Before Hoover Dam After By- Balaji.T.K‚ CE02B011 CONTENTS No Description Page no 1. Hoover dam an Introduction 1 2. Requirements posed by structural design 2 3. Requirements posed by other details 6 4. Type of Concrete 7 5. Guidelines for Mix design 9 6. Fabrication and Installation 10 7. Formwork 11 8. Cooling of concrete 12 9. Temperature control of Mass Concrete 12 10. Quality Assurance 13 11. Bibliography 14 Hoover Dam- an Introduction! It still stands tall as an engineering marvel
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DECAY AND DRTERIORATION OF BUILDINGS CAUSES OF OCCURANCE OF CRACKS The important causes responsible for occurrence of cracks in buildings‚ are as under: 1) Cracks due to moisture changes. 2) Cracks due to temperature variation. 3) Cracks due to elastic deformation and creep. 4) Cracks due to effect of chemical reaction. 5) Cracks due to movements of ground. 6) Cracks due to vegetation. The various causes of formation of cracks and measures adopted to prevent them are described
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| | | Description of Materials | Unit | Unit Cost | 1. FOUNDATION‚ CONCRETE COLUMNS‚ BEAMS AND CONCRETE HOLLOW BLOCKS WALLS | | | Portland Cement | BAG | 212.00 | Sand (S-1) | CU.M. | 3200.00 | Gravel or Crushed Stones (G-1) | CU.M. | 600.00 | Earth Fill | CU.M. | 2700.00 | C.H.B. 4" THK | PIECE | 7.50 | Steel Reinforcing Bars‚ Deformed | | | 10mmX6.00 meters | PIECE | 121.00 | 12mmX6.00 meters | PIECE | 173.00 |
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of sand and rock or similar inert material (aggregates) held together by a cementing material. Usually the cementing material is Portland cement‚ but sometimes binders such as asphalt or gypsum are used‚ in which case the concrete may be called asphaltic concrete or gypsum concrete. Properties of concrete are governed not only by the properties of its ingredients (cement‚ water‚ sand‚ and coarse aggregate) but also‚ to a great extent‚ by the relative proportions of these ingredients. The proportions
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Throughout history pavement has been changed to help society better use roads. Originally‚ the Romans had used a military road system to help defeat their enemies. These military road systems weren’t efficient to build‚ they required lots of physical labor and cost roughly $2‚000‚000 per km. In the 1800’s‚ Telford came up with the idea to create relatively flat roads in three layers to reduce the amount of horses needed to haul objects. The top two layers consisted of stones and the lowest layer
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Introduction: CEMEX which is one of the largest cement producers in the world was founded in 1906 by Lorenzo Zambrano Gutierrez near Monterrey in Northern Mexico. It was initially named as Cementos Hidalgo. CEMEX remained a domestic company till 1960. During this period it acquired company called Cementos Portland Monterrey and merged with Cementos Mexicanos. In 1982 when the economic crisis hit Mexico‚ the government was forced to liberalize its economy which allowed CEMEX to attract foreign investment
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desired degree. MATERIALS USED IN PRESTRESSED CONCRETE (1) CEMENT – The cement used shall be any of the following‚ with the prior Approval of the engineer-in-charge: Ordinary Portland cement conforming to IS : 269-1976”; Portland slag cement conforming to IS : 4551976t‚ but with not more than 50 percent slag content; Rapid-hardening Portland cement conforming to IS : 8041-1978; High strength ordinary Portland cement conforming to IS : 8112- 19765. ( 2) AGGREGATES-
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strength test…………………….5 * Results and graphs………………………5 6. Discussions and recommendations…………...6 7. References……………………………………..6 INTRODUCTION Concrete is one of the most commonly used structural materials. It is made by simply mixing cement‚ aggregate‚ sand and water in the “right” proportion. The strength of concrete varies even with the slightest variation in the ratio or quality of its ingredients. Concrete properties are highly influenced by the water type used and its proportion
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Applied Engineering science report. Michael Connor B00240227 Part A: Several mixtures of cement‚ aggregate‚ sand and water were mixed at different ratios to workability and compressive strength. The dry materials of the mixture were mixed and water was gradually added‚ the mixture was then placed in a cube and allowed to dry forming the concrete testing cube. Each of the four blocks containing different compositions of each material were then placed in a compressive testing machine and when
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load and for architectonic applications PERVIOUS CONCRETE Pervious pavement is a cement-based concrete product that has a porous structure which allows rainwater to pass directly through the pavement and into the soil naturally. This porosity is achieved without compromising the strength‚ durability‚ or integrity of the concrete structure itself. The pavement is comprised of a special blend of Portland Cement‚ coarse aggregate rock‚ and water. Once dried‚ the pavement has a porous texture that
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