Browsing Research Articles (Civil Engineering) by Author "Steyn, Wynand Jacobus Van der Merwe"
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Browsing Research Articles (Civil Engineering) by Author "Steyn, Wynand Jacobus Van der Merwe"
Now showing items 1-20 of 35
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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, ...
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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 ...
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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 ...
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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 ...
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Steyn, Wynand Jacobus Van der Merwe; Warnich, Janike; Engelbrecht, Japie (Southern African Alliance for Sport Science, Physical Education and Recreation, 2014)Tyre-road rolling resistance is a major factor in the performance of a vehicle. By investigating the rolling resistance, a better understanding of the efficiency of different wheel diameters will develop. A major issue in ...
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Wessels, Illeze; Steyn, Wynand Jacobus Van der Merwe (Taylor and Francis, 2020)Roads need to be continuously monitored and maintained to ensure that they offer a driving surface that effectively address the safety and comfort needs of road users. Well maintained roads are also vital for freight ...
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Beriha, Brundaban; Sahoo, Umesh C.; Steyn, Wynand Jacobus Van der Merwe (Elsevier, 2019-09)Perpetual pavements are in existence since 1960 with satisfactory performance. These pavements are usually designed based on the endurance limit property of bound pavement materials, which is the critical stress or strain, ...
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Development of a saturation- and stress-dependent chord modulus model for unbound granular material Van Aswegen, Elsabe; Steyn, Wynand Jacobus Van der Merwe; Theyse, Hechter L. (South African Institution of Civil Engineering, 2015-06)Unbound granular material is used in the pavement structure and usually comprises the bulk of the structural and foundation layers of a typical South African pavement. The term unbound granular material refers to the ...
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Mshali, M.R.S. (Mike); Steyn, Wynand Jacobus Van der Merwe (Taylor and Francis, 2022)The road network in South Africa, particularly in urban areas, is experiencing a steady increase in traffic volumes and congestion. Speed has a significant effect on the response of flexible pavement systems to traffic ...
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Jordaan, Gerrit Jacobus; Steyn, Wynand Jacobus Van der Merwe (MDPI, 2021-10-18)Nanoscale organofunctional silanes have been developed, tested and successfully applied to protect stone buildings in Europe against climatic effects since the 1860s. The same nanotechnologies can also be used in pavement ...
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Jordaan, Gerrit Jacobus; Steyn, Wynand Jacobus Van der Merwe; Broekman, Andre (MDPI, 2021-03)Emulsion stabilisation of base layers surfaced with chip seals often proves problematic, with chips punching into the base and early distress. This can be aggravated by the use of modified binders that restricts the ...
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Steyn, Wynand Jacobus Van der Merwe; Briedenhann, R. (American Society of Civil Engineering, 2012-04)Surfacing seals consist of a combination of bitumen and aggregate, and are used to provide an all-weather surfacing to protect underlying layers and provide safe access to vehicles traveling on a road. Analysis of a ...
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Steyn, Wynand Jacobus Van der Merwe; Visser, Alex T. (National Academy of Sciences, 2011-07)Stabilization of unpaved (mostly low volume) roads using non-traditional stabilizers has received attention over the last number of years as various types of these stabilizers are developed and become available. Evaluation ...
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Dreyer, C.M.W. (Catharine Maria Willemien); Steyn, Wynand Jacobus Van der Merwe (South African Institution of Civil Engineering, 2015-09)Deteriorating riding quality has a negative impact not only on infrastructure, but on the road user as well. Road users experience higher vehicle operating costs (VOCs), longer travel times, congestion and uncomfortable ...
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Steyn, Wynand Jacobus Van der Merwe; Nokes, B.; Du Plessis, L.; Agacer, R.; Burmas, N.; Popescu, L. (Transportation Research Board of the National Academies, 2015-06)Road condition affects the operations and costs of vehicles that use the infrastructure. Various models of vehicle operating cost provide an indication of the effects of road roughness on fuel consumption, additional damage ...
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Matheba, M.J.; Steyn, Wynand Jacobus Van der Merwe; Moloisane, R.J.; Milne, T.I. (South African Institution of Civil Engineering, 2015-09)There is a significant increase in traffic loading on most roads in the developing African countries, and South Africa is one of them. Often this increased traffic loading results in the premature failure of pavement ...
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Fedrigo, William; Visser, Alex T.; Steyn, Wynand Jacobus Van der Merwe; Núñeza, Washington Peres (Taylor and Francis, 2021)This paper focuses on the flexural behaviour of lightly cement stabilised materials. An experimental programme was developed to analyse the effects of compaction method, test setup and displacement rate on the static ...
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Jordaan, Gerrit Jacobus; Steyn, Wynand Jacobus Van der Merwe (MDPI, 2021-02)Good transportation systems are pre-requisites to economic development. Empirically developed, archaic test methods are traditionally used for materials classification used in road construction. This system normally ...
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Steyn, Wynand Jacobus Van der Merwe; Maina, J.W. (James) (Elsevier, 2019-06)There is much research conducted on the vehicle technologies required for operation of autonomous vehicles (AV) on public roads, as well as analysis of the interaction between AV and the road environment. However, limited ...
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Steyn, Wynand Jacobus Van der Merwe (South African Institution of Civil Engineering, 2010-09)Pavement Interactive, an online pavement community built on an open-source wiki platform, is a novel and possible approach to giving distance training to South African and southern African roads professionals in various ...
Now showing items 1-20 of 35