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Experimental study on durability assessment of concrete structures due to various chemical attacks

The strength and durability of concrete after casting changes at variance factors regarding physical and chemical damages. Concrete structures with steel-reinforcement are in a continuous and losing life with corrosiveness that naturally occurs from long-term exposure to an aggressive environment. The concrete structure like dams, canals, bridges which have the influence of water forms various types of chemical reactions which include carbonation attack, sulfate attack, chloride attack, alkali-aggregate reaction, etc. Chemical reactions, either intrinsic or extrinsic, are one of the main reason for concrete’s deterioration. The present dissertation consists of an analysis of the chemical expansive reactions in concrete element, the alkalis aggregate reaction, and the internal sulfuric reaction. During the carbonation process, the fundamental element identified in the concrete microstructure is calcite which comes outs at the surface of concrete structure, in the form of cracks. When carbon dioxide causes by environment come contact into the concrete structure and effect with calcium hydroxide to create calcium carbonate this phenomenon is called as carbonation. Carbonation usually describes by ph value which indicates the depth of reaction in the structure. The depth of carbonation directly affects the life of the structure in the year. Through the years to overcome this problem the solution is being discovered by performing various experiments on Concrete after and before the casting. Which gave us the Chemical test like by increasing the CO2 binding capacity, improving CaO Value and physical tests such as applying an epoxy coating, etc. After all, performing the various types of test for a particular outcome finally check for durability tests for the concrete structure is taking place for better result. There are many of them but in this case, it will be ph indicator, UTM and CTM are being discussed. This project address the study of chemical reaction which is take place on various type of concrete structures and affect the durability and strength of it.

Published by: Venkatesh B. Panmand, Dr. Sanjay Kulkarni

Author: Venkatesh B. Panmand

Paper ID: V5I3-1913

Paper Status: published

Published: June 17, 2019

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Research Paper

Performance analysis of flat plate hybrid PV/T solar water collector system

Solar Photovoltaic module converts the light component of solar radiation into electrical output measured in watts and heat part is absorbed by module increasing its operating temperature which reduces the electrical efficiency of the module by 10 to 35%. Hence by using the external cooling system, the module temperature can be reduced to improve electrical power efficiency. This cooling system is called a photovoltaic heat exchanger. The cooling system fitted to the backside of the PV module produces thermal power(in terms of hot water), can be used for low-temperature applications. Combined PV module and heat exchanger generating both electrical and thermal power are called as hybrid Photovoltaic/Thermal (PV/T) solar system. Performance of a direct flow heat exchanger and its effect on the hybrid PV/T system is studied in the current paper. The experimental analysis and results like performance efficiencies of Photovoltaic, thermal and PV/T system at different loading conditions were discussed and evaluated for the latitude of Kalyan, Mumbai. The results at solar radiation of 6.52 kWh/m2/day and water mass flow rate of 0.04 kg/sec through heat exchanger showed improvement in combined PV/T efficiency of 73.7% with PV efficiency of 12.7% and performance ratio of 70.5%.

Published by: Snehal Prabhakar Sonawane, H. B. Chaudhari

Author: Snehal Prabhakar Sonawane

Paper ID: V5I3-1902

Paper Status: published

Published: June 17, 2019

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Research Paper

Green concrete with high-volume fly ash and slag with recycled aggregate and recycled water to build future sustainable cities

Building sustainable green cities for the future can be difficult or highly challenging as such cities need to reduce their environmental footprint through eco-friendly materials, resource and energy conservation, as well as renewable energy generation. This paper proposes three new types of sustainable concretes in an attempt to further reduce the carbon footprint. In Type I, a total of 4 concrete mixes were made with a high volume GGBFS with 60, 70, 80, and 90% replacement of ordinary portland cement (OPC),100% recycled water (RW), and 100% recycled aggregate (RA). The same replacement ratios were used in Type II but with only 100% RA. In Type III, a total of four concrete mixes made with a high volume fly ash (FA) cement with 40, 50, 60, and 70% replacement of OPC. The paper provides information on the mix design, full justification of CO2 footprint, and the cost for each concrete mix. The hardened and plastic properties and durability test parameters for each mix are presented. The results showed that the fly ash and slag significantly reduced the carbon footprint and meet the requirements of future sustainable cities. An economical mix with 90% GGBFS and 10% OPC was nominated for use in the future construction of sustainable cities with 125 kg=m3 emissions.

