YCRETS 2021

PROCEEDINGS

SYMPOSIUM THEMES

New generation of construction materials

Cement-based materials, alternative binders, waste materials, environmentally-adaptable materials, green composites, intelligent materials, self-healing and self-sensing materials.


Durability, monitoring & repair of RC structures

Durability aspects of construction material in a variety of structures and harsh environments, maintenance and management of civil infrastructure and sustainable repair, rehabilitation and retrofitting.


Challenges in the design and management of structures

The design of new and assessment of existing structures based on lessons learned from practice, from collapses, from successes, aiming optimization of structural life cycle management decisions.


Sustainability

Specifications and standards for concrete, optimising materials for improved durability. Current and future research needs.


Structural analysis

Analysis of various structural elements or structures that consist of or incorporate concrete.

VIDEOS

Day 1, 13 July 2021

Opening Session

Welcome Address, Bryan Perrie – Chief Executive Officer of Cement & Concrete SA
Invited Speaker, Emeritus Professor Mark Alexander – University of Cape Town

Session 1
  • Investigating the use of isothermal calorimetry for predicting physical properties of cements Refiloe Mokoena – Council for Scientific and Industrial Research
  • Potential for carbon dioxide sequestration in wet concrete mixes, Ivy Milanova – University of Pretoria
  • Management of concrete and cementitious Waste: An assessment of practices and strategies in South Africa, Frieda Mogodi – University of the Witwatersrand
Session 2
  • Characterization of mahogany bark ash for its use as supplementary cementitious material and its behavious in a cement paste at its earlier age, Inès Ngassam – Bundesanstalt für Materialforschung und -prüfung
  • Engineering performance of concrete with paper mill waste ash – towards sustainable rigid pavement construction, Deveshan Pillay – University of KwaZulu-Natal
  • Characterization of ternary blended self compacting concrete exposed to sulphate environment, Deep Tripathi – Motilal Nehru National Institute of Technology
Session 3
  • The viability of rubberised concrete in the South African construction industry, Matthew Jonck – University of the Witwatersrand
  • Stress-strain characteristic of crumb-rubber masonry concrete prism column under compression, Sanni Mukaila – Ahmadu Bello University
  • Effect of recycled crushed concrete fines on density, slump, strength and accelerated shrinkage of concrete, Philemon Arito – University of Namibia
Session 4 & 5
  • Sustainable treatment methods for recycled concrete aggregate, Priyadharshini Perumal – University of Oulu
  • Strength, durability and microstructure of concrete made using waste electrical and electronic plastic as partial replacement for the natural aggregate in concrete, Lewis Parsons – University of the Witwatersrand
  • Capillary pressure measurement of crumb-rubber masonry concrete block, Sanni Mukaila – Ahmadu Bello University
  • SAICE & RILEM Presentations

Day 2, 14 July 2021

Opening Session

Welcome Address, Hanlie Turner – Business Development Manager of Cement & Concrete SA
Invited Speaker, Professor Yunus Ballim – University of the Witwatersrand

Session 1
  • Framework for assessing the viability of laterite as a source of aluminosilicates in
    geopolymerisation, Victor Gilayeneh – University of the Witwatersrand
  • Performance of geopolymer concrete subjected to HCL in static and dynamic test conditions, Mandla Dlamini – Council for Scientific and Industrial Research
  • Influence of blended cements on corrosion rate of steel in reinforced concrete structures in a marine tidal zone – A review, Luthando Ngcotwana – Central University of Technology
Session 2
  • The influence of steel fibre reinforcement on the ballistic resistance of concrete, Jurie Adendorff – University of Pretoria
  • Experimental study on the effect of flexural reinforcement ratio on punching shear strength of flat slab without shear reinforcement, Abdelrhman Ahmed – University of Khartoum
  • A review of material specification for 3D printing technologies and alkali-activated materials contribution, Ndapandula Kawalu – University of Johannesburg
Session 3
  • Young Researcher Award
Session 4
  • The susceptibility of selected Namibian aggregates to ASR, Philemon Arito – University of Namibia
  • Combined action of chloride-induced steel corrosion and ASR in RC structures – a review and ongoing study, Williams Dunu – University of the Witwatersrand
  • Corrosion prediction models for biogenic acid attack concrete in sewers, Alice Bakera – University of Cape Town
Session 5
  • Effect of corrosion of lap-spliced steel reinforcement on the flexural strength of reinforced concrete beams, Anele Mahlawe – University of the Witwatersrand
  • Corrosion of reinforcing steel induced by combined penetration of chlorides and carbon dioxide in concrete with construction cold joints, James Teggin – University of the Witwatersrand
  • Ultimate tensile strength of corroded steel reinforcement bars in cracked concrete exposed to 1D and 2D chloride ingress, Ze Zakka – University of the Witwatersrand
  • Closing remarks

Winner of Young Researcher Award

Dr. Benedict Olalusi

KZN STRUCTURAL ENGINEER WINS CCSA ‘YOUNG CONCRETE RESEARCHER’ AWARD

Cement & Concrete SA (CCSA) has named Dr Benedict Olalusi, lecturer at the University of KZN’s School of Civil and Environmental Engineering, as South Africa’s top Young Concrete Researcher for 2021.

The new award, made at CCSA’s recent Young Concrete Researchers, Engineers and Technologists’ YCRETS 2021 online symposium, recognises young researchers who are making a significant contribution to advancing concrete technology through research excellence at an early stage in their careers.

Dr Olalusi, 31, is a structural engineer who holds a PhD Degree in Civil Engineering from Stellenbosch University, based on his research in the field of Structural Reliability and Risk Assessment. He obtained his M.Eng degree in Structural Engineering and B.Eng degree in Civil Engineering from the Federal University of Technology Akure, Nigeria, and also spent time as international scholar at the Technical University (TU) of Dortmund  in Germany on the institution’s 2019 Gambrinus Fellowship for global cooperation in teaching and research.

The CCSA Young Concrete Researcher for 2021’s research work is focused on structural reliability and risk analysis, shear in concrete beams, probabilistic safety evaluation of existing design standards, and innovative construction materials and application of machine learning and data mining in structural engineering. Dr Olalusi has already won several awards for his research projects from various institutions and has received several research grants from the SA National Research Foundation (NRF) and international bodies.

With years of industry experience in sectors ranging from civil/structural engineering, risk consulting and structural software development, he has authored and co-authored articles in peer-reviewed conference proceedings and reputable journals and has been a supervisor for many postgraduate students.

In accepting the CCSA award, Dr Olalusi said he was highly honoured to win such an important accolade which would inspire him to greater heights in his research work. “I have received inspiration from my seniors and my colleagues, for whom I have the most profound respect, and from whom I have derived the strength to challenge myself to perform better at each stage,” he stated.

Prof Mike Otieno, of the School of Civil and Environmental Engineering at the University of the Witwatersrand, who chaired the CCSA Young Concrete Researcher adjudication panel, said CCSA decided to introduce the award, scheduled to be part of future YCRETS symposia, to recognise and appreciate the contributions of young researchers for:

  • The advancement of knowledge in the field of concrete;
  • Their engagement in activities of industry bodies; and
  • Their promotion of a “culture of excellence” among young researchers.

“CCSA wanted to encourage both established and young researchers to mentor and introduce novice researchers into the concrete community,” Prof Otieno stated.