry is the craft of shaping and arranging stones, often together with Mortar (masonry), mortar .... The wall can be faced with stone on one side or both sides. After the concrete sets enough to hold the wall together, the forms are "slipped" up to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reinforced Concrete
Reinforced concrete, also called ferroconcrete or ferro-concrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel reinforcing bars (known as rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials. In corrosion engineering terms, when designed correctly, the alkalinity of the concrete protects the steel rebar from corrosion. Description Reinforcing schemes are generally designed to resist tensile stresses in particular regions of the concrete that might cause unacceptable cracking and/or structural failure. Modern reinforced concrete can contain varied reinforcing materials made o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Slipform
Slip forming, continuous poured, continuously formed, or slipform construction is a construction method in which concrete is placed into a form that may be in continuous motion horizontally, or incrementally raised vertically. In horizontal construction, such as roadways and curbs, the weight of the concrete, forms, and any associated machinery is borne by the ground. In vertical construction, such as bridges, towers, buildings, and dams, forms are raised hydraulically in increments, no faster than the most recently poured concrete can set and support the combined weight of the concrete, forms, and machinery, and the pressure of concrete consolidation.Nawy, ''Concrete Construction Engineering Handbook'', 2008, p. 10—33. Slipforming enables continuous, non-interrupted, cast-in-place, cold joint- and seam-free concrete structures that have performance characteristics superior to those of piecewise construction using discrete form elements. Overview Slip forming relies on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stone Wall
Stone walls are a kind of masonry construction that has been used for thousands of years. The first stone walls were constructed by farmers and primitive people by piling loose field stones into a dry stone wall. Later, mortar and plaster were used, especially in the construction of city walls, castles, and other fortifications before and during the Middle Ages. These stone walls are spread throughout the world in different forms. Materials Stone walls are usually made of local materials varying from limestone and flint to granite and sandstone. However, the quality of building stone varies greatly, both in its endurance to weathering, resistance to water penetration and in its ability to be worked into regular shapes before construction. Worked stone is usually known as ashlar, and is often used for corners in stone buildings. Granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feld ... [...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] |
Rebar
Rebar (short for reinforcement bar or reinforcing bar), known when massed as reinforcing steel or steel reinforcement, is a tension device added to concrete to form ''reinforced concrete'' and reinforced masonry structures to strengthen and aid the concrete under tension. Concrete is strong under compression, but has low tensile strength. Rebar usually consists of steel bars which significantly increase the tensile strength of the structure. Rebar surfaces feature a continuous series of ribs, lugs or indentations to promote a better bond with the concrete and reduce the risk of slippage. The most common type of rebar is carbon steel, typically consisting of hot-rolled round bars with deformation patterns embossed into its surface. Steel and concrete have similar coefficients of thermal expansion, so a concrete structural member reinforced with steel will experience minimal differential stress as the temperature changes. Other readily available types of rebar are manufacture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stonework
Stonemasonry or stonecraft is the creation of buildings, structures, and sculpture using rock (geology), stone as the primary material. Stonemasonry is the craft of shaping and arranging stones, often together with Mortar (masonry), mortar and even the ancient lime mortar, to wall or cover formed structures. The basic tools, methods and skills of the banker mason have existed as a trade for thousands of years. It is one of the oldest activities and professions in human history. Many of the long-lasting, ancient Shelter (building), shelters, temples, monuments, artifact (archaeology), artifacts, fortifications, roads, bridges, and entire city, cities were built of stone. Famous works of stonemasonry include Göbekli Tepe, the Egyptian pyramids, the Taj Mahal, Cusco's Incan Wall, Taq-e Bostan, Taqwesan, Easter Island's Moai, statues, Angkor Wat, Borobudur, Tihuanaco, Tenochtitlan, Persepolis, the Parthenon, Stonehenge, the Great Wall of China, the Mesoamerican pyramids, Chart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Flagg
