Various Laboratory Tests on Cement free essay sample

Initial and Final Setting Time of Cement FINENESS OF CEMENT: We need to determine the fineness of cement by dry sieving as per IS: 4031 (Part 1) – 1996. The principle of this is that we determine the proportion of cement whose grain size is larger than specified mesh size. Apparatus: The apparatus used are ) 75Â µm IS Sieve ii) Balance capable of weighing 10g to the nearest 10mg iii) A nylon or pure bristle brush, preferably with 25 to 40mm iv) bristle, for cleaning the sieve Figure No. Sieve No. 200 Procedure to determine fineness of cement: i) Weigh approximately 10g of cement to the nearest 0. 01g and place it on the sieve. Agitate the sieve by swirling, planetary and linear movements, until no more fine material passes through it. iii) Weigh the residue and express its mass as a percentage R1,of the quantity first placed on the sieve to the nearest 0. 1 percent. v) Gently brush all the fine material off the base of the sieve. We will write a custom essay sample on Various Laboratory Tests on Cement or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page v) Repeat the whole procedure using a fresh 10g sample to obtain R2. The apparatus for conducting the Le-Chatelier test should conform to IS: 5514 – 1969 Balance, whose permissible variation at a load of 1000g should be +1. 0g and Water bath. Procedure to determine soundness of cement i) Place the mould on a glass sheet and fill it with the cement paste formed by gauging cement with 0. 78 times the water required to give a paste of standard consistency. ii) Cover the mould with another piece of glass sheet, place a small weight on this covering glass sheet and immediately submerge the whole assembly in water at a temperature of 27 Â ± 2oC and keep it there for 24hrs. To do so we need Vicat apparatus conforming to IS: 5513 – 1976, Balance, whose permissible variation at a load of 1000g should be +1. 0g, Gauging trowel conforming to IS: 10086 – 1982. Procedure to determine initial and final setting time of cement : i) Prepare a cement paste by gauging the cement with 0. 85 times the water required to give a paste of standard consistency. ii) Start a stop-watch, the moment water is added to the cement. iii) Fill the Vicat mould completely with the cement paste gauged as above, the mould resting on a non-porous plate and smooth off the surface of the paste making it level with the top of the mould. The cement block thus prepared in the mould is the test block. Place the test block under the rod bearing the needle. Lower the needle gently in order to make contact with the surface of the cement paste and release quickly, allowing it to penetrate the test block. Repeat the procedure till the needle fails to pierce the test block to a point 5. 0 Â ± 0. 5mm measured from the bottom of the mould. The time period elapsing between the time, water is added to the cement and the time, the needle fails to pierce the test block by 5. 0 Â ± 0. mm measured from the bottom of the mould, is the initial setting time.

Black Death

A common misconception held by many is that there was only one single outbreak of Black Death. Unfortunately, the worst effect Black Death had was its capability of reoccurring again, and again, and again. In some cases it was able to spread through out all of Europe. Yet, the first outbreak of Black Death was the widest spread and the most devastating of them all. In late October of 1347 the Genoese fleet entered the harbor of Messina. All crew men were either dead or on the verge of death. The sickness was clinging to their very bones(Gottfried1). Upon arrival at Messina Harbor the Harbor Master enforced a strict quarantine on the crew, fearing anyone who only spoke to them would be seized by a mortal illness and in no manor could evade death. The infection would spread to everyone who had any contact with the diseased (Knox4). This was one of the first accounts of the plague. Unbeknownst to many at the time, human to human contact was not the primary factor aiding the spread of the plague. Fleas and rats were. In as little as six months of the fleets arrival in the harbor half of the surrounding population had either died or fled from the plague. This outbreak was one of thousands of what present day cultural has come to know as Black Death. The original origin of Black Death is not known. In the late 1320s Black Death appeared in the Gobi Desert. Yet the virus causing the disease was alive long before then . The spread of the plague and its approach to Europe can be tracked along the lower Volga river in 1345. It then traveled into The Caucasus by 1346, reaching Constatinople by 1347. By the year 1348 thousands of people a day were dying in Alexandria. What exactly is a plague? Websters dictionary defines a plague as any deadly epidemic or disease. Yet, there are three varieties of plague: pneumonic, seoticaemic and, bubonic. The Black Death is class...

