B. S. Balakumar ¹, K. Ramanathan ², S. Kumaresan ¹, R. Suresh ¹

Affiliations
1 Dept. Of Plant biology & Plant Biotechnol., RKM. Vivekananda College, Mylapore, Chennai 600 004, IN
2 Mayo Clinic, Rochester, Minnesota, US

Abstract

Serious health problems in humans are caused by arsenic-exposure, which is wide spread in the environment. Sodium arsenite, capable of inducing macromolecular damage is evaluated for its DNA damaging effect in the blood, liver, kidney and bone marrow cells of Wistar rats. Also the ameliorative potential of a-tocopherol (400 mg/kg body weight) and ascorbic acid (200 mg/kg body weight) supplemented orally to arsenic-intoxicated rats (100 ppm in drinking water for thirty days) in neutralizing the genotoxic effect of arsenite was explored. Detection of DNA damage at cellular level is evaluated by single cell gel electrophoresis or comet assay, under alkaline conditions. This study demonstrated that dietary supplementation of antioxidants such as vitamins C and E could ameliorate arsenite induced toxicity in experimental rats.

Keywords

Arsenic, Antioxidants, Ascorbic Acid, Comet Assay, DNA Damage, Genotoxicity, in vivo, α- Tocopherol

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R. Suresh ¹, M. G. Nagarjun ¹

Affiliations
1 Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumakuru - 572103, Karnataka, IN

Abstract

From the past years coal is used as major fuel source for melting nonferrous metal in many foundry industries which is hazardous. The coal should be replaced by environmental friendly or reduced pollutant fuels. Biodiesel is derived from non-edible oil seeds, contains calorific value is almost equal to 90% diesel. Biodiesel emits low carbon, sulfur emissions during its combustion. This research concentrates on utilization of biodiesel as a fuel in pit furnace to melt aluminum scrap. An attempt is made to study the performance of Karanja biodiesel on pit furnace. The developed furnace melts 20 kg of aluminum in 40 minutes and attains a maximum temperature of 10000C. The thermal efficiency of furnace is found to be 18.71%. Normal thermal efficiency of pit furnace lies between 4-19 %. The furnace is fitted with medium exhaust pipe for easy escape of combustion gases. The blower is used to supply air and to atomize the fuel into the furnace chamber. The top surface of furnace is closed to avoid conventional and radiation losses. An air gap is provided as insulation of furnace. This furnace can effectively be used in academic laboratories to melting of nonferrous metal.

Keywords

Aluminum, Biodiesel, Performance, Pit furnace, Thermal Efficiency.

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A. Nanda Kumaar ¹, K. Deventhiran ¹, M. Santhana Kumar ¹, M. Manoj Kumar ¹, R. Suresh ¹

Affiliations
1 Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai -600062, Tamil Nadu, IN

Abstract

Background/Objectives: Construction industry is a key industry contributing to the economic growth and development of a nation. It is essential, the consultant and contractor to establish harmonious working relationships among them, and resolves issues in a timely manner, minimizing impact on project execution. This paper assesses the perceptions of top and small and medium project management consultants and contractors about each other. Methods/Statistical Analysis: This was done by first identifying the problems between them, followed by a comprehensive data collection through questionnaire surveys. Findings: Application/Improvements: Respondent agreed that entry of project management consultants into industry was very essential and it has improved the whole industry. Mutual opinions between contractors and consultants were also obtained and well-studied. Top and small and medium class respondents vary in their opinions. Improvements: This project could found out the serious relationship issues between the consultants and contractors and the influence of project management consultants in the industry.

Keywords

Construction, Contractors, Consultant, Project Management, Project Management Consultant

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A. Ashokkumar ¹, R. Suresh ¹, R. Anitha Selvakumari ¹, K. Gayathiri ¹, D. Tamilselvi ¹, S. Abirami ¹

Affiliations
1 Department of Civil Engineering, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai - 600062, Tamil Nadu, IN

Abstract

Background/Objectives: The experimental investigations are carried out to study the behaviour of Glass Fiber Reinforced Polymer (GFRP) sheet not wrapped and wrapped around RC column. Methods/Statistical analysis: Strength of the RC column was assessed by performing compressive and split tensile strength tests at the interval of 7, 14, and 28 days as per code of provision. Findings: In this study, the recycled aggregate has been replaced with the natural aggregate. The replacement percentage was chosen for this study was 10%, 20%, 30%, 40%, and 50%. The compressive strength of partial replacement of recycled coarse aggregates (PRRCA) are found to be higher than the compressive strength of normal concrete. Furthermore, results on load, deflection and failure modes of each of the columns were also obtained. Applications/Improvements: Strength of the damanged concrete structures can be improved after wrapping GFRP sheet over the damaged structures.

