iosr-JMCE   Volume-11 ~ Issue-6 ~ Nov-Dec 2014

Abstract: In Fossil power boiler, super heater coil type panel is employed to convert saturated steam to super heated steam. Generally these panels are made by formation of thick wall low alloy steel like STEEL ALLOY-213 TUBE-22 material. The power generating capacity of Fossil power boiler is 500 MW.This STEEL ALLOY-213 TUBE-22 material has low creep strength and it cannot withstand continuous high temperature to rectify the above problem, the usage of an alternate material called STEEL ALLOY-213 TUBE-23 was attempted.The welding operation has been carried out in super heater coil by Tungsten Inert Gas (TIG) welding and Sub-merged Arc Welding (SAW). The welding analysis in STEEL ALLOY-213 TUBE-22 and STEEL ALLOY-213 TUBE-23 materials was carried out by four types of mechanical tests namely Impact Test, Tensile Test, Bend Test and Hardness Test.From the obtained results of the mechanical tests, it can be concluded that STEEL ALLOY-213 TUBE-23 material is having better creep strength while compared with STEEL ALLOY-213 TUBE-22 material.

Keywords: Bend Test, Hardness Test, Impact Test, Sub merged arc welding, Tungsten Inert Gas Welding.

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Abstract: Flows induced by rotating objects appear in turbo-machinery, storage devices of computers and ocean circulations, and the investigation of these flows is very interesting. An accurate and reliable analysis of the turbo machine rotating parts is of major concern to ensure fail proof and long life turbine engines. In the case of low aspect ratio of blades makes it necessary to treat them as plates. One of the typical cases of these phenomena is the flow which develops between a rotating disc and a stationary disc (shroud), and the flow has been investigated numerically and experimentally. In this work the basic flow field is investigated over a rotating disk with the shroud at the top. There is a small inlet for air in the shroud and the inlet air gains radial, circumferential and axial velocity due to the rotating disc. An analysis is made to obtain exact solutions for the flow of air due to a disk rotating with a constant angular speed. The studies have been pursued on 4 different revolutions per minute (rpm) and 3 different heights. The various rpm at which experiments were done are 500rpm, 600rpm, 700rpm and 800rpm and the various heights are 5cm, 10cm and 15cm.
Keywords: rotating disc, stationary disc, rpm and radial, circumferential and axial velocity.

[1]. Fundamentals Of Aerodynamics by John D Anderson
[2]. N. Aubry, M.-P. Chauve, R. Guyonnet, Transition to Turbulence on a Rotating Flat Disk, Phys.Fluids, 6, 2800-2814,1994.
[3]. Fluid Mechanics and Hydraulic Machines by R. K.Bansal
[4]. Experimental study of the rotating-disk boundary-layer own by Shintaro Imayama
[5]. Boundary-Layer Theory - Herrmann Schlichting

Abstract: Road sectors are the engines of growth for economy, employment and empowerment. Towns and cities have acted as focal points in the cultural landscape of India for nearlymillennia, though with some significant breaks in between. They continue to play a major role in India's emergence as a premier industrial and political power in the world. Owing to increases in household income, the demands for personalized vehicles have also increased. The booming trade in the commercial vehicle sector has changed the truck industry in India, and definitely for the betterment to meet the demands of industrial activities putting more pressure on VG 30 flexible roads, the effect is noted more significantly with variations in daily and seasonal temperatures contributing to high stresses affecting the flexible pavement. India is brimming with several bad roads be it the metro cities, the cities or the villages. Hence it is our major responsibility that the highway engineers and those associated to it can construct long-lasting roads. So that India can be at par with the developed countries of the world. In order to cope up with the increasing trend of highly laden vehicles, new innovative materials needs to be utilized for highway construction. The present paper thus enlightens theprocedure to find out optimum bitumen content by Marshall Mix design method for BC mix which attains maximum stability by using innovative nanotechchemical material. To 5.4 % optimum bitumen content for BC mix obtained in the laboratory investigations, required dosages of Zycosoil chemical in 0.02%, 0.03% and 0.04% is added and changes in properties are recorded showing improved good results for the mix to be suggested for flexible pavement construction.

Keywords: Bituminous Concrete,Marshall Mix Design,Optimum Bitumen Content, Stability value, Zycosoil.

[1] Bala Raju Teppala and C.B. Mishra(2014) Performance Evaluation of VG 30 Paving mix with and without Zycosoil Chemical Additive
[2] Anil Kumar S and Vijaya Kumar H (2014) Fatigue Behavior of Chemically Treated Bituminous Concrete Mix International Journal of Research (IJR) Vol-1, Issue-6, July 2014
[3] Remadevi M., Anjali G. Pillai, , Elizabeth Baby George, Priya Narayanan, Sophiya Sunny - Study of Fibre Reinforced Bituminous Concrete,International Journal of Engineering Research and Development. Volume 10, Issue 4 (April 2014), PP.49-56
[4] Sangita, TabrezAlam Khan, Sabina & D.K. Sharma - Effect of waste polymer modifier on the properties of bituminous
[5] IS: 1202- 1978, Methods for testing tar and bituminous materials: determination of specific gravity.

Abstract: Fly ash is a fine grey powder consisting of spherical particles that are produced as a by-product in coal fired power station. It has been generally used for land filling . In recent times, the importance and use of fly ash has grown so much that it has almost become a common ingredient of concrete particularly making in high strength and high performance concrete. The use of fly ash as concrete admixtures not only extends technical advantage but also contributes to the environmental pollution control . Extensive research is being carried out in most part of the world that could be occurred in the utilization of Fly ash, which is basically a waste product. The present study mainly concentrate on the various kind of application of fly ash, specially in the civil engineering field and also on it's significant properties.

Key words: NAA, POZZOLANIC, CEMENTITIOUS,

[1] Faber, J. H. 40 Years of Ash Marketing in the U.S.A. In Proceedings of the Utilization of Ash Workshop, May 13–15, 1987. University of North Dakota, Grand Forks, ND; pp I-1–I-7.

[2] hanumatidas N. and Kalidas N.; Portland pozolana cement : An extravagant ignorance.International conference of fly ash Disposal and utilisation Central Borad of Irrigation and Power.

[3] Raghavendra N.; Portland pozzolana cement; Quality, performance and Durability.

[4] Ranga Rao V., Ddoctoral thesis submitted to Andhra University, 1998
[5] file:///F:/fly%20ash/Civil%20Engineering%20%20FLY%20ASH.htm.