Browsing Research Articles (Civil Engineering) by Issue Date

Browsing Research Articles (Civil Engineering) by Issue Date

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  • Performance of resilient rail pads used in Tubular Modular Track under South African service conditions 
    Lubout, Neil; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2012-05)
    Of the many requirements modern railways must meet, those of safety, speed, efficiency and cost-effectiveness are paramount. These requirements have been the driving force for railway engineers to develop new and innovative ...
  • Tapping untapped renewable energy 
    Van Dijk, Marco; Van Vuuren, Fanie; Bhagwan, Jay; Kurtz, Adriaan (South African Institution of Civil Engineering, 2012-06)
    In water distribution networks in South Africa, water is often fed under gravity from a higher reservoir to another reservoir at a lower level. The high pressure head at the receiving reservoir is then dissipated through ...
  • The discontinuity required at an air valve or vent for effective pipeline de-aeration 
    Van Vuuren, S.J.; Van Dijk, Marco (South African Institution of Civil Engineering, 2012-10)
    The location and sizing of air valves to ensure effective de-aeration of pipelines and to provide vacuum break capability was researched. Based on these findings, software was developed to evaluate gravity and pumping ...
  • Influence of mica on unconfined compressive strength of a cement-treated weathered granite gravel 
    Mshali, M.R. (Mike); Visser, Alex T. (South African Institution of Civil Engineering, 2012-10)
    The road construction industry faces a shortage of naturally occurring gravel materials that meet the requirements for base or even at times sub-base quality. This situation is exacerbated in some cases by the occurrence ...
  • Definition and application of a cohesive crack model allowing improved prediction of the flexural capacity of high-performance fibre-reinforced concrete pavement materials 
    Denneman, Eric; Kearsley, Elsabe P.; Visser, Alex T. (South African Institution of Civil Engineering, 2012-10)
    In conventional concrete pavement design methods the design parameters are determined using linear elastic analysis. Concrete is subject to significant size effect and as a result linear elastic design concepts, such as ...
  • The use of recycled building materials as aggregate for concrete 
    Kearsley, Elsabe P.; Mostert, H.F. (Concrete Society of Southern Africa, 2012-11)
    Please read abstract in article.
  • Gautrain state of good repair : three years after the first trains were commissioned 
    Van der Westhuizen, N.J.; Powell, Alex; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2013)
    With government-owned assets and the sustainability of service delivery a primary objective, the "State of Good Repair" of the Gautrain rapid rail system will in future play a fundamental role in determining its quality ...
  • Using multi-source GPS data to characterize multiday driving patterns and fuel use in a large city region 
    Venter, C.J. (Christoffel Jacobus); Joubert, Johan W. (Transportation Research Board of the National Academies, 2013)
    The paper describes the use of GPS data obtained from both commercial and project-specific sources to examine the travel behavior and fuel consumption patterns of drivers over a three-day period in Gauteng Province, South ...
  • The mass stiffness of residual dolomite from large surcharge trials 
    Jacobsz, Schalk Willem (The Geological Society of London, 2013-02)
    In South Africa, the stiffness of dolomite residuum has traditionally been viewed as relatively low. For reasons of economy, available dolomite residuum stiffness data mostly stem from plate load tests on each of the ...
  • The lurch towards formalisation : lessons from the implementation of BRT in Johannesburg, South Africa 
    Venter, C.J. (Christoffel Jacobus) (Elsevier, 2013-03)
    The City of Johannesburg, South Africa, implemented the first phase of its Bus Rapid Transit (BRT) system named Rea Vaya between 2009 and 2011. The system design and organisational arrangements drew heavily on precedents ...
  • Estimating car ownership and transport energy consumption : a disaggregate study in Nelson Mandela Bay 
    Venter, C.J. (Christoffel Jacobus); Mohammed, S.O. (South African Institution of Civil Engineering, 2013-04)
    This paper investigates energy consumption patterns by households and individuals during travel on a typical day. A methodology is developed to estimate trip-by-trip energy consumption using standard 24-hour travel survey ...
  • Centrifuge modelling of a soil nail retaining wall 
    Jacobsz, Schalk Willem (South African Institution of Civil Engineering, 2013-04)
    This paper describes a physical model of a soil nail retained excavation face which was tested in the new geotechnical centrifuge at the University of Pretoria. As centrifuge modelling is new in South Africa, a short ...
  • The development of a simplified track modulus calculation procedure 
    Mostert, Louis; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2013-05)
    With the constantly increasing demand for heavy freight transportation, railways have become an extremely important element in the economic wellbeing of any country, and particularly in a developing country like South ...
  • Application of hub-and-spoke networks in sparse markets : the case of Africa 
    Ssamula, Bridget; Venter, C.J. (Christoffel Jacobus) (Journal of Transport Economics and Policy, 2013-05)
    Hub-and-spoke networks hold promise for decreasing costs and increasing connectivity in air transport markets in countries characterised by sparse demand conditions. This paper examines suitable hub-location and network ...
  • A new test track at the University of Pretoria 
    Vorster, Daniel Jacobus; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2013-05)
    The Department of Civil Engineering at the University of Pretoria recently constructed a 30 m long railway test section on the University's Experimental Farm (better known as the "Proefplaas") in Pretoria. The track will ...
  • Comparison of isotropic and cross-anisotropic analysis of pavement structures 
    Steyn, Wynand Jacobus Van der Merwe; Maina, J.W. (James); Repsold, Anton (Chinese Society of Pavement Engineering, 2013-07)
    In most existing pavement design methods, pavements are analyzed using linear elastic multilayer theory, with the assumption that isotropic conditions are present in the structural layers of the pavement section. There are ...
  • Bloemwater head office is going green 
    Kgwale, Mokutu; Van Dijk, Marco; Bhagwan, Jay (South African Institution of Civil Engineering, 2013-08)
    British Prime Minister Winston Churchill stated the following in his speech The Locust Years in November 1936 to the House of Commons: The era of procrastination, of half-measures, of soothing and baffling expedients, of ...
  • Causes of delay in road construction projects in Malawi 
    Kamanga, Moses; Steyn, Wynand Jacobus Van der Merwe (South African Institution of Civil Engineering, 2013-10)
    A study was conducted to identify the causes of delay in completing road construction projects in Malawi. A literature review was done which yielded 72 typical causes of delay, and a questionnaire was sent to client, ...
  • The integration of railway asset management information to ensure maintenance effectiveness 
    Van der Westhuizen, N.J.; Grabe, Petrus Johannes; Ebersohn, Willem (South African Institution of Civil Engineering, 2013-10)
    The challenge to sustain railways depends on the ability to optimise the utilisation of the asset base. It demands the establishment of a continuous asset improvement process which requires maintenance personnel continuously ...
  • The use of ground-penetrating radar to develop a track substructure characterisation model 
    Vorster, Daniel Jacobus; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2013-10)
    The characterisation of track substructure is an integral component of track maintenance and rehabilitation. Traditionally this is done by determining the geotechnical properties of the discrete track formation layers ...