New M.E.Thesis Submitted from Civil (Geotechnical)

Experimental Study of Characteristics of Soil Processed With Fly Ash & RECRON 3S by Gaurav Dhiman

Abstract

Soil is omnipresent material naturally in the universe and is the cheapest available construction material. As clay shows unfavourable behaviour as high shrinkage, swell characteristics and low bearing capacity, there is need to improve the strength characteristics. The aim of this research is to study the characteristics of soil when processed with fly ash and recron 3s. The method used in the research is randomly distributed fibre reinforcement soil also termed as RDFS. The objective of study

is to is increase the strength of clayey soil using recron 3s fibre and fly ash. The research was focused on to improve the strength of soil and to obtain a optimum amount of soil-fly ash-recron 3s mix. The proportions used of fly ash were 10, 15, 20, 30, 40 and 50% and recron 3s was in 0.2, 0.4, 0.6, 0.8 and 1.0% in amount by weight. In this study number of compaction test, unconfined compressive strength test and direct shear test were performed. From proctor test it was determined that O.M.C increases and M.D.D decreases with increase in fly ash and recron 3s. The fly ash was optimized at 15% and was used for further work. U.C.S value for virgin soil was 213.67 kN/m2, by adding fly ash it was increased to 458.13 kN/m2 at 15% fly ash. On addition of recron 3s strength was increased and maximum was at 0.8% i.e. 685.24 kN/m2 for 1 week curing and 723.87 kN/m2 for 2 week curing period. The results of direct shear were for virgin soil as cohesion intercept 25.78 and angle of shearing resistance 20.47˚ were increased on addition of fly ash and recron 3s to cohesion intercept 67.26 kN/m2 and angle of shearing resistance 28.66˚. From the experimental results it was concluded that recron 3s work as reinforcing material and provides strength to the soil as well as fly ash worked as cementing material. The preeminent proportion obtained was 82.2% soil – 15% fly ash – 0.8% recron 3s fibre.

New M.E.Thesis Submitted from Production

Experimental Investigation on Modelling of Surface Grinding Process:A Green Manufacturing Approach by Manjot S. Bedi 

Abstract

In today’s scenario, the major focus is on the wellbeing of mankind and environment. For this, in the field of manufacturing, every possible attempt has been made to make the manufacturing processes environment friendly and safer for the health. This gave birth to a unique approach of Green manufacturing. Green manufacturing involves the use of energy efficient, non-polluting techniques for making the products. The concept of Green manufacturing has been emerged as a result of the efforts of technologists for providing ecological conditions on the shop floor. The main source of health hazards in machining operations is cutting fluids. These fluids are composed of minerals and synthetic compounds. A number of methods like Minimum Quantity Lubrication (MQL), dry machining, cryogenic machining have been suggested to eradicate the pollution problems. In the present work, the concept of green manufacturing has been applied on surface grinding process, which is one of the main processes leading to aerosol or particulate pollution. There are some research gaps to achieve the objectives of Green Machining processes In this study, some parameters like cutting force, specific energy, aerosol generation and surface roughness are experimentally monitored, and compared with the existing theoretical model. In the present work, a model is referred from Stephen Malkin’s Grinding Technology (1989). From the plots of experimental data and theoretical model data, it was observed that the model is significant up to much extent with today’s manufacturing scenario. It shows that dry machining, which is considered to be most ecofriendly, leads to high aerosol generation, high surface roughness and consumes more force and energy. On the other hand, the flood and MQL methods are somewhat comparable to each other but overall the MQL method leads the other two techniques in all the three spheres of mechanical, quality and health considerations.