Department of Civil Engineering
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Traffic characteristics and bridge loading in South Africa
(Journal of the South African Institution of Civil Engineering, 2017-12)ENGLISH ABSTRACT: The loading model of the Technical Manual for Highways (TMH-7) published for bridge design in South Africa is in need of revision and simplification. The frequency of heavy vehicle loads has increased ...
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Sewer network design : heuristic algorithm for hydraulic optimisation
(South African Institution of Civil Engineering, 2017-09)ENGLISH ABSTRACT: For a given sewer network layout and choice of pipe material, the total installed cost of the network is determined mainly by the pipe diameters and slopes. Hydraulic design optimisation is the task of ...
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Revised regional sediment yield prediction methodology for ungauged catchments in South Africa
(South African Institution of Civil Engineering, 2017-06)ENGLISH ABSTRACT: This paper presents the research on the revision of the regional probabilistic method (Rooseboom et al 1992) for the prediction of catchment sediment yields in South Africa. The determination of sediment ...
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Review of climatic input data for wind load design in accordance with SANS 10160-3
(South African Institution of Civil Engineering, 2017-12)ENGLISH ABSTRACT: With the publication of Part 3 Wind Actions of the South African Loading Code SANS 10160:2010, several issues concerning adjustments from the reference standard Eurocode EN 1991-1-4:2004 could not be ...
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Planning for desalination in the context of the Western Cape water supply system
(South African Institution of Civil Engineering, 2017-03)ENGLISH ABSTRACT: As water demands continue to grow, South Africa is starting to consider seawater desalination as a potential future supply source, and it is currently being investigated at a feasibility level in a number ...
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Development of an updated fundamental basic wind speed map for SANS 10160-3
(South African Institution of Civil Engineering, 2017-11)ENGLISH ABSTRACT: This paper evaluates the need for updating the strong wind climate stipulations of South Africa for the design of structures in accordance with SANS 10160-3:2010, as based on the latest information presented ...
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An investigation into the evidence of seasonal rainfall pattern shifts in the Western Cape, South Africa
(South African Institution of Civil Engineering, 2017-12)ENGLISH ABSTRACT: Climate change is a highly contentious topic in the modern world. There is much evidence to indicate that climatic shifts and extreme weather anomalies are taking place globally, in some places more ...
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Alternative wall‑to‑slab connection systems in reinforced concrete structures
(South African Institution of Civil Engineering, 2017-09)ENGLISH ABSTRACT: In many reinforced concrete structures the walls precede the construction of the connecting floors. A system is, therefore, required to connect the floors to the already cast walls. There are many different ...
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Interventions to promote the use of seat belts
(Cochrane, 2014-07-24)This is the protocol for a review and there is no abstract. The objectives are as follows: To assess the effects of interventions promoting the use of seat belts.
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Supplementary household water sources to augment potable municipal supply in South Africa
(South African Water Research Commission, 2017-10)ENGLISH ABSTRACT: This paper addresses on-site supplementary household water sources with a focus on groundwater abstraction, rainwater harvesting and greywater reuse as available non-potable water sources to residential ...
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Corrosion deterioration of steel in cracked SHCC
(SpringerOpen, 2017)The presence of cracks is unavoidable in reinforced concrete structures and also a gateway for chloride into concrete, leading to corrosion of steel reinforcing bars. So, crack control, crack width limitation and chloride ...
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A conceptual theoretical framework to integrally assess the possible impacts of climate change on domestic irrigation water use
(South African Water Research Commission, 2015-10)Southern Africa is likely to experience higher evapotranspiration and altered rainfall characteristics due to global warming and climate change. Climate-driven water use may potentially stress water supply facilities due ...
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Potable water use of residential consumers in the Cape Town metropolitan area with access to groundwater as a supplementary household water source
(South African Water Research Commission, 2016-01)The potable water use recorded by 3 579 residential consumer water meters in Cape Town, South Africa, was analysed as part of this research. The focus was on elected residential properties in serviced areas, with additional ...
