Browsing Research Articles (Civil Engineering) by Title

Browsing Research Articles (Civil Engineering) by Title

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  • Case study – testing of geogrid at Exxaro Coal Mpumalanga and implications for future use 
    Van Aswegen, Francois; Rautenbach, Reinard; Gomes, Desiree; De Bruyn, Frederick; Kamper, Maarten (South African Institution of Civil Engineering, 2019-07)
    In August 2017 GIBB (Pty) Ltd was requested by Exxaro Coal Mpumalanga to conduct a detail design in order to upgrade one of their existing gravel access roads to surface standard at Matla Mine in Kriel, Mpumalanga. The ...
  • 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, ...
  • Centrifuge and numerical modeling of liquefied flow and nonliquefied slide failures of tailings dams 
    Charles, W.W.; Crous, Petrus A.; Jacobsz, Schalk Willem (American Society of Civil Engineers, 2023-09)
    Tailings dams have relatively high failure rates throughout the world and the consequences of these failures often result in significant loss of life and damage to the environment and property. However, the triggers and ...
  • A centrifuge for TUKS 
    Jacobsz, Schalk Willem (South African Institution of Civil Engineering, 2012-04)
    No abstract available.
  • 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 ...
  • Centrifuge modelling of piled foundations in swelling clays 
    Gaspar, Tiago Alexandre Valentim; Jacobsz, Schalk Willem; Smit, G.; Osman, A.S. (Canadian Science Publishing, 2024-01)
    A study aimed towards assessing the variation in shaft capacity of piled foundations in swelling clays is presented. At the clay's in-situ water content, the results of pull-out tests on short-length piles revealed no ...
  • Centrifuge modelling of railway embankments under static and cyclic loading 
    Vorster, P.; Grabe, Petrus Johannes; Jacobsz, Schalk Willem (Southern African Institute for Industrial Engineering, 2017-09)
    With past embankment failures on the heavy haul coal export railway line between Ermelo and Richards Bay in South Africa, a study was conducted focusing on the modelling of embankments in a geotechnical centrifuge. This ...
  • Challenges confronting road freight transport and the use of vehicle-pavement interaction analysis in addressing these challenges 
    Steyn, Wynand Jacobus Van der Merwe; Monismith, C.L.; Nokes, W.A.; Harvey, J.T.; Holland, T.J.; Burmas, N. (South African Institution of Civil Engineering, 2012-04)
    Traditional arguments for maintaining riding quality of pavement are expanded in this paper to examine the effects of deteriorating riding quality on vehicle operating costs, freight damage and logistics. The objectives ...
  • Characterisation of rigid polyurethane foam‑reinforced ballast through cyclic loading box tests 
    Du Plooy, R.F.; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2017)
    As train speeds and heavy haul axle loads constantly increase due to market demands, so do the stresses and strains experienced by track structures. This is especially true for track transitions that generate high dynamic ...
  • Characterisation of the hydration products of a chemically and mechanically activated high coal fly ash hybrid cement 
    Du Toit, Grizelda; Van der Merwe, E.M. (Elizabet Margaretha); Kruger, Richard A.; McDonald, James M.; Kearsley, Elsabe P. (MDPI, 2022-01-27)
    Cement companies are significant contributors of the planet’s anthropogenic CO2 emissions. With increased awareness of the substantial volume of CO2 emissions from cement production, a variety of mitigation strategies ...
  • Chemical acceleration of a neutral granulated blast-furnace slag activated by sodium carbonate 
    Kovtun, Maxim; Kearsley, Elsabe P.; Shekhovtsova, Julia (Elsevier, 2015-06)
    This paper presents results of a study on chemical acceleration of a neutral granulated blast-furnace slag activated using sodium carbonate. As strength development of alkali-activated slag cements containing neutral GBFS ...
  • Chemical and mechanical activation of hybrid fly ash cement 
    Du Toit, Grizelda; Kearsley, Elsabe P.; Mc Donald, James M.; Kruger, Richard A.; Van der Merwe, E.M. (Elizabet Margaretha) (Thomas Telford, 2018)
    Hybrid fly ash cement is a binder with a composition between that of pozzolanic fly ash cement and alkali-activated fly ash cement. Its production requires less cement clinker than ordinary Portland cement, facilitating ...
  • Classification of mountain bike trails using vehicle-pavement interaction principles 
    Steyn, Wynand Jacobus Van der Merwe; Van Niekerk, Handre; Jacobs, Wietsche M.G.; Jenkins, Kim (Southern African Alliance for Sport Science, Physical Education and Recreation, 2014)
    Various mountain bike trails exist in South Africa, but their difficulty ratings are generally unknown. By classifying the trails, risk of injury and uncertainty can be limited as information are provided on the difficulty ...
  • Collapse potential of partly saturafed sandy soils from Mozal, Mozambique 
    Rust, Eben; Heymann, Gerhard; Jones, Gary (South African Institution of Civil Engineering, 2005)
    There is an upsurge in development along the eastern coast of southern Africa that creates the need to re-examine the typical red sands which occur from northern Mozambique to the south coast of KwaZulu-Natal in South-Africa.
  • Collapsible soils an overview 
    Rust, Eben; Heymann, Gerhard; Jones, Gary (South African Institution of Civil Engineering, 2010-04)
    Collapse potential in unsaturated soil was first identified and quantified by researchers in South Africa. A landmark paper was published by Ken Schwartz in 1985 presenting the state of the art at that time. Since then, ...
  • Combining energy recovery and leakage reduction in water distribution networks 
    Bonthuys, Gideon Johannes; Van Dijk, Marco (South African Institution of Civil Engineering, 2019-06)
    Energy consumption in water supply and distribution networks represents 7% of the world’s consumption of energy. According to the Key World Energy Statistics published by the International Energy Agency, the water ...
  • Comparative assessment of the interlayer shear-bond strength of geogrid reinforcements in hot-mix asphalt 
    Walubita, Lubinda F.; Nyamuhokya, Tito P.; Komba, Julius Joseph; Tanvir, Hossain Ahmed; Souliman, Mena I.; Naik, Bhaven (Elsevier, 2018-12)
    With the increasing use of geogrid reinforcements to mitigate reflective cracking in hot-mix asphalt (HMA) overlays, interlayer (interface) bonding has become an even more critical aspect of HMA placement/construction to ...
  • Comparing the factors of safety from finite element and limit equilibrium analyses in lateral support design 
    Potgieter, Jean; Jacobsz, Schalk Willem (South African Institution of Civil Engineering, 2019-12)
    Soil-nails and anchors as means of lateral support in surface excavations require stability analyses as part of design. Generally, the acceptance criterion is some arbitrary ‘factor of safety’ which can be routinely ...
  • Comparison between bracing requirements using various codes and a proposed new set of bracing criteria 
    Burdzik, W.M.G.; Dekker, N.W. (South African Institution of Civil Engineering, 2002)
    The notable increase in problems related to the bracing of timber roofs clearly indicates that the time is ripe to seriously consider amended rules governing the design of such bracing. Burdzik et a1 have proposed a set ...
  • Comparison of bitumen–rubber use in extreme conditions in Russia and South Africa 
    Visser, Alex T.; Duhovny, George S.; Sachkova, Alice V. (Taylor and Francis, 2017)
    The development of the use of crumb rubber from used tyres in asphalt started in the USSR during the 1960s independently and in parallel with the research in the USA and Western World during the 1970s. The result is that ...