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Browsing Research Publications/Outputs by Impact Area "Pavement Design and Construction"

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African case studies: Developing pavement temperature maps for performance-graded asphalt bitumen selection

Author: Mokoena, Refiloe ; Mturi, George AJ ; Maritz, Johan ; Mateyisi, Mohau ; Klein, Pieter Date: Jan 2022 The reliable performance of roads is crucial for service delivery, and it is a catalyst for domestic and cross-border spatial development. Paved national roads are expected to carry higher traffic volumes over time as a result of urbanization ... Read more
Biodiesel production potential of an indigenous South African microalga, Acutodesmus bajacalifornicus

Author: Grobler, J ; Harding, KG ; Smit, Monique ; Ramchuran, Santosh O ; Durand, P ; Low, M Date: Sep 2021 In this study, a South African indigenous microalga Acutodesmus bajacalifornicus was evaluated in different cultivation media. Eleven potential cultivation media were identified and tested on A. bajacalifornicus, a potential source for biodiesel ... Read more
The Circular Economy as Development Opportunity: Exploring Circular Economy Opportunities across South Africa’s Economic Sectors

Author: Godfrey, Linda K ; Nahman, Anton ; Oelofse, Suzanna HH ; Trotter, Douglas ; Khan, Sumaya ; Nontso, Zintle ; Magweregwede, Fleckson ; Sereme, Busisiwe V ; Okole, Blessed N ; Gordon, Gregory ER ; Brown, Bernadette ; Pillay, Boyse ; Schoeman, Chanel ; Fazluddin, Shahed ; Ojijo, Vincent O ; Cooper, Antony K ; Kruger, Daniel M ; Napier, Mark ; Mokoena, Refiloe ; Steenkamp, Anton J ; Msimanga, Xolile P ; North, Brian C ; Seetal, Ashwin R ; Mathye, Salamina M Date: Dec 2021 The intention of this book is to present the CSIR’s position and interpretation of the circular economy, and to use it to drive discussions on where immediate circular economy opportunities are achievable in South Africa. Opportunities that ... Read more
Conceptualising a benefit assessment framework for the South African National Roads Agency Ltd SOC research and development programme

Author: Rust, FC ; Sono, P ; Van Dijk, G G ; Fourie, H ; Smit, Michelle A Date: Sep 2021 In low-income countries Research and Development funding is limited and has to be invested with a view of optimum return, both economic return but also “softer” benefits such as human resource development. The assessment of these benefits is ... Read more
Contiguous aggregate packing as common principle for benchmarking asphalt density, stiffness and permeability control

Author: Horak, E ; Komba, Julius J ; Maina, J ; Sebaaly, H ; Muller, J Date: Mar 2022 Contiguous aggregates are aggregate sizes that consecutively follow a typical aggregate grading curve. Porosity calculation is possible for a binary or longer ranges of contiguous aggregates. Porosity is a fundamental density indicator and ... Read more
Correlating the asphalt-binder high-temperature properties (DSR) to HMA permanent deformation (RLPD) and field rutting: A laboratory-field study

Author: Walubita, LF ; Mahmoud, E ; Fuentes, L ; Prakoso, A ; Lee, SI ; Souliman, M ; Komba, Julius J Date: Nov 2020 Asphalt-binders are part of the key material constituents affecting the performance of hot-mix asphalt (HMA), and ultimately, the field performance of flexible pavement structures. Quite often, it is desired/useful to predict the HMA permanent ... Read more
Correlating the asphalt-binder MSCR test results to the HMA HWTT and field rutting performance

Author: Walubita, LF ; Ling, M ; Fuentes, L ; Komba, Julius J ; Mabrouk, GM Date: Sep 2022 Asphalt binder is one of the key constitutive components of hot-mix asphalt (HMA) that considerably affects its rutting performance. In particular, the high-temperature rheological properties measured from the multiple stress creep and recovery ... Read more
Design and construction of sustainable climate resilient rural access road infrastructures

Author: Komba, Julius J ; Langa, R ; Paige-Green, P ; Verhaeghe, Benoit MJA ; Mokoena, Refiloe Date: Dec 2021 The chapter is organized and structured as follows; the introduction section is followed by an overview of climate change-related challenges affecting Mozambique. The study methodology (approach) is then described, followed by a discussion ... Read more
Design and manufacturing of an aggregate abrasion test device for testing in high acceleration field

Author: Xungu, Sipho ; Mgangira, Martin B ; Giani, John C Date: Nov 2021 This paper describes the design and manufacturing of a mechanical system, the Aggregate Abrasion Test Device (AATD), which comprises of a rolling model drum, with the purpose of obtaining experimental data that is subsequently used to quantify ... Read more
Developments in Sustainable Geomaterials and Environmental Geotechnics

