PRECAST CONCRETE STRUCTURES VISVODAYA ENGINEERING COLLEGE DEPARTMENT OF CIVIL ENGINEERING KAVALI-524201 PAPER PRESENTATION BY Author 1: Author 2: D.chanikya ‚ Ch.Lokesh
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PRESTRESSED CONCRETE The development of early cracks in reinforced concrete due to incompatibility in the strains of steel & concrete was perhaps the starting point in the development of new material like “Prestressed Concrete”. Prestressed Concrete is a method for overcoming concrete’s natural weakness in tension. INTRODUCTION Prestressed Concrete is basically concrete in which internal stresses of suitable magnitude & distribution are
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www.jntuworld.com www.android.jntuworld.com www.jwjobs.net Code No: R31013 R10 Set No: 1 III B.Tech. I Semester Regular Examinations‚ November/December - 2012 CONCRETE TECHNOLOGY (Civil Engineering) Time: 3 Hours Max Marks: 75 Answer any FIVE Questions All Questions carry equal marks ***** Assume missing data suitably 1. (a) Describe the oxide composition of Ordinary Portland Cement. (b) What are the main compounds into which the above oxides will transform in the process of fusion
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Musique Concrete Music has existed since the beginning of time‚ evolving and changing with the times and culture. From monks chanting to the Beatles in the 1960’s‚ there is a long line of the evolution of music. The existence of musique concrete was another step in the world’s music history. But before going any further perhaps the definition of musique concrete should be specified. “ Musique concrete is the name given to a class of electronic music produced from editing together fragments of
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Consolidation of plastic concrete is termed as compaction. In the process of compaction‚ efforts are only directed to reduce the voids in the compacted concrete. Compaction of concrete can be done either manually or mechanically. When it is done manually it is called hand compaction or tamping‚ and in second case it is termed as machine compaction. Hand compaction: Hand compaction is done with the help of steel tamping rods‚ or timber screeds. Marrow and deep members are compacted with tamping
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Concrete and Steel Testing BIP Geotechnical and Material Testing Engineers and Water Supply Bakakeng‚ Baguio City In the construction‚ it is better to know the strength of concrete and steel to be used especially in a high rise building. Our Laboratory No. 1 for this Midterm is to determine the slump of freshly concrete mixed with Portland cement concrete‚ the strength and the mixtures of the concrete. July 27‚ 2012‚ we performed our laboratory. We the second group‚ use crushed aggregates
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been approved for use by agencies of the Department of Defense. e1 NOTE—Range value in 12.2.2 was editorially corrected July 2001. 1. Scope 1.1 This specification covers materials for use as chemical admixtures to be added to hydraulic-cement concrete mixtures in the field for the purpose or purposes indicated for the seven types as follows: 1.1.1 Type A—Water-reducing admixtures‚ 1.1.2 Type B—Retarding admixtures‚ 1.1.3 Type C—Accelerating admixtures‚ 1.1.4 Type D—Water-reducing and retarding
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Mixture proportioning: Procedures outlined in ACI 211.1 should be used for mixture proportioning. Typical proportions for heavyweight concrete are shown in Table 2. MATERIALS : Cement Cements conforming to ASTM C 150‚ which would be suitable for conventional concrete and produce the required physical properties‚ are suitable for use in heavyweight concrete. Aggregate Thorough examination and evaluation of heavyweight aggregate sources are necessary to obtain material suitable for the type
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The greatness of Roman architecture is built‚ quite literally‚ upon the foundation of two important items: the discovery of concrete and the adoption of the arch from the Greeks. Concrete was an exceptional development within the Roman world and catapulted Roman construction into new heights of efficiency and stability. According to Kamm (1995)‚ the origin of Roman concrete can be found in a volcanic earth known as pozzolana‚ initially found near the Greek settlement of Puteoli. It would later be
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POLYMER COCNCRETE 1. Introduction Despite being thought of as a modern material‚ concrete has been in use for hundreds of years. The word concrete comes from the Latin concretus‚ which means “mixed together” or compounded. Concrete is an extremely popular structural material due to its low cost and easy fabrication. Concrete is made up of sand or stone‚ known as aggregate‚ combined with cement paste to bind it. Aggregate can be of various sizes. It is broadly categorized as fine (commonly
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