American Journal of Civil Engineering

Volume 4, Issue 5, September 2016

  • Chitosan as a Drinking Water Treatment Coagulant

    Frederick W. Pontius

    Issue: Volume 4, Issue 5, September 2016
    Pages: 205-215
    Received: 14 July 2016
    Published: 15 July 2016
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    Abstract: Inorganic aluminum or iron salts have been used for many decades to coagulate colloidal particles in surface water prior to flocculation, sedimentation and/or filtration. Although effective, inorganic coagulants have several disadvantages including large chemical dosages required for treating eutrophic waters, large volumes of chemical sludge produ... Show More
  • A Fixed Platform Topside Piping System Strength Analysis Under Dynamic Pigging/Slugging Loads

    Zhongwei Li, Heng Gu

    Issue: Volume 4, Issue 5, September 2016
    Pages: 216-224
    Received: 18 July 2016
    Published: 19 July 2016
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    Abstract: This paper presents the strength analysis of a fixed platform topside piping system under dynamic pigging/slugging load. Flow assurance analysis by using OLGA provided the flow history in each pipe. Then the dynamic loads at each pipe elbow were added by time sequence onto ANSYS model. The analysis has shown overstressed region under new pigging/sl... Show More
  • Relevance of Contractors’ Prequalification Criteria to Time Performance of Civil Engineering Project

    Ologunagba Mulikat Modupe, Akinmusire Adeleye Ola

    Issue: Volume 4, Issue 5, September 2016
    Pages: 225-232
    Received: 27 June 2016
    Accepted: 11 July 2016
    Published: 28 July 2016
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    Abstract: Civil engineering project completion within predetermined time schedule is usually the desire of the client and every other stakeholder. This has been a mirage because project in this case often fails to meet time target as a result of challenges emanating from its various peculiar characteristics. Civil engineering project completion within estima... Show More
  • Dynamic Analysis of High Building with Cracks in Column Subjected to Earthquake Loading

    Nguyen Thai Chung, Hoang Hai, Shin Sang Hee

    Issue: Volume 4, Issue 5, September 2016
    Pages: 233-240
    Received: 25 June 2016
    Accepted: 11 July 2016
    Published: 2 August 2016
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    Abstract: This paper is devoted to studying the dynamic response of a high building on an elastic foundation with cracks on the column of the building under earthquake loading using the finite element method (FEM). The authors used a 3D modeling frame - plate system and integration method developed by Newmark, along with construction calculation programs in ... Show More
  • Improvement of Sub Base Soil Using Sand-Cement Stabilization

    Md. Mahmud Hasan Mamun, Md. Firoz Mahmood Ovi, Farhana Akhter, Saurav Barua, Mohiuddin Ahmed, Thahomina Jahan Nipa

    Issue: Volume 4, Issue 5, September 2016
    Pages: 241-246
    Received: 22 June 2016
    Accepted: 15 July 2016
    Published: 3 August 2016
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    Abstract: Sand is the most available construction material in Bangladesh. Sand- cement stabilization is more cost effective and environment friendly for the construction of sub-base pavement layer in perspective of Bangladesh. The researchers conducted an investigation for the use of cement stabilized fine to medium sand in the construction of roads. Sands f... Show More
  • Parametric Study of the Lateral Behavior of Cast in Drilled Hole Piles

    Samir Abdul Baki Jabbar Al-Jassim, Rafi Mohammed Qasim

    Issue: Volume 4, Issue 5, September 2016
    Pages: 247-253
    Received: 8 July 2016
    Accepted: 18 July 2016
    Published: 15 August 2016
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    Abstract: A cast in drilled hole (CIDH) piles are to be used as a bridge foundation. The geotechnical data of the site indicate that the soil profile consist of 10m normally consolidated soft clay underlined by a thick layer of over consolidated stiff clay. Three different pile diameters of 1.6m, 1.8m and 2m are selected from the analysis to be used for a de... Show More
  • Occupational Accident Patterns and Prevention Measures in Construction Sites in Nairobi County Kenya

    Raymond Kemei, Julius Nyerere

    Issue: Volume 4, Issue 5, September 2016
    Pages: 254-263
    Received: 31 July 2016
    Accepted: 11 August 2016
    Published: 29 August 2016
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    Abstract: Construction accidents don’t just happen, they are initiated by unsafe acts, unsafe conditions or both. The construction industry in Kenya plays a vital role in achieving social and economic development goals, providing shelter, infrastructure, and employment. A study was carried out to identify the common accidents in construction sites and to exa... Show More