ADVANTAGES AND DISADVANTAGES OF PRESTRESSED CONCRETE ADVANTAGES : Use of high strength concrete and freedom from cracks‚ in prestressed members‚ contribute to improved durability under aggressive environmental conditions. The use of high strength concrete and high tensile steel in prestressed concrete members results in lighter and slender members than could be possible by using reinforced concrete and Mild steel as reinforcement. In prestressed concrete‚ steel is no longer required for reinforcement
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Our product is composed of very healthy essential ingredients which is: Flan Is a sweet custard made with eggs and milk and often served with a caramel sauce.. it also contain certain vitamins and minerals Yams It is a root vegetable. Provide a very good source of potassium and fiber
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Non-destructive Testing Of Concrete By Rebound Hammer By Kaushal Kishore Materials Engineer‚ Roorkee INTRODUCTION The standard method of determining strength of hardened concrete consists of testing concrete cubes in compression. The quality of entire concrete of a structure cannot be fully assessed by testing a few concrete cubes. The results obtained in testing cubes do not always reflect the actual strength of concrete in construction. In a whole day‚ concreting work cubes are cast in
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Title : Concrete Cube Compressive Strength (7 days) Introduction : To determine the strength‚ maximum load can be applied and workability of concrete mixture. Theory : Hard concrete test were conducted at the age of 3‚ 7‚ 14‚ 21 and 28 days after curing(but we tested it for 7 days only). The concrete strength increases according to the age‚the mixture of its concrete design and the strength increment will continue for sometimes. Nevertheless‚ for most of the work‚ the concrete strength on
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Some of them of the great things that they have built include; concrete‚ roads and arches. With these inventions and several more‚ the Romans have changed the art of buildings for ever. Without it the world would not be the same‚ and it would affect our world forever. One of the first inventions that the Romans made‚ was concrete. Concrete was used to be made as a glue like substance for building structures. The Roman concrete was made of lime‚ seawater and volcanic ash. According to the Article
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Objective The purpose of this lab is to determine the particle size distribution of the fine and coarse aggregates by sieving. Equipment and Material Balance‚ sensitive to within 0.1% of the weight of the sample to be tested Standard sieves for grading of fine aggregates- 4.75 mm‚ 2.36 mm‚ 1.18 mm‚ 300m‚ 150m (# 4‚ 8‚ 16‚ 50 and 100) Standard sieves for grading coarse aggregates- 1 ½ in.‚ 1 in.‚ ¾ in.‚ ½ ‚ 3/8 in.‚ 4 in‚ plus a 4.75 mm(#4 sieve) Fine (0.5 Kg) and coarse (2 to 20 Kg depending
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Concrete mixer which is also commonly named as cement mixer is a device that homogeneously combines cement‚ aggregate such as sand or gravel‚ and water to form concrete. History Why did man invent concrete mixer? The reason of it is that in the early 20th century‚ the concrete was developed when some new materials added to cement. After the concrete was developed‚ the art of mixing it had to reform. Therefore‚ concrete mixers were becoming pretty popular by early 20th Century. This coincided
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To start‚ let’s establish what both an arch and concrete are. An arch is a curved structure that spans a space and may or may not support weight above it (Wikipedia). Concrete in the Roman period had a basis of what is called pozzolana‚ a chocolate-colored volcanic earth (Wilson‚ A‚ n.d). The Romans used both extensively and showcased these in their private dwellings‚ public buildings‚ statutes and the construction of town walls throughout the Roman empire. The arch itself was introduced to the
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Ingredients for concrete are cement‚ fine aggregate‚ coarse aggregate and water. The best concrete can be obtained by mixing the ingredients in correct proportions. The ideal proportion of concrete will be that‚ which produces greatest strength and solidity at the least cost. In estimating the quantities of ingredients for cement concrete it should keep in mind that voids of coarse aggregates are filled up by sand and voids of fine aggregates are filled up by cement. The concrete mix of 1: 1: 2 and
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