American Journal of Civil Engineering

Volume 9, Issue 2, March 2021

  • Analytical Elastoplastic Solutions for Deep-buried Circular Tunnels Under Asymmetric Load

    Zhang Xin, Zhang Xiangping, Wang Zhang, Lang Min, Zhao Suzhi, Du Yuxiang, Sun Jinshan

    Issue: Volume 9, Issue 2, March 2021
    Pages: 31-38
    Received: 5 January 2021
    Published: 12 April 2021
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    Abstract: The elastoplastic analysis of the surrounding rock of a circular tunnel is a very classic rock and soil mechanics problem. Previous scholars usually studied the situation under axisymmetric load, and they usually did not take the non-axisymmetric load distribution under the influence of ground stress and lateral pressure into account, which greatly... Show More
  • Modeling Sediment Yield-Case Study Guder Watershed, Blue Nile Basin, Central Ethiopia

    Gonfa Erena, Dereje Adeba

    Issue: Volume 9, Issue 2, March 2021
    Pages: 39-46
    Received: 9 February 2021
    Accepted: 24 March 2021
    Published: 23 April 2021
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    Abstract: Guder watershed is one of the watershed found in Blue Nile basin, central Ethiopia, mostly eroded area due to the widespread of agricultural land. This study is based on the Soil and Water Assessment Tool (SWAT) model interface of GIS environment to simulate sediment yield of the watershed at outlet. The stream flow was calibrated for ten years (19... Show More
  • Experimental Study on Interface Strength Between Hardened Cement Paste-Aggregate

    Wenliang Han, Hongfa Yu, Haiyan Ma

    Issue: Volume 9, Issue 2, March 2021
    Pages: 47-54
    Received: 9 March 2021
    Published: 26 April 2021
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    Abstract: The interfacial transition zone (ITZ) is a weak part of concrete, which is the main reason that the mechanical properties of concrete are far lower than those of hardened cement paste and aggregate itself. In order to improve the mechanical properties of concrete ITZ, the effects of cement varieties, water-binder ratio, mineral admixtures and aggre... Show More
  • Cause of Construction Material Wastage on Public Building Project in Western Oromia

    Garba Wokjira Fayisa, Shiferaw Garoma Wayessa

    Issue: Volume 9, Issue 2, March 2021
    Pages: 55-62
    Received: 13 February 2021
    Accepted: 29 March 2021
    Published: 26 April 2021
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    Abstract: In the construction industry, construction material is one of the major cost components and it is 50% to 70% of the total construction cost. However, the industry generates 30%-65% of wastage for landfill. Effective use of construction material is profitable in the industry as well as in the economy of any country. However, material wastage managem... Show More