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Journal of the South African Institution of Civil Engineering最新文献

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The variability in commercial laboratory aggregate testing for road construction in South Africa 南非道路建设商业实验室骨料测试的可变性
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/V63N1A4
I. J. Breytenbach, H. Fourie
{"title":"The variability in commercial laboratory aggregate testing for road construction in South Africa","authors":"I. J. Breytenbach, H. Fourie","doi":"10.17159/2309-8775/2021/V63N1A4","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/V63N1A4","url":null,"abstract":"DR IZAK BREYTENBACH (Pr Sci Nat) obtained his PhD in engineering geology at the University of Pretoria in 2016 and is a registered professional natural scientist. He works as an engineering geological and geotechnical consultant in multiple fields. He has extensive experience in identifying and investigating potential new hard rock aggregate sources, or investigating existing material sources, specifically for the supply of road construction aggregate.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A self-calibrating model to estimate average speed from AADT 从AADT估计平均速度的自校正模型
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/v63n2a2
M. Bruwer
{"title":"A self-calibrating model to estimate average speed from AADT","authors":"M. Bruwer","doi":"10.17159/2309-8775/2021/v63n2a2","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/v63n2a2","url":null,"abstract":"ABSTRACT Transport practitioners need a universally applicable speed prediction model to estimate average speeds on any road. Average annual speed is a key input to the economic assessment of transport infrastructure where reliable estimates of future average speeds are necessary to calculate economic costs and benefits. The relationship between Annual Average Daily Traffic (AADT) and average annual speed was investigated on higher-order roads across South Africa, revealing a high level of variability in this correlation at different locations. This variation is influenced by road characteristics, such as alignment and cross-section, complicating the formulation of a universal speed prediction model. Two novel speed prediction models are proposed in this article that use AADT to forecast future average annual speed. The speeds of heavy vehicles and light vehicles can be estimated separately, as well as the average speed of all vehicles simultaneously. Both models are self-calibrating, accounting for the variation in the AADT-speed relationship. This calibration step is unique to speed prediction models and increases the reliability of these models to estimate future average speeds considerably. Furthermore, self-calibrating average annual speed prediction models are universally applicable and will simplify economic assessment of transport infrastructure. Keywords: speed prediction, average annual speed, self-calibration, AADT, economic assessment","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Review of compatibility between SANS 10400 deemed-to-satisfy masonry wall provisions and loading code 审查被认为满足砌体墙规定和荷载规范的SANS 10400之间的兼容性
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/V63N1A5
W. I. D. Villiers, G. V. Zijl, W. Boshoff
{"title":"Review of compatibility between SANS 10400 deemed-to-satisfy masonry wall provisions and loading code","authors":"W. I. D. Villiers, G. V. Zijl, W. Boshoff","doi":"10.17159/2309-8775/2021/V63N1A5","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/V63N1A5","url":null,"abstract":"DR WIBKE DE VILLIERS is a senior lecturer at Stellenbosch University, where she obtained her BEng (2006), MSc Eng (2008) and PhD (2019), the latter in the development of performance-based specifications for alternative masonry units. As part of the Unit of Construction Materials, her research interests lie in alternative and sustainable construction materials, and their structural and thermal performance. She has supervised a number of postgraduate students and authored or co-authored several publications over the past nine years. Prior to this, she spent two years at Aurecon as a structural design engineer.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reliability performance of bridges designed according to TMH7 NA load model 根据tmh7na荷载模型设计桥梁的可靠性性能
