Arizona Concrete Essay

1319 words - 5 pages

According to the Mine Faculty at the University of Arizona, cement is manufactured primarily from suitable limestone and shale rocks. Arizona had two dry-process cement plants in 1969, namely the Arizona Portland Cement Company plant in Pima County, near Tucson, and the American Cement Corporation plant at Clarkdale, in Yavapai County (52-53).The use of cementing materials goes back to the ancient Egyptians and Romans, but the invention of modern portland cement is usually attributed to Joseph Aspdin, a builder in Leeds, England, who obtained a patent for it in 1824. Currently, the annual world production of portland cement is around 700 million metric tons (Danbury).Many people use the words concrete and cement interchangeably, but they=re not. Concrete is to cement as a cake is to flour. Concrete is a mixture of ingredients that includes cement but contains other ingredients also (Day 6-7).Portland cement is produced by pulverizing clinker consisting essentially of hydraulic calcium silicates along with some calcium aluminates and calcium aluminoferrites and usually containing one or more forms of calcium sulfate (gypsum) as an interground addition. Materials used in the manufacture of portland cement must contain appropriate proportions of calcium oxide, silica, alumina, and iron oxide components. During manufacture, analyses of all materials are made frequently to ensure a uniformly high quality cement.Selected raw materials are crushed, milled, and proportioned in such a way that the resulting mixture has the desired chemical composition. The raw materials are generally a mixture of calcareous (calcium oxide) material, such as limestone, chalk or shells, and an argillaceous (silica and alumina) material such as clay, shale, or blast-furnace slag. Either a dry or a wet process is used. In the dry process, grinding and blending operations are done with dry materials. In the wet process, the grinding and blending are done with the materials in slurry form. In other respects, the dry and wet processes are very much alike.After blending, the ground raw material is fed into the upper end of a kiln. The raw mix passes through the kiln at a rate controlled by the slope and rotational speed of the kiln. Burning fuel (powdered coal, oil, or gas) is forced into the lower end of the kiln where temperatures of 2600°F to 3000°F change the raw material chemically into cement clinker, grayish-black pellets about the size of 1/2-in.-diameter marbles.The clinker is cooled and then pulverized. During this operation a small amount of gypsum is added to regulate the setting time of the cement. The clinker is ground so fine that nearly all of it passes through a No. 200 mesh (75 micron) sieve with 40,000 openings per square inch. This extremely fin gray powder is portland cement (Kosmatka and Panarese 12-15).Dany Seymore of Show Low Ready Mix said that the cement used by Show Low Ready Mix is trucked in by Apex Freight Company and comes from the cement...

Find Another Essay On Arizona Concrete

Create a problem/opportunity statement Essay

609 words - 2 pages office, in order to make appointments for when they arrive in Arizona.2. Develop constructs of the problem/opportunity (Refer to Chapter Two of the e-text, Business Research Methods).A construct is an image or abstract idea specifically invented for a given research and/or theory-building purpose. We build constructs by combining the simpler, more concrete concepts, especially when the idea or image we intend to convey is not subject to direct

Hoover Dam Essay

1203 words - 5 pages Lying in Black Canyon is the monumental structure known as Hoover Dam. Also known as Boulder Dam, Hoover Dam was built from 1931 to 1936. Frank Crowe was the head director of the building. The dam was built to irrigate the dry desert in the south west United States. The site of Hoover Dam is visited by millions of people annually and will continue to provide energy to many cities. In 1922, a commission was formed between Arizona, California

Hoover Dam

1577 words - 6 pages companies combined to form Six Companies Inc. (¡§1936: Hoover¡¨). In order to support the demand of the materials for the construction of the dam, steel and aggregate plants were also created (¡§Dam one of¡¨). The railway set up before construction, as well as dump trucks were used to haul these materials and other materials to the dam site (Hernan 22).      The arch-gravity (The Hoover Dam) Hoover Dam consists mostly of concrete; some 3.25

Frank Lloyd Wright

513 words - 2 pages techniques for architectural things, such as the use of precast concrete blocks reinforced by steel rods. He also introduced numerous innovations including air conditioning, indirect lighting and panel heating. The Larkin Building in Buffalo, New York, which he designed in 1904, was the first office building to utilize air conditioning, double glass windows, and all glass doors. He also designed the huge Imperial Hotel in Tokyo, constructed to

The Hoover Dam

1331 words - 5 pages The Hoover Dam Out in the middle of no where, an hour drive away from Las Vegas, NV lies one of the biggest dams and power plants in the world. Built in the heart of the depression, it serves as more than just a barrier from water to pass through. The concrete poured into the walls of Hoover Dam, are made by the sweat and blood of hundreds of Americans who were looking to save themselves, and their families

