Volume 6 | Issue 1 |

 Abstract

The objective of this research work was to produce a carbon dioxide emission free cementitious material. The geopolymer concrete is such a vital and promising one. In this present study the cement is replaced by GGBS(Ground Granulated Blast Furnace Slag) and Fly Ash .The Alkaline liquids used in this study for the polymerization process are the solutions of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). A 10 Molarity solution was taken to prepare the mix. The cube compressive strength was calculated for 10 M solution for different mix Id i.e. G10F90, G20F80, G30F70, and G40F60 (Where F and G are, respectively, Fly Ash and GGBS and the numerical value indicates the percentage of replacement of cement by fly ash and GGBS). The cube specimens are taken of size 150 mm x 150 mm x 150 mm. Ambient curing of concrete at a temperature of 35-400c was adopted. In total 6 cubes and 3 beams were cast for different mix Id and the cube and beam specimens are tested for their compressive strength at age of 7 days, 14 day and 28 days respectively. The result shows that geopolymer concrete gains strength with increase in the GGBS content without water curing at ambient temperature. Also the strength of Geopolymer concrete was increased with increase in period of curing.

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Geopolymer concrete

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By using GBFS which is a by-product of steel industry as a fine aggregate, we can save the natural resources and environment. The GBFS provides durability and better engineering properties and the elliptical shape which helps in enhanced thermal properties. The experiment helps in find out the economical and technical features of the product by conducting different tests like economical mix proportions, compressive strength, to meet the standards and to develop eco-friendly building block. Since, it is designated as Green Building Material it would help to get GRIHA (Green Rating for Integrated Habitat Assessment) as well as the LEED (Leadership in Energy and Environmental Design) certification. Systematic laboratory tests were carried out with different proportions of cement, river sand and slag sand to compare the quality, durability and technical feasibility.

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 Keywords

Concrete Bricks, Ordinary Portland Cement (OPC), Ground Granulated Blast furnace Slag (GGBS), Granulated Blast furnace Slag (GBS).

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The rate of montmorillonite is more in black cotton soil which causes expansiveness and crack occurs in soil without any warning which is dangerous for construction. Such expansive soils are very susceptible to detrimental volume changes with changes in moisture content. Expensive soils because of their speci?c physical & chemical make are subjected to volume changes. In this study nano chemicals terrasil and zycobond used for soil stabilization. In this investigation Cement is used in the constant proportion of 3% of amount of soil and the nano chemicals terrasil and zycobond are used are 0.6kg/m3, 0.8kg/m3, 1kg/m3, 1.2kg/m3 of each. uncon?ned compressive strength test is performed after the curing period of 7days, 21days,28days.Free swell index test is performed for the proportions of 0.6kg/m3,0.8kg/m3,1kg/m3,1.2kg/m3of terrasil and zycobond.

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 Keywords

Terrasil, Zycobond, Soil Stabilization, Strength, Black cotton soil.

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 Abstract

India has an enormous growth in steel industry and Slag is a byproduct of the same which has to be disposed properly. Steel industry generate large quantities of Slags from their iron-making and steel-making processes. Iron making Slags are recycled in cement making and steel-making Slags are dumped because they are unsuitable for the cement industry owing to the high iron content and other impurities. Reuse of waste in integrated steel plants is important with regard to environmental and economic consideration. LD Slag is a byproduct of the iron ore and steel making industry. It is produced in large quantities and poses a substantial disposal problem. The letters LD means Linz and Donawitz, towns in Austria where the process was invented. The generation of LD Slag in Indian steel plants is about 200 kg per ton of hot metal produced. Out of this only 25% is being reutilized in India compared to 70-100% in other countries. The objective of the present study is to study the possibility of using LD Slag as partial replacement of coarse aggregate and to compare the properties of the proposed concrete with that of existing conventional concrete. An experimental investigation was carried out to evaluate the effect of replacing coarse aggregate by LD Slag on flexural strength and compressive strength of concrete. Coarse aggregate was replaced with three percentages (1%, 2% and 3%) of LD Slag by volume in M25 grade of concrete with 0.5 water cement ratio (w/c).

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 Keywords

LD Slag, Partial Replacement

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Developing an accurate finite element model of an ankle joint is a challenging task and time consuming. The objective of this paper is to model, simulate and analyze the effects of loading on the viscoelastic behavior of human articular cartilage at the ankle joint. Dataset of a healthy male volunteer is to taken to reconstruct a detailed three-dimensional model of an ankle joint. The bone models are segmented into two types of bones - cortical and cancellous according to the Hounsfield unit. The ankle model consists of tibia, fibula, talus, calcaneus, cuboid, navicular bones cartilage. The cartilages were constructed using prony series viscoelastic properties. . The ankle joint is modeled in CATIA V5 and Analysis is performed in ANSYS 16.1 Workbench. Two kind of Analysis, Static and Transient Analysis were conducted on the cartilage and its replacement materials like Poly Vinyl Alcohol (PVA) and Polyethylene glycol (PEG) and Von-Mises Stresses and deformations along Z axis are tabulated for different forces. From the simulation results one can conclude that PVA and PEG can replace the cartilage for the said conditions.