Keywords

Axial Load, Fiber Reinforced Polymer, Identified Deficiencies, Recycled Coarse Aggregate, Wrapping

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C. Banupriya ¹, Sharon John ¹, R. Suresh ¹, E. Divya ¹, D. Vinitha ¹

Affiliations
1 Department of Civil Engineering, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai – 600062, Tamil Nadu, IN

Abstract

Objective: This study mainly focused on use of quarry dust on replaced with river sand for making geopolymer bricks and paver blocks. Method: Investigations were done on usage of eco-friendly Geopolymer Concretes in lieu of OPC concrete for producing geopolymer bricks and paver blocks. Fly ash, GGBS, aggregates and pellet form of sodium hydroxide were mixed together, then, distilled water was added to form alkaline condition. After one-day period, sodium silicate solution was mixed with concrete mixtures to prepare geopolymer concrete. The geopolymer concrete specimen were tested against compressive strength, split tensile strength and flexural strength. Findings: GPCC with 50% sand and 50% quarry dust produced excellent compressive strength, flexural strength and split tensile strength. GPC paver block using 75% GGBS and 25% fly ash shows excellent compressive strength. Geopolymer brick using 65% FA&35% GGBS produced good compressive strength. Applications/Improvements: A high volume fly ash based geopolymer concrete (mix proportion of 65, 70, 75 and 80% FA) used for bricks and high volume ground granulated blast furnace slag based geopolymer concrete (mix proportion of 65, 70, 75 and 80% GGBS) used for pavers blocks.

Keywords

Fly Ash, Geopolymer Bricks, GGBS, Paver Blocks, Quarry Dust

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Sharon John ¹, C. Banu Priya ², Y. Preethy Dharanya ¹, Meera Muthulakshmi ¹, R. Suresh ¹, M. S. Dinesh Kumar ¹, M. S. Hari Krishnan ¹

Affiliations
1 Department of Civil Engineering, Vel Tech High Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Chennai - 600062, Tamil Nadu, IN
2 Department of Civil Engineering, Vel Tech Engineering College, Chennai - 600062, Tamil Nadu, IN

Abstract

Objectives: Numerical investigations were done using corroded and uncorroded coupons, thereby for casting its prevention for the deterioration of structures. Methods/Statistical Analysis: Structural steel which is widely used is almost prone to corrosion in aggressive environments. Consistent replacement of the corroded member is uneconomical and therefore its yield strength has to be determined in order to estimate its reduced stresses of the members. This paper presents the numerical modelling of 4 coupons extracted from angle of 50x50x5mm and 7 coupons extracted from 80NB (nominal bore) mild steel sections subjected to different level of corrosion. The stress strain characteristics for both angular and tubular coupons were obtained from the analyses and verified with the experimental values. Findings: The stress strain characteristics for both angular and tubular coupons were obtained from the analyses and verified with experimental data. The analysis proved to produce excellent results with less than10% difference from its experimental results. Applications: This paper concludes with the numerical studies carried out on stress strain characteristic behavior of corroded coupons extracted from angle and tubular sections. The numerical modeling has been done based on the finite element method in which corroded coupons through experiment has been extracted and simulated using discretisation technique. Later compared and validated with experimental results obtained. This paper presented that due to corrosion in structural steel the yield stress had been reduced than in uncorroded coupons and the corrosion causes loss of mechanical strength on the specimen. The tensile test from the experiment and the numerical investigation provided excellent result while in comparison. It was observed that due to corrosion the physical property of steel was reduced and strength degradation occurred. Hence the numerical modelling technique could determine the stress strain characteristics of coupons successfully without any economic constraints.

Keywords

Coupons, Numerical Study, Stress-Strain Analysis

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