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Feasibility and geotechnical design of subsurface dams in dry ephemeral rivers for the augmentation of shallow groundwater supply
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Recent droughts and projected climate changes in South Africa make it an essential priority to augment water availability, particularly in the most vulnerable rural communities. The Molototsi River, a ...
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Estimating outdoor water use allowing for the possible impacts of climate change
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Climate change may stress water supply systems due to both diminishing water resources and rising climate driven water use. Reducing the sensitivity of residential outdoor water use to climatic factors ...
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The effect of controlled pressure adjustment on consumer water demand in an urban water distribution system
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Pressure management is commonly employed as part of water conservation and water demand management strategies in water distribution systems (WDS). Most of the earlier work on this subject focussed on ...
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Development of a procedure for separately allocating water leakage and other types of non-metered water to nodes in the hydraulic model
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The correct allocation of water loss to nodes in hydraulic models of water distribution systems is an important consideration for the purposes of designing such systems. Some components of total water ...
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An assessment of the inherent reliability of SANS 10162-2 for cold-formed steel columns using the direct strength method
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: With their thin and slender nature, Cold formed Steel (CFS) elements can be forged into a large variety of cross sections. It is recommended that the Direct Strength Method (DSM), a modern design method, ...
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The minimum site investigation requirements needed to define site conditions considering the results of ground investigations and its true reflection of actual site conditions found during construction
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The success of civil engineering projects, whether it involves the construction of houses, bridges, roads or tunnels, depend largely on the adequate identification of subsurface conditions. Geotechnical ...
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Target reliability of concrete structures governed by serviceability limit state design
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Structures are typically designed for the ultimate limit state (ULS) while the serviceability limit state (SLS) is checked. However, in many cases the design is governed by SLS requirements. The target ...
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Model for predicting creep of cracked steel fibre reinforced concrete
(2018-03)ENGLISH ABSTRACT: The investigation of the creep of cracked fibre reinforced concrete has gained momentum over the past few years. However, there is still no proposed model of how to include the additional creep caused by ...
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Optimality in sewer network design
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Sewer networks form a vital part of urban infrastructure and represent a capital intensive expense in the public sector. In South Africa, a recent estimation stated that R44.75 billion is required to ...
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The effect of fire on hydrological response and the subsequent effect on streamflow
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Fire is a destructive force that destroys thousands of hectares of both urban and rural vegetation in South Africa every year. Fire not only destroys vegetation, but also affects the infiltration and ...
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A design function for bitumen stabilised material performance based on laboratory and field evaluation
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The use of stabilised granular materials for road pavements are ever increasing throughout South Africa. There are currently two commonly used methods for the stabilisation of granular materials in road ...
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Modelling the shrinkage behavior of recycled concrete aggregate and cement stabilised materials
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Cement stabilisation of subbases is an effective method to increase the strength, permeability, stability and performance of a pavement structure. Stabilisation is used to improve marginal quality materials, ...
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Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Advancement in new technologies and methods of producing foaming agents have resulted in enhanced possibility of a structurally performing lightweight concrete. Lightweight foamed concrete (LWFC) is a ...
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The performance properties of recycled concrete in road pavement materials
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Due to a rise in population and industrialisation, the demand on infrastructure in developing countries have increased significantly. The world has been moving towards a more environmentally friendly and ...
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Relationship between the age related performance of a typical bituminous binder in South Africa and the fatigue performance of the asphalt mixture
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The primary factor affecting the durability of bituminous binders is ageing. Ageing causes an increase in stiffness which leads to non-load associated cracking in asphalt mixtures. Laboratory ageing has ...
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Carbonation of cement stabilised materials in pavement layers
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: The remarkable increase in global traffic has encouraged innovative pavement designs capable of satisfying environmental, economic and social needs. The construction and demolition industry has had a major ...
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Performance testing of enrobés à module elevé asphalt
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Enrobés à Module Elevé (EME), is a French based technology developed during the 1980’s and utilises a low penetration bitumen at high binder contents to produce a very stiff asphalt, which has superior ...
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