Tell Brak - Mesopotamian Capital in Syria

Tell Brak - Mesopotamian Capital in Syria Tell Brak is located in northeastern Syria, on one of the ancient major Mesopotamian routes from the Tigris river valley north to Anatolia, the Euphrates, and the Mediterranean Sea. The tell is one of the largest sites in northern Mesopotamia, covering an area of about 40 hectares and rising to a height of over 40 meters. In its heyday during the Late Chalcolithic period (4th millennium BC), the site covered an area of some 110-160 hectares (270-400 acres), with a population estimate of between 17,000 and 24,000. Structures excavated by Max Mallowan in the 1930s include the Naram-Sin palace (built about 2250 BC), and the Eye Temple, called that because of the presence of eye idols. The most recent excavations, led by Joan Oates at the McDonald Institute at Cambridge University, have re-dated the Eye Temple to ca 3900 BC and identified even older components at the site. Tell Brak is now known to be one of the earliest urban sites in Mesopotamia, and thus the world. Mud Brick Walls at Tell Brak The earliest identified non-residential structure at Tell Brak is what must have been an enormous building, even though only a small portion of the room has been excavated. This building has a massive entrance way with a basalt door-sill and towers on either side. The building has red mud brick walls which are 1.85 meters (6 feet)Â  thick, and even today stand 1.5 m (5 ft)Â  tall. Radiocarbon dates have placed this structure securely between 4400 and 3900 BC. A workshop of craft activities (flint-working, basalt grinding, mollusc shell inlay) has been identified at Tell Brak, as has a large building which contained mass-produced bowls and a unique obsidian and white marble chalice held together with bitumen. A large collection of stamp seals and so-called sling bullets were also recovered here. A feasting hall at Tell Brak contains several very large ​hearths and a quantity of mass-produced plates. Tell Braks Suburbs Surrounding the tell is an extensive zone of settlements covering an area of about 300 hectares, with evidence of use between the Ubaid period of Mesopotamia through the Islamic periods of the mid-first millennium AD. Tell Brak is connected by ceramic and architectural similarities to other sites in Northern Mesopotamia such as Tepe Gawra and Hamoukar. Sources This glossary entry is a part of the About.com guide to Mesopotamia , and the Dictionary of Archaeology. Charles M, Pessin H, and Hald MM. 2010. Tolerating change at Late Chalcolithic Tell Brak: responses of an early urban society to an uncertain climate. Environmental Archaeology 15:183-198. Oates, Joan, Augusta McMahon, Philip Karsgaard, Salam Al Quntar and Jason Ur. 2007. Early Mesopotamian urbanism: A new view from the north. Antiquity 81:585-600. Lawler, Andrew. 2006. North Versus South, Mesopotamian Style. Science 312(5779):1458-1463 Also, see the Tell Brak home page at Cambridge for more information.

A market is efficient with respect to a particular set of information Essay

A market is efficient with respect to a particular set of information if it is impossible to make abnormal profits - Essay Example Second part of the essay contains on a market conclusion about the practical behaviors of stock markets in relation with stock movements. This debate also include the information of the market behavior that in which circumstances an investor can make abnormal profits and in which conditions it is not possible to make abnormal gains and profits. It this part, debate is also made on the question that either market is efficient or not. The last part of this assignment is based on a general conclusion about this study. Topic: A market is efficient with respect to a particular set of information if it is impossible to make abnormal profits by using this set of information to formulate buying and selling decisions. The efficiency of the stock market is based on the efficient market hypothesis. Many investors believe that they can select stock with the help of their forecasting and valuation techniques and can make abnormal profits easily. On the other side the efficiency market hypothesis states that all the stock prices are based on all the accurate information and reflect the full and fair information. This directly means that it is not possible to consistently outperform the market by using any information that the market already knows, except by luck. The idea is that now information is quickly and efficiently incorporated into share prices at any point of time, so that old information cannot be used to judge the future movements. The term "efficient market" was first introduced by in 1965 in a paper by E.F. Fama who suggest that â€Å"in an efficient market, on the average, competition will cause the full effects of new information on intrinsic values to be reflected "instantaneously" in actual prices† For proper understanding of the efficient market hypothesis we must have to aware about the basic market categories. A short summary of these categories are described below Market inefficiency An inefficient form of efficient market is one in which the valu e of the securities is not always an accurate reflection of the available information. In an inefficient market, some stocks will be over priced and other will be underpriced, which means some investor can make excess while other can lose more than warranted by their level of exposure. The logic behind this process is that proper valuation of securities and stocks are depend upon the latest information and in an inefficient market no latest data about the stock and securities are available. So this can directly result into wrong decision about buying or selling any stock. (BORENSTEIN, S., BUSSE, M. R., & KELLOGG, R. (2007). Principal-agent incentives, excess caution, and market inefficiency evidence from utility regulation) Weak form efficiency In a weak form efficient market share prices reflects information about all the past prices movements. This situation directly relates that these past movements do not help in identifying positive trading strategies. (Returns and weak form ef ficiency: betting markets 1984) In these kinds of markets future prices movements cannot be predicted because all the information is available of the past price movements. And any technical analysis cannot help to make a consistent gain on the market. It is stated in a paper by Kendall in 1953 that the prices of shares followed a random walk. I.e. there