Ernest Flagg (February 6, 1857 – April 10, 1947) was an American architect in the Beaux-Arts style. He was also an advocate for urban reform and architecture's social responsibility. Early life and education Flagg was born in Brooklyn, New York. His father Jared Bradley Flagg was an Episcopal priest and a notable painter. Ernest left school at 15 to work as an office boy on Wall Street. After working with his father and brothers in real estate for a few years, he designed duplex apartment plans in 1880 with the architect Philip Gengembre Hubert, for the co-operative apartment buildings Hubert was known. Cornelius Vanderbilt II, Flagg's cousin through his marriage to Alice Claypoole Gwynne, was impressed by Flagg's work and sent him to study at the École des Beaux-Arts in Paris from 1889–1891, under his patronage. Professional career In 1891, Flagg began his architectural practice in New York, greatly influenced by his knowledge of the French ideas of architectural d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helen Nearing
Helen Knothe Nearing (February 23, 1904 – September 17, 1995) was an American author, advocate of simple living and a lifelong vegetarian. Biography Helen Knothe was born on February 23, 1904, in Ridgewood, New Jersey, the daughter of Frank Knothe, who had a clothing business. She grew up in an economically comfortable family of theosophists Krishnamurti: The Years of Awakening by Mary Lutyens, London: John Murray, 1975. and was a lifelong vegetarian. She graduated from Ridgewood High School and studied the violin internationally. As a young woman, she had a romantic relationship with Jiddu Krishnamurti. She and Scott Nearing started a relationship in 1928 and married nearly 20 years later, on December 12, 1947, when she was 43 and he was 64.Margaret Killinger ''The Good Life of Helen K. Nearing'', 2007. In 1934, the couple left New York City for Winhall in rural Vermont, where they had purchased a rather large forest tract for $2200 and a moderate-sized farm for $250 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scott Nearing
Scott Nearing (August 6, 1883 – August 24, 1983) was an American radical economist, educator, writer, political activist, pacifist, vegetarian and advocate of simple living. Biography Early years Nearing was born in Morris Run, Tioga County, Pennsylvania, the heart of the state's coal country. Nearing's grandfather, Winfield Scott Nearing, had arrived in Tioga County with his family in 1864, at the age of 35, when he accepted a job as a civil and mining engineer. Before the end of the year he had assumed full control of mining operations as the superintendent of the Morris Run Coal Company, a position of authority which he held for the remainder of his working life. An intense, driven man, Scott Nearing's grandfather studied science and nature, practiced gardening and carpentry, and regularly received crates of books from New York City, amassing a large personal library. In his memoirs written late in his life, Scott Nearing would recall his grandfather as one of the four m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stonemasonry
Stonemasonry or stonecraft is the creation of buildings, structures, and sculpture using rock (geology), stone as the primary material. Stonemasonry is the craft of shaping and arranging stones, often together with Mortar (masonry), mortar and even the ancient lime mortar, to wall or cover formed structures. The basic tools, methods and skills of the banker mason have existed as a trade for thousands of years. It is one of the oldest activities and professions in human history. Many of the long-lasting, ancient Shelter (building), shelters, temples, monuments, artifact (archaeology), artifacts, fortifications, roads, bridges, and entire city, cities were built of stone. Famous works of stonemasonry include Göbekli Tepe, the Egyptian pyramids, the Taj Mahal, Cusco's Incan Wall, Taq-e Bostan, Taqwesan, Easter Island's Moai, statues, Angkor Wat, Borobudur, Tihuanaco, Tenochtitlan, Persepolis, the Parthenon, Stonehenge, the Great Wall of China, the Mesoamerican pyramids, Chart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Construction
Construction are processes involved in delivering buildings, infrastructure, industrial facilities, and associated activities through to the end of their life. It typically starts with planning, financing, and design that continues until the asset is built and ready for use. Construction also covers repairs and maintenance work, any works to expand, extend and improve the asset, and its eventual demolition, dismantling or wikt:decommission, decommissioning. The construction industry contributes significantly to many countries' gross domestic products (Gross domestic product, GDP). Global expenditure on construction activities was about $4 trillion in 2012. In 2022, expenditure on the construction industry exceeded $11 trillion a year, equivalent to about 13 percent of global Gross domestic product, GDP. This spending was forecasted to rise to around $14.8 trillion in 2030. The construction industry promotes economic development and brings many non-monetary benefits to many cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
