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Matura, Seminar Graduate work in economics: management, marketing, finance, e-business, Internet technology, business plans, macroeconomics, microeconomics, entrepreneurship, human resource management, peroxide customs and taxes. Building Adhesives - Cement is a hydraulic mineral binder which is obtained by grinding so. Portland cement clinker - artificial stone material that is produced by baking limestone and clay, baking temperature is 1350-1450 C. English engineer Joseph Aspdin peroxide patented a Portland cement in 1824, and named after the limestone wall Islands Portland in England because of the similarity in color. In addition peroxide to Portland cement clinker, in which the benefits of obtaining a mixture of limestone and clay in a ratio of 3: 1 (weight ratio), in the cement to be present and a smaller amount of gypsum (to 5%) which is added to regulate the setting time of cement. Portland cement is characterized peroxide by proportionally constant chemical composition as follows: peroxide CaO (tied) peroxide 62-67%, 19-25% SiO2, Al2O3, 2-8%, 1-5% Fe2O3, SO3 most 3-4.5%, CaO (unattached) maximum 2 %, at most 5% of MgO, alkalis (Na2O and K2O) 0.5-1.3%. Cement is generally can be divided into types and classes. The types of cements represent categories with regard to the composition and production technology, while class cements peroxide indicate their mechanical properties. They are divided into two basic groups: the semente of Portland cement clinker and other - special types of cement. Cements based on portland cement clinker These are all cements produced by grinding Portland cement peroxide clinker. They include cements besides Portland cement clinker peroxide contain other various admixtures that modify the properties of Portland cement depending on the content. By increasing these amendments will clearly be more manifest differences between these cements and pure Portland cement. Although the strength of these cements were initially less than the strength of pure Portland cement are generally at higher ages of 28 days, surpass and strength. Therefore, peroxide they have the same classes as the pure Portland cement. Also, depending on the content of these amendments, changes are requirements for the amount of water, especially if you are as a supplement pojavnjuju pozzolans. Portland cement This cement has no other ingredients except for those who are part of portland cement clinker, gypsum except additives, which is necessary to regulate the setting time. This is undoubtedly the most important types of cement, since it represents the basis for the preparation of most other types of cement. On a global scale of the total production of cement in Portland cement accounts for about 70%. But with us this cement accounts for 5% SVEKLI. With us is the largest manufacture of cement with slag additions and / or pozzolan. Specifically with the mass of portland cement is at least 3000 kg / m , while its specific surface area of at least 2400 cm / g. ... ORDER WORK ON THIS LINK >>> SEMINAR graduation thesis seminar papers graduation seminar graduation work graduate peroxide seminar thesis reading prom action senior thesis script graduation thesis Graduation thesis preparation works conscientious students master reading papers seniors tutorials download reading room master master master work master thesis works seminar seminar seminar peroxide seminar papers peroxide quality grade college faculties Schools schooling title university master thesis liking, CALL five friends and earn
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