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Journal Cover American Journal of Civil Engineering and Architecture
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  This is an Open Access Journal Open Access journal
   ISSN (Print) 2328-398X - ISSN (Online) 2328-3998
   Published by Science and Education Publishing Homepage  [72 journals]
  • Adoption of the Building Information Modeling (BIM) for Construction
           Project Effectiveness: The Review of BIM Benefits

    • Authors: Lancine Doumbouya; Guoping Gao, Changsheng Guan
      Pages: 74 - 79
      Abstract: Building Information Modeling (BIM) has recently attracted extensive attention in the Architectural, Engineering and Construction (AEC) industry with an increase in the use of information technology, all the while increasing productivity, efficiency, infrastructure value, quality, and sustainability, rendering a purer image of constructability issues that are dealt with at the beginning of the construction process. The purpose of this study is to better comprehend the BIM benefits and to analyze BIM adoption, thus providing better understanding of BIM and its usefulness in various stages of the construction projects. Our review concludes that BIM fulfills its purpose through all the stages of the construction project delivering benefits in terms of improved design quality, easiness to implement, information sharing ability, reduction of construction costs and design errors, faster work and shortening the construction time, enhancing energy efficiency, supporting construction and project management, and enabling its owners more operational efficiency in the building lifecycle. The current research identifies relevant factors and outcomes of BIM, and sets up a framework for a future study. The critical review of BIM benefits contributes to the existing body of literature on AEC and BIM.
      PubDate: 2016-4-22
      Issue No: Vol. 4, No. 3 (2016)
  • Investigation of Afram Shale for Road Construction

    • Authors: Yaw A. Tuffour; Samuel Y. Banini, Charles A. Adams
      Pages: 80 - 83
      Abstract: Road construction projects in the Afram Plains area in Ghana are characterised by high material haulage cost due to the unavailability of suitable geologic materials local to the area for road work and the need to haul from distant sources. This study investigated the suitability of rock-like shale local to the Plains for road construction in the area. Samples of the rock-like shale from the Plains were evaluated in terms of strength as coarse aggregates and as compacted material before and after being subjected to soaking as well as varying cycles of soaking and drying. The soaking and drying simulated conditions under which pavement structures exist in the area over their design life due to the heavy rainfall in the Plains and the poor drainage characteristics of the terrain. The results indicated that whereas the rock-like shale in the un-soaked state met all the Ministry of Roads and Highways strength specifications for road aggregates, it lost practically all its strength in the soaked state. Water absorption was 900% the specification upper limit. Compacted samples lost close to 90% in CBR value following four days soaking. The high loss in strength under wetting conditions and the material’s ability to imbibe large amounts of water do not favour the use of the Afram shale for road construction in the long-term, given the fact that there are ample opportunities, within the area, for the material to come into contact with water for a long time when existing as part of a pavement structure.
      PubDate: 2016-5-3
      Issue No: Vol. 4, No. 3 (2016)
  • A Model Development to Adaptive Reuse of Iranian Qajar Houses: An Approach
           to Sociocultural Concept(A Case: Nasir Al-Din Mirza House)

    • Authors: Seyed Gholamreza Islami; Davood Dehghan, Hasan Sadeghi Naeini
      Pages: 84 - 89
      Abstract: This study aims to formulate the most influential factors in the decision making process for the Reuse of abandoned historic houses in Tehran. Nasir Al-Din Mirza House as a case study was selected as this house has a traditional pattern which has evolved over thousands of years. However, due to the changes in lifestyle, it has been abandoned. Granting a new type of land use to architectural heritage which can no longer keep their main land-use is the best way to save them. This heritage is rich in historical-cultural values that must be transferred to the next generations. Granting new type of land-use, in addition to honoring these buildings, upgrades the identity and vitality of urban sites. Moreover, besides attracting foreign tourists, this heritage would be converted to an entertainment place for domestic tourists. in this descriptive study , interviews, in depth-observations, impressions, and library studies were used to gather appropriated data. Multiple Attribute Decision Making (MADM) technique was used to data analysis. Finally, identifying the most significant factors and weighting them, two types of land use including restaurants and coffee shops with the highest points were proposed. The most influential factors of such a selection were comments of the concerned individuals including experts, locals and tourists, lack of damage caused by the new reuse to the current form, all parts of the building not being blocked by the new reuse to be visited by tourists as well as the proper relationship between the new reuse and the surrounding site.
      PubDate: 2016-5-10
      Issue No: Vol. 4, No. 3 (2016)
  • Effect of Functionalization and Mixing Process on the Rheological
           Properties of Asphalt Modified with Carbon Nanotubes

    • Authors: Ibrahim Amin; Sherif M. El-Badawy, Tamer Breakah, Mourad H. Z. Ibrahim
      Pages: 90 - 97
      Abstract: The aim of this paper is to investigate the rheological properties of conventional asphalt modified with Multi- Walled Carbon Nano Tubes (MWCNTs). Pristine MWCNTs were chemically modified using acid functionalization process to introduce carboxylic acid groups onto the surface of MWCNTs. The pristine and functionalized MWCNTs were then characterized by Scanning Electron Microscope (SEM) and electron dispersion X-ray (EDX) analysis. A 3% (by weight of asphalt) of pristine and functionalized MWCNTs were each blended with a base asphalt at 120°C. The properties of the base and modified asphalts were evaluated using softening point, rotational viscometer and dynamic shear rheometer (DSR) for both original and short term aged asphalts using the rolling this film oven (RTFO) test. The results indicated that the use of MWCNTs as a modifier was helpful in improving the conventional and rheological properties of the asphalt. Generally, it was found that the softening point, as well as the rotational viscosity, were increased and the temperature susceptibility was improved. The results showed a remarkable improvement in the binder complex shear modulus, failure temperature, and rutting resistance. The rheological properties of the asphalt modified with pristine MWCNTs were better than the functionalized MWCNTs. Finally, the effect of mixing technique (high shear mixer and a manufactured mechanical mixer) of MWCNTs with asphalt was evaluated. Results showed that both mixers yielded similar properties based on the rotational viscosity testing.
      PubDate: 2016-5-14
      Issue No: Vol. 4, No. 3 (2016)
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