The relationship between Human and Nature Dissertation

The relationship between Human and Nature - Dissertation Example The Eastern and Western architecture are largely influenced by the religions dominant in both regions. Western religions, which include Christianity, Judaism, and Islam, as well as Greek and Roman Empire influences, apply their beliefs based on congregated prayer where the community usually participates in praise and other religious rituals (Cooler, n.d). Such practice often calls for space where a congregation can gather and listen to teachings from religious leaders. In effect, a speaker would have to face the followers in order to be seen and heard. The speaker would therefore have to be situated at the front of a space, not at its centre because those behind may not be able to hear him and may not be able to participate fully in the religious activity (Cooler, n.d). A rectangular space with a podium at one end may therefore serve better purposes for worship within the western religious setting. While the circular forms of worship sites as in the formations seen at the Stonehenge, these sites did not last as a main forms of worship sites (Cooler, n.d). Japanese architecture The impact of Japanese architecture to architecture in general is very much significant. It includes both religious and non-religious tones and themes. For a long time, Japanese architecture has mostly been based on Chinese influence (World Translation Center, 2014). However, differences between their styles have been noted throughout the years, with a significant difference being that in Japanese architecture, people usually sat on the floor, with Chinese architecture including chairs to sit on.

Argumentative Essay Essay Example for Free

Argumentative Essay Essay Ever since the war on terror our government continues the abuse of human rights by, always tracking individuals and labeling them, practicing lock downs of cities for when they really need it, and always adding to the list of freedoms there taking away from us. Most people don’t see it as that many people see it still as a war against people that terrorized America. Soon after 9-11 the United States best computers where hard at work beginning a process to find and label terrorist in America and by doing so they invaded everyone’s privacy by constantly scanning emails and texts, voice recognition software on all our phones, Facebook is primarily used to profile people and find more about their personal mind sets and likes. Our cell phones can trigger words that start voice recording software so anyone can listen in on our calls. Right after the Boston bombing the government exercised martial law by having everyone clear the streets and clearing house by house, no one could be outside without being considered a threat, that’s putting people on lockdown and testing out how well it works on big American city’s or towns and to see how well the people listened. One by one our freedoms are being taken away and no one can stop it, it’s part of the new technology and life we will have to grow and live into and our children. Ever since the terrorist act most of our freedoms where taken away right there, and as time goes on and we continue to let our government control us pretty soon we will have no freedoms what so ever and will be under full control as a people. Everyday new and better technology comes out that can help control America one way at a time. The war on terror has contributed to the growing abuse of human rights and no one will do anything to stop it. If we don’t come together as a hole to stop it people will soon be robots living under the control of one ruler or a group of people that decide everything about us.

Gatsbys Pursuit Of The American Dream :: essays research papers

Gatsby's Pursuit of the American Dream The Great Gatsby, a novel by Scott Fitzgerald, is about the American Dream, and the downfall of those who attempt to reach its impossible goals. The attempt to capture the American Dream is used in many novels. This dream is different for different people; but, in The Great Gatsby, for Jay, the dream is that through wealth and power, one can acquire happiness. To get this happiness Jay must reach into the past and relive an old dream; and, in order to do this, he must have wealth and power. The American Dream had always been based on the idea that each person no matter who he or she is can become successful in life by his or her hard work. The dream also brought about the idea of a self-reliant man, a hard worker, making a successful living for him or herself. The Great Gatsby is about what happened to the American Dream in the 1920s, a time period when the many people with newfound wealth and the need to flaunt it had corrupted the dream. The pursuit of the American Dream is the one motivation for accomplishing one's goals, however when combined with wealth the dream becomes nothing more than selfishness. Jay Gatsby, the main character of the story, is one character that longs for the past. Surprisingly, he spends most of his adult life trying to recapture it and, finally, dies in this pursuit. In the past, Gatsby had a love affair with the attractive young Daisy. Knowing he could not marry her because of the difference in their social status, he leaves her to gain wealth to reach her standards. Once he acquires wealth, he moves near to Daisy, "Gatsby bought that house so that Daisy would be just across the bay (p83)," and throws extravagant parties, hoping by chance she might show up at one of them. He, himself, does not attend his parties but watches them from a distance. When this dream doesn't fall into place like he planned, he asks around if anyone knows her. Soon, he meets Nick Carraway, a cousin of Daisy, who agrees to set up a meeting, "He wants to know†¦if you'll invite Daisy to your house some afternoon and then let him come over (p83)." Gatsby's personal dream symbolizes the larger American Dream where all have the opportunity to get what they want.