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23 June 2021 | Story Leonie Bolleurs | Photo Supplied
The Department of Engineering Sciences (EnSci) – under the leadership of Dr Abdolhossein Naghizadeh – is heading a collaboration of scientists to create a green concrete that will reduce the impact of cement on the environment.

Conventional cement production is responsible for more than 6% of the overall carbon emissions in the world, which ultimately affects global warming.

The Department of Engineering Sciences (EnSci) at the University of the Free State (UFS) – under the leadership of Dr Abdolhossein Naghizadeh – is heading a collaboration of scientists from universities in South Africa and abroad to create a green concrete that will reduce the impact of cement on the environment.

This product has the potential to be used as an alternative to conventional concrete in large-scale constructions such as residential buildings and infrastructure, as well as small-scale constructions such a pavements and brickworks. 

Dr Nagizadeh, whose passion is cement and green concrete, says the idea of eco-friendly concrete was considered by European researchers a few years ago; however, this technology is still in its initial stages and has not been researched and employed at industrial scale yet. He believes that it is due to the complexity of the preparation process, and the relatively aggressive chemicals used in green concrete mixtures.

Expertise and equipment 

With his knowledge and experience of the product, Dr Naghizadeh – who joined EnSci in 2020 – has been appointed project leader of a collaborative group of scientists from the Universities of Johannesburg, KwaZulu-Natal, Yaoundé in Cameroon, and the Erzurum Technical University in Turkey.  

“Since there are only a limited number of researchers in this field, EnSci is benefiting from the expertise of this international collaboration. The proficiency of this group of scientists are keeping the project current, based on the latest findings in the research area,” says Louis Lagrange, Head of the Department of Engineering Sciences. 

Based on this new capacity, the department decided to establish and equip a new laboratory facility dedicated to cement and concrete research, with a specific current focus on green concrete. 

In this laboratory, they want to create formulations of green concrete, based on user-friendly materials. Furthermore, they aim to simplify the preparation and mixing process. “This can introduce a more eco-friendly, desirable product that can easily be employed extensively in the construction industry,” says Lagrange.

Benefits and other advantages

Besides its ability to reduce the impact on the environment through reduced carbon emissions, the product is also described to perform at equal or even superior strength and durability compared to conventional concrete, with potentially substantial environmental and economic benefits. 

This product is also primarily made from waste materials or industrial by-products. Dr Naghizadeh explains it as follows: “Normal concrete consists of conventional (Portland) cement, sand, stone and water, while in green concrete the conventional cement part of the concrete mix is replaced by industrial wastes or by-products and alkali solutions. These alternative materials are mostly aluminosilicate materials such as fly ash (residue from coal burning process in power plants) and slag (waste material from iron extraction processes).”

“Using these waste substances as binding material in green concrete can, apart from the environmental benefits, also reduce waste and contribute to the circular economy. Annually, more than 36 million tons of fly ash are produced in South Africa alone, of which more than 90% is deposited at landfill sites. Reuse of these waste materials will moderate the related waste deposition issues, such as air and groundwater pollution.”

Production of green concrete

Currently, green concrete is mostly produced in two parts: a solid raw material and an alkali activation solution. With their project, the research group wants to develop green concrete in a powdered form, to be mixed with water, instead of a chemical. Dr Nagizadeh estimates that the construction industry will be able to benefit from their work in about two years’ time when they will have a user-friendly green concrete product ready. 

Apart from putting an eco-friendlier concrete on the market, this project is also establishing a brand-new research niche in the UFS Department of Engineering Sciences. According to Lagrange, this research has the ability to attract postgraduate students and other researchers. He is also looking forward to the international academic recognition that EnSci will receive through published articles in leading international journals, and the participation of researchers in accredited conferences arising from this project. 

Lagrange is pleased that the project is establishing EnSci as a research player of note in the engineering field, specifically in the green engineering field. 

News Archive

Important message to UFS students on NSFAS and financial aid in general
2013-02-01

31 January 2013

Dear Students

There remains some uncertainty as well as misinformation within the student body concerning NSFAS and financial aid in general. This communication is intended to provide the facts on the state of student funding at the University of the Free State (UFS). I hope you find this information helpful and that it would guide you in your decisions as you wait to hear from, or hopefully receive funding from NSFAS or any other source.

  1. Every year the Department of Higher Education and Training (DHET) determines how much funding is available to fund students at all universities in South Africa; this is determined in part by the student numbers. Universities do not ask for, or determine the DHET allocation and are instructed by government that “NSFAS will ensure that the universities comply with the processes, procedures…for the allocated funds.”

  2. On 14 December 2012 the UFS received notice from the DHET that our total allocation would be R108,331,215.66 and that this amount must be apportioned in the following categories:
    General NSFAS Funding R85,174,275.07
    Teacher Training R2,291,940.59
    Disability Funding R1,265,000.00
    Final-Year Programme R19,600,000.00

  3. The UFS received 5 952 applications for NSFAS funding and with the available funding we can only finance up to 3 000 students on the Qwaqwa and Bloemfontein Campuses, provided that those students satisfy the stringent criteria, e.g. the so-called “national means test” determined for all universities in the country. If we funded more students that the available monies allow, the university would be held accountable by the NSFAS Board and the DHET and this would threaten future funding.

  4. Students apply in the previous year and therefore late applications are less likely to receive funding.

  5. Academic merit also counts, therefore students who fail one or more modules are less likely to receive new or ongoing support from NSFAS. The combination of academic standing and financial need are among the important criteria in decision-making on NSFAS funds.

  6. The UFS is one of the few universities with a very efficient record in using every cent made available to support poor students; we are proud of this record. No money is sent back to NSFAS, except small amounts not claimed by students in the disability category. The university is not allowed to shift funds between categories as described in point #2 above.

  7. Allocations are not based on campus, but need.

  8. The UFS sets aside an additional R35,7 million (in 2013) from within its own budget as bursaries so that we can accommodate as many students as possible. We spend every cent of this funding on students.

  9. The UFS also raises millions in bursaries from the private sector to support poor and promising students, though these funds are often linked to the industry granting the money, e.g. Investec for Accounting students and SASOL for Chemistry students. This recruitment of bursaries is a 24/7 commitment of the Marketing Office and the Faculties and Heads of Departments are also active in raising funds from government agencies, parastatals and the private sector for students in their units.

  10. After almost all our 2013 funds were allocated in favour of students, we calculated a shortfall in the NSFAS allocation of approximately R51 million. We are in the process of making an urgent submission to NSFAS to consider this additional allocation, but we cannot guarantee that this plea can or will be met.

Finally, I want all our students to know that the University of the Free State works very hard to raise every cent we can to provide poor students with funding for their studies. Many of my colleagues, including support staff, who do not earn very much, use some of their meagre personal resources to help a student with money for registration or clothing or food. In fact, the No Student Hungry Campaign that raises more than R600,000 by UFS volunteers annually, is another mechanism for trying to assist students who might have money for studies, but not much else.

We do this because we care, and because this is what The Human Project at Kovsies is all about.

I therefore ask for your patience as we continue our labour of raising the funds that enable every deserving student to continue their studies at the University of the Free State.

Should you have any further questions about NSFAS, please leave an email inquiry on choanet@ufs.ac.za or mallettca@ufs.ac.za and we will endeavour to provide you with the information you require.

Sincerely Yours

Jonathan D Jansen
Vice-Chancellor and Rector
University of the Free State

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