Published by: M. Mothilal, K. Mounika

Author: M. Mothilal

Paper ID: V5I3-1881

Paper Status: published

Published: June 17, 2019

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Research Paper

In vitro micropropagation of Cheilanthes farinosa (Forssk.) Kaulf. Pteridaceae

Cheilanthes farinosa is a pteridophytic plant belongs to the family Pteridaceae is a rare plant of rhizome up to 1 cm. in diam. Sori minute, 1 mm. in diam, closely set along the margins of the pinna segments. The plant roots are used to treat eczema and stomachache; fronds are used to treat menstrual disorders. Rhizomes and roots are used to treat gout, rheumatism and used as general tonics. It is used in the treatment of inflammatory, skin disorders and rheumatism etc., So the Cheilanthes farinosa plant was chosen for conservation through micropropagation. The sporangia are used as explant. MS medium with 3.5mgL-1 of BAP and GA3 shows the high growth rate and 2.4mgL-1 of IBA and KIN shows the slow growth rate. After 1 month of inoculation, the gametophytic body was developed. And it was subculture to MS medium containing various concentrations of BAP and GA3.

Published by: Kavitha R., Prabakaran R.

Author: Kavitha R.

Paper ID: V5I3-1869

Paper Status: published

Published: June 17, 2019

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Research Paper

Analysis and optimization of Ti (Grade-5) on µ-EDM by using Taguchi Methods

During the last decennium, there has been perpetuating authoritative ordinance of compact, integrated and diminutive size product by a nontraditional process for precise and cost efficacious quantification of material properties. These are needed for machining for implements and product design, the development of micro-size components, the growing desiderata for microfeature generation. Micromanufacturing process has different materials capability and machining performance designation. Machining performance designation of concern includes minimum feature size, tolerance, surface finish and MRR and application of advanced, which is very arduous to machine materials. They have made the micro EDM a paramount manufacturing process to meet these authoritative ordinances. Micro EDM technology has been widely utilized in engenderment, aerospace, aircraft, medical and virtually all areas of conductive material machining. Ti (Grade 5) is ever engendered in manufacturing industries. It is capable to withstand in very high temperature and the excellent resistance in mechanical and chemical debilitate. The Ti (Grade 5) aluminum predicated superalloys are having high vigor thermal conflict with very hard material characteristics it is withal very good corrosion resistance in many conditions of engineering application. Due to very tough in nature and the machinability has been studied by many researchers on these materials and been carried out for the last few years. This objective of this project is to investigate the performance of Micro EDM machining on Ti materials.

Published by: Aditi Tiwari, Manoj Patel

Author: Aditi Tiwari

Paper ID: V5I3-1895

Paper Status: published

Published: June 15, 2019

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Research Paper

Solar powered seed sowing machine and spray pump

The seed sowing machine is the main equipment of the agriculture field. It is used for seed sowing and plantation. Population increasing rapidly day by day, therefore, it is necessary to meet the food demands hence it has to be developed seed sowing machine. Traditional method consumes more power as well as time with less efficiency. Labor availability becomes a major problem for farmers. This machine requires less man power as well as overall cost. So it is important to develop more efficient methods. Application of Non-conventional energy is the only another option to fulfill demands. In this paper, the development of solar-powered seed sowing machine is mentioned.

Published by: Pramod B. Magade, Abhijeet G Kulkarni, Akshay Bhoi, Nilesh Waykar, Dnyaneshwar Karad

Author: Pramod B. Magade

Paper ID: V5I3-1885

Paper Status: published

Published: June 15, 2019

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