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International Journal of Advanced Scientific Engineering and Technological Research
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 1839-7239 - ISSN (Online) 1839-7239
   This journal is no longer being updated because:
  • Existing Parking Situation and demand analysis of New Market Area

    • Authors: Panini Amin chowdhury
      Abstract: In the age of supreme urbanization, many new inventions and lifestyles are added in our life which brings both comfort and also headache. The use of automobile vehicles is one of them. For automobiles, parking is a must especially in the market area. But if it is not adequate, then the whole comfort and convenience will dust in air. This paper is about a market place of Chittagong which is also known as the zero point of Chittagong, new market, which is now suffering innumerable problems due to haphazard parking and inadequate parking lot. This paper mainly emphasizes on the existing parking situation and demand of this location.
      PubDate: 2014-01-08
      Issue No: Vol. 2 (2014)

    • Authors: Sunday Joshua Ojolo
      Abstract: Machining involves the thermal, elastic and plastic deformations of the surface layer which result in strain hardening, structural changes and development of residual stresses. These cause surface irregularities which may increase the risk of fatigue failure of material during usage. This study involves the investigation of the influence of cutting speed, feed rate and tool geometry on the fatigue life of end-milled specimens of 2024-aluminium alloy using a design of experiment approach. The experimental design constructed was such that the specimens were subjected to different machining conditions. Data analysis was carried out with ReliaSoft OfficeTM 7 DOE++ software and Analysis of Variance (ANOVA). The study showed that by decreasing the feed rate and increasing the cutting speed significantly resulted in a higher fatigue life. Whereas, the rake angle had the least significant effect on the fatigue life, it was discovered that the feed rate was found to be the most influential factor.
      PubDate: 2014-01-08
      Issue No: Vol. 2 (2014)
  • Assessment of Recycling Aggregate as Construction Materials

    • Authors: Bulbul Ahmed, Mst. Tasrima Sultana, A. S. M. Z. Hasan, Habiba Tabassum
      Abstract: Large volume of waste materials is produced every year. These large volumes recycled aggregates to assess further utilization for construction works. A number of laboratory tests such as specific gravity and absorptions test, aggregate crushing value test, aggregate impact value test, Loss Angeles abrasion test, compaction test, CBR test, compressive strength test, splitting test were conducted to evaluate the materials properties. The test results show that the bulk specific gravity is 1.78 both for fresh and waste aggregates, the apparent specific gravity is 2.44 both for fresh and waste aggregates, the aggregate crushing value of fresh aggregate and waste coarse aggregate is 31.01% & 34.10% respectively, the aggregate impact value of fresh aggregate and waste aggregate is 15.56 %  & 17.04% respectively, the Loss Angeles abrasion value of fresh coarse aggregate is 42.20%, where as for the waste coarse aggregate the same value is 43.43 %, the maximum dry density is 1.74 for fresh aggregate and 1.71 for waste aggregate, the CBR of waste aggregate is 61.50 % for soaked condition and 68.88 % for unsoaked condition, the compressive strength of waste aggregate is 5.50Mpa for 7 days curing and 10.43 Mpa for 28 days curing, the tensile strength of waste aggregate is 1.11 Mpa for 7 days curing and 1.37Mpa for 28 days curing. The properties of fresh and recycled aggregate are compared to the standard specifications. The result of recycled aggregates confirmed that they can be used as C.C works, sub base, temporary structures.
      PubDate: 2014-01-08
      Issue No: Vol. 2 (2014)

    • Authors: Sunday Joshua Ojolo
      Abstract: This work involves the investigation carried out to study the effect of machining parameters on tool life under dry machining environment. Three cutting tool materials (HSS blank tool - M2 C66, tungsten carbide insert tool grade P-10, DMNG carbide insert tool 150412-SA) and three work materials (medium carbon steel 0.4 wt% C, mild steel 0.29 wt% C, brass C330) were examined. The experiments were conducted under three different spindle speeds (900, 1120, 1400rev/min); feed rates (0.1, 0.2, 0.3mm/rev) and depths of cut (0.5, 1.0, 1.5mm). The settings of machining parameters were determined by using the Taguchi experimental design method. The level of importance of the machining parameters on tool life was determined by using analysis of variance (ANOVA). The optimum machining parameters combination was obtained by using the analysis of signal-to noise (S/N) ratio. The relationship between cutting parameters and tool life was obtained. From the results, the spindle speed has the most significant effects on tool life followed by feed rate and the depth of cut. The life of the HSS when cutting the work pieces (medium carbon steel, mild steel and brass) was 161s, 321s and 386s respectively. The life of tungsten carbide when cutting the three work materials was 480s, 726s and 1028s respectively. The life of DMNG carbide were 782s using medium carbon steel, 864s using mild steel, 1183s using brass). The shortest life of the three cutting tool material (HSS, tungsten carbide and DMNG carbide) on the three work material (medium carbon steel, mild steel and brass) occurred at cutting speed (1400 rev/min), feed rate (0.3 mm/rev) and depth of cut (1.5 mm), where the life of the HSS were (15s using medium carbon steel, 58s using mild steel, 94sec using brass), the life of tungsten carbide were (135s using medium carbon steel, 180s using mild steel, 274s using brass) and the life of DMNG carbide were (219s using medium carbon steel, 215s using mild steel, 311s using brass). The increment of spindle speed, feed rate and depth of cut value mostly will affect the tool life.
      PubDate: 2014-01-08
      Issue No: Vol. 2 (2014)
  • Effect of Burnt Solid Wastes on Shear Strength Behavior of Granular Soil

    • Authors: Md. Motiur Rahman
      Abstract: The purpose of this study is to observe the shear strength behavior of granular soil with presence of burnt solid wastes. The shear strength of soil is an important term in most of the foundation engineering problems such as the bearing capacity of shallow foundation, slope stability of dam/embankment and lateral earth pressure on retaining walls. In this study burnt solid waste is mixes up to 20% with granular soil. A series of direct shear test were conducted on two types of dry sandy soils (taken from Rangpur and Rajshahi areas of Bangladesh) with various percentage of burnt solid waste. In all, 11 specimens of each type of soils were considered for direct shear test with dry condition at a constant density. The specimens were prepared by static compaction with different percentage of burnt solid waste from 0% to 20% at same void ratio. Experiment result shows that cohesion increase and angle of internal friction slightly decrease but the combined effect i.e. Shear strength increase with increase of burnt solid wastes.
      PubDate: 2014-01-08
      Issue No: Vol. 2 (2014)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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Fax: +00 44 (0)131 4513327
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