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Bahurudeen A.,Indian Institute of Technology Madras | Marckson A.V.,Sathyabama University | Kishore A.,NIT Trichy | Santhanam M.,Indian Institute of Technology Madras
Construction and Building Materials | Year: 2014

Sugarcane bagasse ash is a by-product from sugar industries and can be used as supplementary cementitious material in concrete. The development of new cementitious blends with processed sample of sugarcane bagasse ash is described in this paper. Utilization of various supplementary cementitious materials significantly influences fresh and hardened properties of concrete. Interaction of pozzolanic material with cement and chemical admixtures produces diverse effects in the fresh properties of blended cement concrete. This paper aims to ascertain the effect of different bagasse ash replacements of cement on the compatibility with superplasticizers in cement paste. Sugarcane bagasse ash based Portland pozzolana cements were produced with three different levels of replacement - 10%, 15%, and 20%. Marsh cone and mini-slump test were used to determine the effect of superplasticizer type and water binder ratio on the saturation dosage. From this study, it was observed that polycarboxylic ether based superplasticizer was more compatible with bagasse ash blended cement than sulphonated naphthalene based superplasticizer. © 2014 Elsevier Ltd. All rights reserved.

Kumar N.P.,Vellore Institute of Technology | Arungalai Vendan S.,Vellore Institute of Technology | Siva Shanmugam N.,NIT Trichy
Journal of Alloys and Compounds | Year: 2016

Aluminium alloy sheets are find utility in various diversities of industrial sectors due to its multifunctional features and global suitability. There have been several literatures reporting mechanical and microstructure analysis and suitability of joining of this material using various welding techniques. Subsequently, it has been proved successful for several welding processes irrespective of the heat flow phenomenon. However, the width of heat affected zone remains a challenge for all the conventional processes. In view of this, it is observed that cold metal transfer technique appears to reduce the HAZ width due to its low heat input to the base metal which is the most prominent feature of the process. In this paper, the effect of welding current and welding speed on heat input, depth of penetration, weld pool width, reinforcement height, dilution, weld bead contact angle parameters during cold metal transfer (CMT) process is investigated. The outcome of this research study is expected to provide a thorough insight into the heat input, strength, microstructures of weld zone and integrity of the weldments for different trails of welding current and welding speed which facilitates in determining the optimized parameter range. © 2015 Elsevier B.V.

Konda D.,NIT Trichy | Bhoopanam K.,NIT Trichy | Subramanian S.,Indian Institute of Technology Madras
Studies in Computational Intelligence | Year: 2014

Path planning is one of the most important navigation schemes of any autonomous robot. The time complexity of the algorithm and the length of the path generated determine the quality of the algorithm. Hence it is necessary to select a proper algorithm for better path planning of a robot. This chapter provides a survey of the global path planning methods for Autonomous Underwater Robots (AUR). The algorithms are developed in C++ language and the generated paths are shown using MATLAB environment. In order to analyze the efficiency of the algorithm for global path planning various mazes and conditions are considered. The time complexity by means of the number of clock cycles taken for the completion of the program execution is calculated for each algorithm. The various algorithms and the simulations results are presented in detail. © Springer International Publishing Switzerland 2014.

Mouli P.V.S.S.R.C.,Vellore Institute of Technology | Janakiraman T.N.,NIT Trichy
Communications in Computer and Information Science | Year: 2011

An unsupervised and robust algorithm for segmenting color images using graph theoretic concepts is proposed in this paper. A novel region growing procedure is proposed for cycle (segments) formation and cycle merging. Experiments were carried out on standard Berkeley Segmentation Database Set (BSDS) and other public domain images and the results show the efficacy of the proposed method. © 2011 Springer-Verlag.

Anand R.,National Institute of Technology Tiruchirappalli | Kannan G.R.,NIT Trichy | Nagarajan S.,NIT Trichy | Velmathi S.,NIT Trichy
SAE Technical Papers | Year: 2010

Waste cooking oil methyl ester (WCO-ME) is produced by the transesterification of waste cooking oil (WCO) on laboratory scale setup and it can be used as a biodiesel in stationary diesel engine. The proceeding study investigates the effect of biodiesel and its blends varying from B10 to B80 on the engine performance, emission and combustion characteristics. The properties of diesel and biodiesel are examined and compared. The experimental results show that the use of WCO-ME in an unmodified direct injection diesel engine has yielded higher brake specific fuel consumption (BSFC) due to low calorific value. It is also observed that at full load the brake specific energy consumption of biodiesel blends are higher than that of diesel. Further, biodiesel blends show a reduction in emission properties such as carbon monoxide (CO), carbon dioxide (CO2), unburnt hydrocarbon (UHC) and smoke opacity with slight increase in nitric oxide (NO) emission compared to diesel at full load. Overall combustion characteristics for all blends are found to be quite similar to that of diesel. Hence, the WCO-ME is a promising diesel fuel substitute that can be produced by recycling waste cooking oil without any engine modification and furthermore, becoming less dependent on fossil oil imports thereby decreasing the environmental pollution. Copyright © 2010 SAE International.

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