Indexing

Abstract:This research is concerned with the analysis of noncircular journal bearings taking deformability of the bearings liner and variation of viscosity due to the presence of various additives in the lubricant. A survey of literature shows that a few investigations have been carried out oncircular bearings operating with micropolar lubricants. Literatures are available on static analysis of such bearings, but literature on dynamic analysis is scarce. Literature survey also shows that no work has been carried out on EHD analysis of circular and non circular bearings operating with micropolar lubricants. So it is felt that there is a need to compute static and dynamic characteristics of elastohydodynamic journal bearings operating with micropolar lubricants.
Keywords:Introduction, Bearingbehaviour with micropolar fluid, Reynolds equation, performance characteristics.
Title:Elastohydrodynamic Analysis of Elliptical Bearing with Micropolar Fluid
Author:Hemant Kumar Sharma, Rajkishore Singh
ISSN 2393-8471
International Journal of Recent Research in Civil and Mechanical Engineering (IJRRCME)
Paper Publications

Abstract:Concrete is a widely-used material in construction industry, because it has naturally and easily available ingredients like cement aggregate and water.  Production of cement creates environmental problem like emission of CO₂ in the production process of cement. So, there is serious need to find ways and means to reduce CO₂ emission. To overcome this problem Ground Granulated Blast Furnace Slag (GGBS), which is a pozzolanic material can be used as a partial replacement to cement. The main components of GGBS are CaO (30-50%), SiO₂ (28-38%), Al₂O₃ (8-24%), and MgO (1- 18%). In general, increase in CaO content of the slag increases slag basicity and thereforeimproves the compressive strength. As it is available from the literature, strength and durability are the two important mechanical properties to make reliable concrete. However, durability studies on medium and high strength concrete over different replacement levels of GGBS are limited. In the present study, GGBS was replaced with cement to obtain the influence of GGBS in normal and high strength concrete on durability properties. Comparisons were made with different percentage of replacements of GGBS for cement, which helped to arrive at the optimum percentage of replacement. Cement was replaced by GGBS at 0, 20, 30, 40 and 50% by weight of cement in conventional concrete and high strength concrete. Over 200 cubes and cylinders were casted, cured and tested for 28 and 56 days. Various durability tests were conducted on specimens and also water absorption test was conducted. Standard test procedure has been followed as per the codal provisions. Results were tabulated systematically, illustrative graphs were developed and the variation of durability properties is discussed in detail. It was observed from the investigation that as the percentage of GGBS increased, enhancement of durability properties was observed up to a certain level of percentage and further shown declination.

Keywords:Ground Granulated Blast Furnace Slag (GGBS), Water Absorption, High Strength Concrete.
Title:Assessment of Water Absorption Capacity of Concrete with GGBS Replacement
Author:Mallikarjun Hulagabali, Dr. R. Prabhakara, Anand Hulagabali
ISSN 2393-8471
International Journal of Recent Research in Civil and Mechanical Engineering (IJRRCME)
Paper Publications