iosr-JMCE   Volume-17 ~ Issue-4 ~ Jul. - Aug. 2020

Abstract: Soil treatment is an essential concern for geotechnical engineers. The aim soil treatment is to improve the properties of problematic soil such as stability, strength and erosion resistance. Conventional soil treatment materials have several shortcomings, especially from environmental stand point. Therefore various biological approaches recently have been explored as environmental friendly alternatives in geotechnical engineering. This study investigate the potential of two biopolymers xanthan gum and chitosan(environmental friendly)in strengthening of clayey soil. Xanthan gum is a polysaccharide which is commonly used in food industry as an additive and chitosan which is synthesized from shrimp shell waste. These two biopolymers are added in the soil separately to evaluate its potential on mechanical properties of clay soil at different concentration, mixing conditions and curing periods.....

Keywords: Stabilization, Xanthan gum, Chitosan, SEM, UCS

[1]. Nader Hataf, Pooria Ghadir, Navid Ranjbar, Investigation of soil stabilization using chitosan biopolymer, Journal of Cleaner Production 170 (2018) 1493- 1500
[2]. Ilhan Chang, Jooyoung Im, Awlia Kharis Prasidhi, Gye-Chun Cho, Effects of Xanthan gum biopolymer on soil strengthening, Construction and Building Materials 74 (2015) 65–72
[3]. D.V.S.Sankara Reddy, K.Kowshik, M.Jugal Kishor, Investigation of Chitosan Bio- Polymer Effect on the Geotechnical Properties of an Expansive Soil, Proceedings of International Conference on Recent Trends in Engineering, Materials, Management and Sciences ICRTEMMS-2018
[4]. Ashwin Balaji P, Ananthan S, Rakesh K, Bharath Kumar P, Ms. M. Padmapriya, potential of natural bio-polymers in stabilization of soil, International Research Journal of Engineering and Technology (IRJET) , Volume: 06 Issue: 04 (2019) e- ISSN: 2395-0056, p-ISSN: 2395-0072
[5]. Lekshmi P. Nair, K. Kannan, Assessment of Kuttanad Soil Stabilized with Biopolymers, International Journal of Research in Engineering, Science and Management Volume-2, Issue-2 (2019).

Abstract: Background: One of the emerging trends in achieving sustainable construction is through the application of green materials in construction. Green materials are materials which are environmentally friendly, use less natural resource and energy, and generate less CO2 during production. This study evaluated the effect of Dracaena Arborea (DA) and Carica Papaya (CP) leaves extracts as potential bio-based admixture in cement mortar. Materials and Methods: Dracaena Arborea (DA) and Carica Papaya (CP) leaves extracts were characterized in terms of their phytochemicals and added to ordinary Portland cement/sand mix of 1:3 ratio in dosage of 1, 2, 3 and 4%. Setting time of the cement paste samples were evaluated using a standard vicat apparatus. A total of one hundred and twenty......

Key Word: Dracaena Arborea (DA), Carica papaya (CP), Setting Time, Portland cement, mortar.

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Abstract: Design of heat exchanger for refrigeration system, involves improving the performance. The high performance of refrigeration system can be achieved by some of the factors such as enhanced heat exchanger, using appropriate cross section of the heat exchanger and using the high-performance refrigerants. This review paper :- 1) provides an overview on two phase flow condensation of a R1234yf and R134a refrigerants, 2) address the condensation in heat exchanger which is, influenced by various factors, 3) provides information about the correlations of Heat Transfer Coefficient (HTC) which is influenced by various factors. Finally from the literature it is concluded that, HTC increases with increasing in vapor quality. And also pressure drop increases with increasing....

Key Word: Heat Transfer coefficient (HTC), Roughness, Pressure drop, Reynolds number (Re) and Nusselt number (Nu).

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[5]. Andrea Diani, R1234yf condensation inside a 3.4 mm ID horizontal microfin tube, international journal of refrigeration 75 (2017)178-189

Abstract: Soil is one of the important materials in a variety of construction projects including pavements, earth canals and earth dams. Most of the failures of soil have been due to its poor strength. Usage of chemical admixtures such as cement, lime, bitumen etc. in soil stabilization is highly expensive. Therefore it's preferable to replace these by another kind of soil addictive to make them economical and eco-friendly. In our study we will do an experimental study on stabilization of Cochin clay using eggshell powder and plastic waste in varying proportions. Three various proportions of eggshell powder (2%, 5%, 8%) plastic wastes (0.25%, 0.5%, 0.75%, 1%) were added to obtain optimum percentage of each additive. The analysis was done by compaction, unconfined compression.....

Key Word: Eggshell powder; Plastic waste; Optimum percentage; Compaction; Unconfined compression strength; Mathematical modelling

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