Author: Yao, K ; Zhenyu, M ; Komba, Julius Date: Jul 2021 This book presents the advancements in the field of sustainable materials in pavement engineering and related geotechnical engineering issues and sheds light on recent developments and advancements in characterization, design, construction, ... Read more
Investigating the use of isothermal calorimetry for predicting physical properties of cements

Author: Mokoena, Refiloe ; Motau, T ; Mturi, George AJ Date: Sep 2021 Isothermal calorimetry is a useful technique for studying the cement hydration process that measures the heat flow of cement paste during hydration. Standard cement properties, such as compressive strength, setting times and compatibility can ... Read more
Laboratory evaluation of alternative cost effective pavement materials

Author: Smit, Michelle A ; Akhalwaya, Imraan ; Rust, FC Date: Jul 2021 The South African road network is severely impacted by the high costs associated with upgrading, maintaining and constructing road infrastructure in conjunction with the shortage of good quality construction materials. The Council for Scientific ... Read more
Laboratory performance and modelling behaviour of hot-mix asphalt with recycled crushed glass

Author: George, Theresa B ; Anochie-Boateng, Joseph ; Jenkins, KJ Date: Sep 2020 In South Africa research is currently under way to determine the suitability of using locally available recycled crushed glass as a partial fine aggregate substitute in the production of asphalt mixes. This paper characterises the laboratory ... Read more
Microbial Induced Calcium Carbonate Precipitation (MICCP) for road construction

Author: Smit, Michelle A ; Akhalwaya, Imraan ; Rust, FC ; Ramdas, Veshara Date: Jul 2022 The growing concern over climate change has led the drive for the development of alternative building materials in several industries, including road construction. Bio-based construction, using Microbial Induced Calcium Carbonate Precipitation ... Read more
Performance evaluation of bio-based fractions derived from Bacillus spp. for potential in situ soil stabilisation

Author: Ramdas, Veshara ; Lalloo, Rajesh ; Mandree, Prisha ; Mgangira, Martin B ; Mukaratirwa, Samson ; Ramchuran, Santosh O Date: Feb 2022 Current and future research focuses on the use of renewable technologies and materials to stabilise weak soils, of varying degrees, for road construction applications. Soil stabilisation is a method of strengthening a natural soil to meet ... Read more
Quantifying the environmental impacts of a sustainable concrete mix for a block paving system

Author: Dumani, Nozonke ; Mokoena, Refiloe ; Mgangira, Martin Date: Jan 2024 A sustainable concrete mix design, incorporating industrial by-products: fly ash and recycled plastic pellets, was developed, and optimized through laboratory performance-based testing trials. The primary objective of this investigation was ... Read more
Review of current and future bio-based stabilisation products (enzymatic and polymeric) for road construction materials (article)

Author: Ramdas, Veshara M ; Mandree, Prisha ; Mgangira, Martin B ; Mukaratirwa, S ; Lalloo, Rajesh ; Ramchuran, Santosh O Date: Mar 2021 In situ soil modification is required in order to improve the primary engineering properties of the material to meet a road construction standard. Bio-stabilised soil is an environmentally friendly, cost-effective alternative to imported ... Read more
South African infrastructure condition - an opinion survey for the SAICE Infrastructure Report Card

Author: Rust, FC ; Wall, K ; Smit, Michelle A ; Amod, S Date: Jun 2021 The South African Institution of Civil Engineering (SAICE) Infrastructure Report Cards of 2006, 2011 and 2017 reported that much of the South African infrastructure is in a poor condition. To augment the recent 2017 Report Card, a survey was, ... Read more c b n d
Sustainable pavement construction: Use of non-potable water and smart techniques for compaction

Author: Rampersad, Ashiel ; Mvelase, Gculisile M Date: Dec 2021 The western cape government reported an annual mean near-surface (2m) temperature (°C) change from the median and the 10% and 90% percentiles projected for 2036 – 2065 and 2066 – 2095. Across most of the country, model-simulated rainfall is ... Read more
Understanding the mechanism of interaction of candidate soil stabilizing prototypes by using microscopy and spectroscopy techniques

Author: Ramdas, Veshara M ; Lalloo, Rajesh ; Lekha, Prabashni S ; Mgangira, Martin B ; Muniyasamy, Sudhakar ; Mukaratirwa, S ; Ramchuran, Santosh O Date: May 2021 Globally, there is a high demand for bio-based soil stabilizers required for improving the strength properties of weak in situ soil. Microbes and microbial components such as Bacillus spp. have gained interest as soil stabilizers due to their ... Read more

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