Brief report: measuring the effectiveness of teaching social thinking to children with asperger syndrome (AS) and high functioning Autism (HFA). Journal of Autism & Developmental Disorders

1074 words - 4 pages syndrome or High Functioning Autism. This study is used to examine the effectiveness and generalizability of the social cognitive approach (Social Thinking) in children diagnosed with Asperger syndrome or High Functioning Autism.These six male children have a current diagnosis of Asperger syndrome or High Functioning Autism and were recruited through the Tucson Alliance for Autism and the University of Arizona Grunewald-Blitz Clinic for Children with

Piaget's Theory of Cognitive Development

1768 words - 7 pages development evolves naturally throughout four stages. To help individuals grasp his idea of Cognitive Development, Jean Piaget came up with four stages. Piaget’s stages include: Sensorimoter, Preoperational, Concrete Operations, and Formal Operations. Sensorimoter (stage one) The Sensorimoter stage focuses on infants to children 2 years of age. As the stage name implies, infants use their motor and sensor abilities to help them understand the

The Public-Private Prison Debate

2472 words - 10 pages , L. Beaty’s article in The Case Journal, and R. Culp’s article in the Criminal Justice Policy Review. In Gaes’s article, his problem with the decision to transfer prisons into private hands is the lack of concrete evidence whether the concept is actually a means of savings or not. His point is that the studies that have been done bear completely different results, causing a discrepancy about actual savings. His example illustrates two different

Hoover Dam

1922 words - 8 pages Hoover Dam The Hoover Dam, built over sixty years ago, still stands today as one of the most outstanding achievements in civil engineering. “Construction on the Hoover Dam began September 30, 1930. The last concrete was poured in 1935 (Facts)”. The Hoover Dam, often called the “Boulder Dam” because the initial location was at Boulder Canyon about ten miles north up river from where it is located now at Black Canyon. The name “Boulder Dam

Style and Contemporary Designs as a Result of Frank Lloyd Wright

1234 words - 5 pages time the source beingelectrical. Thus he built Taliesin III. The winters were too extreme for thefamily. Therefore, Frank moved his family to Arizona. In Arizona he builtTaliesin West. (Rattenbury, 18)On April 9, 1959, Frank died in his Arizona home. He never did retire though. Hewas buried at the graveyard of his first building, the Unity Chapel. In 1984,Olivanna Wright died, and as her last wish she wanted Frank cremated and placednext to her

The Causes and Effects of Pearl Harbor This essay describes the important events that led to the Pearl Harbor attack and it describes the results of the attack.

875 words - 4 pages . Today a white concrete and steel edifice covers the place where the Arizona battleship sunk. It is a national memorial of the sad and painful event. Pearl Harbor continues to be a naval base for the U.S. The memory of this tragic event lives on forever.

Similar Essays

Arizona Concrete Essay

4322 words - 17 pages of modern life, and each style reflects, questions, or analyses some aspects of contemporary society."Through painting, the artist expresses ideas and emotions, as well as a version of the reality he or she perceives, in a two dimensional visual form."(cd rom) Some artists paint concrete forms with which viewers are generally familiar with and some try to create entirely abstract relationships. The way a painting is constructed does not change

Snow On Arizona Snow Bowl? Essay

1960 words - 8 pages Snow on Arizona SnowBowl? Works Cited Missing “A typical Ski season at the Arizona Snow-Bowl lasts from December to Easter” (Arizona SnowBowl Upgrade proposed Action, September 2002, p.2). The Arizona Snow-Bowl, which is located in the San Francisco Peaks, seven miles outside of Flagstaff, Arizona was only open for four days last year! Alarming? Yes, this is why the Arizona Snow bowl has released a fool proof plan, which

Immigration Reform's Domino Effect Essay

1639 words - 7 pages The actions made in today’s societies across the country not only affect those situations immediately at hand, but also those for generations to come. This paper will be delving into immigration reform in Arizona, and more specifically the negative effects that the border surge has had on the socio-economic status of the Grand Canyon state. The motivation for choosing this topic comes from the time spent personally living in Arizona for 12

Frank Lloyd Wright Essay

949 words - 4 pages buildings and churches, a filling station and a synagogue, a beer garden and an art museum. Frank was born June 8, 1867, in Richland, Wisconsin and died in Phoenix, Arizona, on April 9, 1959, at the age of 91. His Father, a musician, abandoned the family in 1885. He grew up under the leadership of his mother, Anna, and his aunts and uncles on a farm near spring Green, Wisconsin. When he entered the University of Wisconsin in 1884 his interest