Lab#2 concrete mix design and compression tests Lab Report

#2 concrete mix design and compression tests - Lab Report Example Concrete quality control is an essential practice to ensure consistency in both the fresh and hardened concrete. Some of the laboratory methods used for concrete quality control include; slump test, compressive strength test and workability tests. The primary objective for this experimental study was to identify the characteristics exhibited by concrete materials and to familiarize with the commonly used laboratory specimen manufacturing and testing methods. In design and quality control of concrete, the most specified concrete property is strength. This can be attributed to the fact that testing methods available are relatively easy and furthermore; other concrete properties such as resistance to weathering and fire, elastic modulus, and impermeability are directly linked to strength. This means that having the strength data, then the other properties can be deduced. A good concrete mix should take into account the following key attributes: workability, consistency, strength, water cement ratio, durability, density, slump expected, and heat and chemical resistance. The relative proportions of concrete components, either by volume or weight, will closely influence its properties in both fresh and hardened state. The cement-water paste forms the active component in the concrete material, which is dependent on the characteristics of materials used and their relative proportions. The aggregates used must be well graded to minimize air voids in the concrete matrix. Generally, concrete mix designs are currently being over-designed for the fear of production of results that will not meet the minimum strength criteria specified by the engineer concerned. There is therefore need for analysis of concrete compressive strength variance and understanding of the criteria for proper concrete mix designs suitable for various applications. Concrete is a

Technology Essay Example | Topics and Well Written Essays - 250 words - 3

Technology - Essay Example gely contingent on age, by and large, every person grounds his personal preference, principles, and decisions on what he or she ascertained from the information obtainable in television. Just as our culture is molded by the effects of television, so as the nature of our way of thinking, is brought about by our constant observation of the so-called â€Å"great cyclopean boob tube†. Television shapes the public opinion as asserted by the agenda-setting theory of mass communication. The gen that we glean out from watching the television affects our perceptions about different issues in the community as it replaces some of our former understandings of the varied disputes and arguments encompassing our environment. Personally, I use television as my prime source of information and current events. Because of its extensive coverage and the quality of the material that you receive from them, it permanently becomes the foundation from which I direct my elucidations of any political and social arguments. On account of the numerous source of news and coverage of current events, the knowledge that I have gained from watching television sets the platform on which I link and rate the accuracy of the information that I encounter from other sources like newspaper, radio and the internet. Momentarily, the quality of radio and TV programming is satisfactory on the whole. By consolidating the different opinions, arguments, information and standpoints gleaned through watching and listening to the radio and television respectively, a more concise data is achieved. That said, there is no need to change anything not unless if there are debarring hurdles that preclude the development of media, in the forms of ra dio and television, from delivering credible and substantial news to the

Annual Report on Vodafone Statistics Project Example | Topics and Well Written Essays - 3000 words

Annual Report on Vodafone - Statistics Project Example The dynamics within the global telecommunication and IT market have had a great influence on the company’s progress hence the variation in its sales, profits and income and an analysis of these results will help identify some of these effects and also their extent. The data we are analyzing was collected from the annual financial reports of Vodafone published between 1998 and 2013. The information on sales, cost and profits was collected and used for statistical analysis. In this study, the time period is the variable in all cases and the sales, profit and cost data acts as the observation. The data is collected from the internet which is a secondary source of information. It is quantitative data and can be described as being continuous in nature since its values can be counted. The data about all the three variables is collected on quarterly basis ranging from the second quarter on 31st march 1998 to the last quarter in 31st September 2013. Analysis of this data will involve application of the different measures of central tendency including mean, median and mode; the measures of spread and the measures of dispersion which will show how the data is distributed. A forecasting of the future trends will be applied on the results obtains and will be used to predict the future trends. The graph above shows that sales increase with time but the increase is not linear. The trend line is not a smooth curve hence showing that there is no strong relationship between the variables. The quarterly sales increase from left to right and from the graph; we can gather that the sales depreciate at some instance with the peak being reached within the most recent quarters. The graph above shows that the behavior across the time;ine is not uniformly trending hence the curve is not a smooth linear curve. The costs show a great range of fluctuation thereby resulting in a jagged