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Neural networks, face recognition, fuzzy system, Neuro-fuzzy.

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Several technical challenges exist with casting technology yet it can be used to overcome this problem. Achieving a uniform distribution of reinforcement within the matrix is one such challenge, which affects directly on the properties and quality of composite material .In the present study a modest attempt would be made to develop Aluminium based silicon carbide particulate MMCs with an objective to develop a conventional low cost method of producing MMCs and to obtain homogenous dispersion of ceramic material. To achieve these objectives two step-mixing method of stir casting technique has been proposed and subsequent property analysis has been made. Aluminium (98.41%) and SiC (320-grit) has been chosen as matrix and reinforcement material respectively. Aluminum alloys are widely used in aerospace and automobile industries due to their low density and good mechanical properties, better corrosion resistance and wear, low thermal coefficient of expansion as compared to conventional metals and alloys. The excellent mechanical properties of these materials and relatively low production cost make them a very attractive candidate for a variety of applications both from scientific and technological viewpoints. The aim involved in designing aluminum based metal matrix composite materials is to combine the desirable attributes of metals and Ceramics.

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desirable attributes of metals and Ceramics

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The availability of a system, machine or equipment for production or service is the key parameter to improve the productivity of any organization. The failures cannot be avoided completely but can be reduced through proper maintenance programme which can be developed if one can predict the occurrence and mode of failure in advance. Hence, it is the responsibility of managers to keep track of their machines or equipment and make available for maximum run hours with minimum failures. This will also help them in improving the reliability of the machines/equipment. This study is taken up to identify the failure and run modes of TSRTC buses to improve the availability and the customer satisfaction. The data regarding the bus failures and run hours for the period of 32 months has been collected and trend is analysed using graphical methods and also tested for presence of correlation.

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Trend, Failure mode, Availability, Time between failures (TBF), CTBF, Run Time

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Drying is veryimportant process in the manufacture of POP (Plaster of Paris) Sheets which are usedfor false ceilings in households.Efficient drying of POP sheets gives proper finishing and consumes less time. Generally these POP sheets are dried in open atmospheric condition which takes long time to dry. The main aim of this project is to design, fabricate and test the solar dryer to reduce the drying time of the POP sheets.The project work is carried out based on the requirement of a small scale industry located at Piduguralla, Guntur district, A.P. which manufactures POP sheets. The design of a solar dryer consists of absorber plate made of GI sheet and reflector plate made of Steel sheet which is placed at the backside of the dryer.The test results gave temperature about 45OC by modifying the experimental steps. The experiment conducted to remove the moisture by keeping the sheets inside the dryer. The test results have shown that the moisture removed was more than 50% when they are kept in the dryer compared with the drying in open atmosphere. The test results were compared by modifying the experimental setup by replacing steel sheet with clear polyvinyl sheet, to decrease the cost of solar dryer. The moisture removed from POP sheets with this setup is almost same as that of POP sheets dried in open atmosphere. Hence it is suggested to use a solar dryer with steel reflector at the backside.

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Solar dryer, POP sheets, polyvinyl sheet

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The present work shows, to anticipate the work piece displacement in face turning under dry machining condition. Present work, concentrates on the improvement in machinability during vibration assisted turning of the AISI 4140 steel has been investigated using FFT analyzer. The effect of work piece displacement due to vibration on the tool wear is examined. The axial vibration amplitudes in feed direction obviously increase with increasing the feed rate. Predicted load in Y- direction for all test conditions is observed. The correlation between tool wear and displacement due to vibration analysis is done.

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Displacement, face turning, Tool wear, FFT, and vibration

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Multi walled Carbon nanotubes (MWCNTs) are creating a center of attention in scientific and industrial attention by good feature of their distinctiveness. Present research is on Fabrication and depiction of E-Glass Fiber Composites developed by MWCNTs. The Factors deemed for present problem are Weight of MWCNTs, Methodology to disperse MWCNTs in epoxy, Orientation of the E-glass fiber. Fabrication of E-Glass Fiber Composites was carried out with respect to the ASTM standards D3039-76 and Tensile Testing was performed. The results show that the nano-particulated composite plate can be manufactured by considering less nano-particles stirred with probe sonicator and plied up with hybrid orientation

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 Keywords

Carbon Nanotubes, Composite material, Charecterization of materials.

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