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/V63N1A3
R. Lenner, S. E. Basson, M. Sýkora, P. Sýkora
{"title":"Reliability performance of bridges designed according to TMH7 NA load model","authors":"R. Lenner, S. E. Basson, M. Sýkora, P. Sýkora","doi":"10.17159/2309-8775/2021/V63N1A3","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/V63N1A3","url":null,"abstract":"PROF ROMAN LENNER (PE) is an Associate Professor at Stellenbosch University in the Department of Civil Engineering. His main research interests include structural reliability, bridge loading, target reliability and assessment of existing structures. He is a member of the Joint Committee on Structural Safety, serves as Chair of the IABSE South Africa National Group, is a member of the Editorial Board of Structural Engineering International, and is a member of the IABSE TG1.3‐working group.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Prediction of water reuse potential in South African water management areas: A linear regression and Bayesian network approach 南非水管理地区水再利用潜力的预测:线性回归和贝叶斯网络方法
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/v63n2a1
S. Mamane, A. Abimbade, A. Ilemobade
{"title":"Prediction of water reuse potential in South African water management areas: A linear regression and Bayesian network approach","authors":"S. Mamane, A. Abimbade, A. Ilemobade","doi":"10.17159/2309-8775/2021/v63n2a1","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/v63n2a1","url":null,"abstract":"ABSTRACT Increasing scarcity of freshwater resources and growing environmental awareness have given rise to the use of treated wastewater as an additional source of water supply. However, the amount of wastewater that can be reclaimed for reuse is subject to many factors, ranging from technical to socio-economic, environmental and institutional. This paper presents two prediction models for wastewater reuse potential in South Africa. The proposed models, namely a Bayesian Network model and a Linear Regression model, were used as a platform for integrated analysis of features such as water use, and socio-demographic and environmental factors. A dataset from the sub-regions of the 19 water management areas in South Africa was employed as input into the models in order to analyse these features and to consequently predict water reuse potential. Keywords: water reuse, wastewater recycling, Bayesian network, linear regression","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reliability basis for assessment of existing building structures with reference to sans 10160 现有建筑结构可靠性评估依据sans 10160
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/V63N1A1
M. Holicky, J. Retief, C. Viljoen
{"title":"Reliability basis for assessment of existing building structures with reference to sans 10160","authors":"M. Holicky, J. Retief, C. Viljoen","doi":"10.17159/2309-8775/2021/V63N1A1","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/V63N1A1","url":null,"abstract":"PROF DR MILAN HOLICKÝ obtained his Civil Engineering degree at the Czech Technical University in Prague, his PhD at Waterloo, Canada, and his DrSc (h.c.) from the Moscow State University of Civil Engineering. He is currently employed at the Klokner Institute, Czech Technical University in Prague, and is an Extraordinary Professor at Stellenbosch University, South Africa. He is involved in the research of structural reliability and risk assessment. He has written or co-authored more than 300 scientific and technical publications, textbooks and five monographs, and is actively participating in international research within CIB, JCSS ISO, CEN TC250 Structural Eurocodes, and is project leader on the assessment of existing structures.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A critical review of the Water Sorptivity Index (WSI) parameter for potential durability assessment: Can WSI be considered in isolation of porosity? 对用于潜在耐久性评估的水吸附性指数(WSI)参数的重要回顾:是否可以将WSI与孔隙度分开考虑?
