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American Journal of Civil Engineering and Architecture
   [17 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 2328-398X - ISSN (Online) 2328-3998
     Published by Science and Education Publishing Homepage  [19 journals]
  • Effect of End Sill in the Performance of Stilling Basin Models

    • Authors: H.L. Tiwari; Arun Goel
      Pages: 60 - 63
      Abstract: An experimental investigation on effect of end sill on the performance of stilling basin models for a non circular pipe outlet has been presented in this research paper. New physical models for non circular pipe outlet stilling basin have been developed in the laboratory. These newly models were tested in the laboratory for three Froude numbers namely Fr = 1.85, 2.85 and 3.85. The new models are developed by changing the geometry of end sill of same height while keeping the other configuration of stilling basin geometry same. Total twenty one test runs of one hour duration each were performed. The performance of the models was compared by performance number (PN) to evaluate the performance. The study indicated that, for the given Froude number range, the triangular end sill of height 1d with width 1d (slope 1V:1H), is performing better in comparison to other shapes of the end sill for the given flow conditions. The study also confirmed that there is a significant effect of the shape of the end sill geometry on the performance of the stilling basin models.
      PubDate: 2014-03-13
      Issue No: Vol. 2, No. 2 (2014)
       
  • Influence of Fibers and Fly Ash on Mechanical Properties of Concrete

    • Authors: J.N. Akhtar; T. Ahmad, M.N. Akhtar, H. Abbas
      Pages: 64 - 69
      Abstract: The Present study was carried out to evaluate the influence of addition of Fibres and Class ‘C’ Flyash on the mechanical properties of concrete. Fibre Reinforced Concrete (FRC) is very useful in extreme climate where shrinkage of concrete causes cracks. The Fibre Reinforced Flyash concrete (FRFAC) has been successfully used to minimize cavitations / damages in hydraulics structures. The FRC with and without Fly ash was tested with the fraction of volume of the steel Fibre in concrete which varied from 0.0 to 1.0%. For determining, the compressive strength & permeability cubes of 150 mm size were prepared. Nine cubes of each series were prepared; out of nine, three were used for determining the strength & permeability of cracked & un-cracked concrete. The formation of additional calcium silicate hydrates in the hydrated cement matrix because of the addition of fly ash in FRFAC results in its improved characteristics. The initial tangent modulus of FRC and FRFAC is found to be independent of the quantity of Fibers. The experimental investigation shows that the increase in the Fibre content increases the compressive strength, crushing strain and Poisson’s Ratio of FRC and FRFAC. While increasing the Fibre content, the permeability of concrete reduced. The mode of cracking has been discussed.
      PubDate: 2014-03-14
      Issue No: Vol. 2, No. 2 (2014)
       
  • Transformation of Slum and Squatter Settlements: A Way of Sustainable
           Living in Context of 21st Century Cities

    • Authors: Mania Tahsina Taher; Arefeen Ibrahim
      Pages: 70 - 76
      Abstract: The Squatter settlements in many of 21st century urban cities are inevitable phenomena. Living condition in these settlements suffer from overcrowding, inadequate accommodation, limited access to clean water and sanitation, lack of proper waste disposal system and deteriorating air quality. Squatter settlements are increasingly seen by public decision-makers as ‘slums of hope’ rather than ‘slums of despair’. There is abundant evidence of innovative solutions developed by the poor to improve their own living environments. This paper will assess the question if ideas of contemporary architecture can be implemented in providing ecological living for squatter settlements, along with a discussion on probable suggestions in relation to their daily living pattern. The paper also presents several case studies of sustainable living in high-density urban areas and slum settlements in different context, finally concludes providing some strategies and policies that might be helpful to the policy makers in providing sustainable settlement for urban squatter dwellers.
      PubDate: 2014-04-13
      Issue No: Vol. 2, No. 2 (2014)
       
  • Project Control Factors at Front End: Indian Perspective

    • Authors: Devanshu Pandit; S.M. Yadav
      Pages: 77 - 82
      Abstract: The role of project control is to create a system, procedures and tools to monitor and control project delivery. The performance measurement is carried out on continuous basis and action is taken to ensure that project performance objectives are achieved. Although considerable amount of planning and organizing is required at front end, actual monitoring takes place during implementation. Poor definition of control parameters in the front end leads to poor project control brief to the other project participants namely client, consultants and contractors It is required that project control planning should start from beginning to improve the project management efficiency. The research identifies the important project control factors in the project development stage. Two brainstorming sessions resulted in identification of 18 factors that are classified into five project control areas. Analytical hierarchy process as a group decision making tool was used to make a pair-wise comparison to assign weightage to each project control group and factor. The study of weight indicates that quality (32.71%) and safety (23.64%) controls are preferred over schedule (14.74%) and cost (12.48%). Weightage derived is used to create Project Control Index (PCI). Value of PCI helps to understand the level of project controls established in the project during project development on ongoing basis. Weights and PCI guides project manager in setting and achieving project objectives.
      PubDate: 2014-04-15
      Issue No: Vol. 2, No. 2 (2014)
       
 
 
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