iosr-JMCE   Volume-13 ~ Issue-6 ~ Nov-Dec 2016

Abstract: Magnetic levitation is a highly advanced technology. It has various uses such as maglev cars. The common point in all maglev applications is the lack of contact and thus no wear and friction. This increases efficiency, reduce maintenance costs, and increase the useful life of the system. The magnetic levitation technology can be used as an efficient technology in the transportation engineering. Hence Auto China in Beijing presents results PCP – peoples car project with the concept Hover car, an environmentally friendly two-seater city car which hovers above the ground, the study of Zero emissions vehicle that could in future travel along electromagnetic road networks..........

Keywords: Magnetic levitation, PCP, hover craft, electromagnetic road networks, transportation

[1]. www.zaoche.cn

[2]. Munro, John (1897). A Trip to Venus (2007 IndyPublish ed.). London: Jarrold & Sons. pp. 26–28., Archive.org: E-book: A Trip to Venus

[3]. Jump up to:a b Inventor of the week- Elihu Thomson . (2002, February). Retrieved from http://web.mit.edu/invent/iow/thomson. html

[4]. Jump up to:a b Harding, R, & Darroch, D. (2003, May). Emile bachelet collection. Retrieved fromhttp://americanhistory.si.edu/ archives/d8302.htm

[5]. Jump up to:a b c d James R. Powell ph.d. (2002). Retrieved fromhttp://www.fi.edu/winners/2000/powell_james.faw? winner_id=3708

Abstract: The main objective of the present investigation is to assess the usefulness of ceramic tile waste as admixture for fine sand, and focused to improve the engineering properties of fine sand to make it capable to reduced cross section of embankment for road construction. This research paper includes laboratory experimental work, software work and cost analysis work. Different laboratory experiments were performed on fine sand with direct mixing of fine sand of different dry densities 1.50 gm/cc, 1.55 gm/cc and 1.58 gm/cc (M.D.D.) and different percentage 0%, 2%, 4%, 8% and 12% by dry weight of fine sand of ceramic tile waste material having particles size range between 2.36 mm to 4.75 mm. A geotechnical software was used for stability analysis of road embankments of various heights of 6.0 m, 7.5 m and 9.0 m. The rate analysis was done manually according to B.S.R. 2016, P.W.D., Rajasthan, India and cost reduction ratios were calculated. The reduction in cross-section of road embankment was tremendous and the cost of the construction was also reduced to a good extent.

Keywords: Direct shear test, road embankment, factor of safety, ceramic tile waste material, slope stability analysis

[1]. Aditya Kuamr Anupam, Praveen Kumar, G D Ransinchung R N, "Use of Various Agricultural and Industrial Waste Materials in Road Construction", Procedia-Social and Behavioral Sciences 104, pp. 264-273, 2013.
[2]. AK Mishra, R Mathur and P Goel, "Marble Slurry Dust in Roads - An Apt Solution for Industrial Waste", Highway Res Bull, 65 (12), pp. 83-92, 2001.
[3]. Akash Gupta, Dr. N.K. Ameta, "Stabilization of Fine Sand through Ceramic tile Waste as Admixture for Construction of Embankments for Roads", IJIRSET, Vol. 5, Issue 8, August 2016.
[4]. Akash Gupta, Dr. N.K. Ameta, "Fine Sand Stabilization Using Ceramic tile Waste as Admixture for Design of Flexible Pavement in Construction of Roads", American Journal of Engineering Research, Volume -5, Issue 8, pp. 186-191, 2016.
[5]. Bishop, A.W., "The Use of the Slip Circle in the Stability Analysis of Slopes", Geotechnique, Vol. 5, pp. 7–17, 1955.

Abstract: Aluminum MMCs are preferred to other conventional materials in the fields of aerospace, automotive and marine applications owing to their improved properties like high strength to weight ratio, good wear resistance etc. In the present work an attempt has been made to synthesize metal matrix composite using 7075Al as matrix material reinforced with ceramic Al4C3 particulates using liquid metallurgy route in particular stir casting technique. The addition level of reinforcement is being varied from 2 - 10wt% in steps of 2wt%. For each composite, reinforcement particles were preheated to a temperature of 2000C and then dispersed in steps of two into the vortex of molten Al7075 alloy to improve wettability and distribution...........

Keywords: MMC's, Al4C3 particulates, 7075Al, stir-casting

[1]. P. Rohatgi, "Cast aluminum matrix composites for automotive applications" J. Organomet. Chem. (1991) 10–15.
[2]. G.A. Chadwich, P.J. Heath, Machining of metal matrix composites, met. Mater. 2–6 (1990) 73–76.
[3]. J. Gilbert Kaufman "Properties of Aluminum Alloys; Tensile, Creep, and Fatigue Data at High and Low Temperatures", ASM International 2002.
[4]. G. B. Veeresh Kumar, C. S. P. Rao, N. Selvaraj, M. S. Bhagyashekar "Studies on Al6061-SiC and Al7075-Al2O3 Metal Matrix Composites" Journal of Minerals & Materials Characterization & Engineering, Vol. 9, No.1, pp.43-55, 2010
[5]. Y. Reda, R. Abdel-Karim and I. Elmahallawi "Improvements in mechanical and stress corrosion cracking properties in Al-alloy 7075 via retrogression and reaging" Materials Science and Engineering: A, Volume 485, Issues 1-2, 25June 2008, andPages468-475.

Abstract: The current state of knowledge of cement hydration mechanisms is reviewed, including the origin of the period of slow reaction in alite and cement, the nature of the acceleration period, the role of calcium sulfate in modifying the reaction rate of tricalcium, aluminate, the interactions of silicates and aluminates, and the kinetics of the deceleration period. In addition, several remaining controversies or gaps in understanding are identified, such as the nature and influence on kinetics of an early surface hydrate, the mechanistic origin of the beginning of the acceleration period, the manner in which microscopic growth processes lead to the characteristic morphologies of hydration products at larger length scales, and the role played by diffusion in the deceleration period. The review concludes with some perspectives on research needs for the future.........

Keywords:  Hydration (A)
 Kinetics (A)
 Microstructure (B)

[1]. H.F.W. Taylor, P. Barret, P.W. Brown, D.D. Double, G. Frohnsdorff, V. Johansen, D. Ménétrier-Sorrentino, I. Odler, L.J. Parrott, J.M. Pommersheim, M. Regourd, J.F. YoungThe hydration of tricalcium silicateMater. Struct., 17 (1984), pp. 457–468|
[2]. E.M. Gartner, J.M. GaidisHydration mechanisms, IJ. Skalny (Ed.), Materials Science of Concrete, Vol. 1American Ceramic Society, Westerville, OH (1989) pp. 95–125
[3]. J.M. Gaidis, E.M. GartnerHydration mechanisms, IIJ. Skalny, S. Mindess (Eds.), Materials Science of Concrete, Vol. 2American Ceramic Society, Westerville, OH (1989), pp. 9–39
[4]. E.M. Gartner, J.F. Young, D.A. Damidot, I. JawedHydration of portland cementJ. Bensted, P. Barnes (Eds.), Structure and Performance of Cements (2nd Edition), Spon Press, New York (2002), pp. 57 -113
[5]. S. Glasstone, K.J. Laidler, H. EyringThe Theory of Rate ProcessesMcGraw-Hill, New York (1941)