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/v63n2a4
A. J. Moore, A. T. Bakera, M. Alexander
{"title":"A critical review of the Water Sorptivity Index (WSI) parameter for potential durability assessment: Can WSI be considered in isolation of porosity?","authors":"A. J. Moore, A. T. Bakera, M. Alexander","doi":"10.17159/2309-8775/2021/v63n2a4","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/v63n2a4","url":null,"abstract":"ABSTRACT The Durability Index (DI) approach used in South Africa is linked to transport-related properties of the cover layer of concrete. This performance-based approach utilises three different durability-related parameters, namely Water Sorptivity Index (WSI), Oxygen Permeability Index (OPI) and Chloride Conductivity Index (CCI). In the water sorptivity test, both the sorptivity and the water-penetrable porosity of the concrete are measured. Until now, porosity has not been considered directly as a separate durability-related parameter. This paper analyses these implications and suggests that porosity should be adopted as a further index. The paper concludes that sorptivity cannot be interpreted without also reflecting the porosity value since these two parameters are inter-related. Keywords: concrete durability, durability index, water sorptivity, porosity, absorption","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Measurement of probabilistic ballast particle dynamics using Kli-Pi 利用Kli-Pi测量概率压舱粒子动力学
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/V63N1A2
A. Broekman, P. Grabe
{"title":"Measurement of probabilistic ballast particle dynamics using Kli-Pi","authors":"A. Broekman, P. Grabe","doi":"10.17159/2309-8775/2021/V63N1A2","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/V63N1A2","url":null,"abstract":"ANDRÉ BROEKMAN is full-time PhD student and researcher in the Civil Engineering Department at the University of Pretoria, South Africa. In 2018 he obtained his MEng degree in Transportation Engineering (cum laude) under supervision of Prof Hannes Gräbe, having graduated with a BEng Hons Transportation degree (cum laude) in 2017 and a BEng Civil Engineering degree (cum laude) in 2016 at the University of Pretoria. He is also responsible for lecturing undergraduate students in the field of instrumentation design and assists with the development of new instrumentation hardware, software and communications technologies (Civiltronics) for undergraduate and post-graduate research projects.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Design and construction of laboratory-scale activated carbon, gravel and rice husk filter columns for the treatment of stormwater runoff from automobile workshops 设计和建造实验室规模的活性炭、砾石和稻壳过滤柱，用于处理汽车车间的雨水径流
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2021-01-01 DOI: 10.17159/2309-8775/2021/V63N1A6
C. O. Ataguba, I. Brink
{"title":"Design and construction of laboratory-scale activated carbon, gravel and rice husk filter columns for the treatment of stormwater runoff from automobile workshops","authors":"C. O. Ataguba, I. Brink","doi":"10.17159/2309-8775/2021/V63N1A6","DOIUrl":"https://doi.org/10.17159/2309-8775/2021/V63N1A6","url":null,"abstract":"ENGINEER CLEMENT OGUCHE ATAGUBA is a lecturer at the Federal Polytechnic, Idah, in Nigeria, where he teaches civil and water resources engineering courses at both National and Higher National Diploma levels. His research interests are in water quality/treatment, municipal waste management, water sanitation and hygiene (WASH), and the application of computer technology in water resources and sanitation facilities management. He is currently a PhD student at Stellenbosch University.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Laboratory performance and modelling behaviour of hot-mix asphalt with recycled crushed glass 再生碎玻璃热拌沥青的实验室性能和建模行为
IF 0.4 4区 工程技术
Journal of the South African Institution of Civil Engineering Pub Date : 2020-09-01 DOI: 10.17159/2309-8775/2020/v62n3a2
T. George, J. Anochie-Boateng, K. Jenkins
{"title":"Laboratory performance and modelling behaviour of hot-mix asphalt with recycled crushed glass","authors":"T. George, J. Anochie-Boateng, K. Jenkins","doi":"10.17159/2309-8775/2020/v62n3a2","DOIUrl":"https://doi.org/10.17159/2309-8775/2020/v62n3a2","url":null,"abstract":"DR JOSEPH ANOCHIE-BOATENG, who holds a PhD in Civil Engineering from the University of Illinois at Urbana-Champaign, USA, joined the Council for Scientific and Industrial Research (CSIR) in 2008. He pioneered and leads the investigation into the potential utilisation of crushed glass as a substitute for natural aggregate in asphalt mixes in South Africa. He also led the development of various manuals, guidelines and test protocols to support the pavement and asphalt industries in South Africa and Tanzania. Through his research work he developed research topics for postgraduate students from the University of Pretoria, Tshwane University of Technology and University of Stellenbosch. He works closely with the South African Road Federation (SARF) on an asphalt mix design course to develop the necessary skills for southern Africa.","PeriodicalId":54762,"journal":{"name":"Journal of the South African Institution of Civil Engineering","volume":"62 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43259721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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