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29 November 2022 | Story Leonie Bolleurs | Photo Leonie Bolleurs
UFS green concrete
The Department of Engineering Sciences (EnSci) welcomes collaborations with other departments at the UFS. Pictured here are, from the left: Louis Lagrange, Head of EnSci, Prof Kahilu Kajimo-Shakantu, Head of the Department of Quantity Surveying and Construction Management, Dr Abdolhossein Naghizadeh, and Megan Welman-Purchase, analytical scientist in the Department of Geology.

More than 30 million tonnes of fly ash (residue from coal combustion in power plants) are generated in South Africa annually, with 96% of that being disposed of in landfills. There is thus more than enough of this key ingredient to produce green concrete. 

Green concrete, so called due to its environmentally friendly benefits, is an eco-friendly alternative to conventional concrete based on the Portland cement binder. During the production of green concrete, less carbon dioxide is released into the atmosphere than with the production of ordinary Portland cement (OPC). The latter accounts for up to 8% of all global carbon emissions.

Successful tests

In the Green Concrete Lab, established in 2021 within the Department of Engineering Sciences (EnSci) on the Bloemfontein Campus of the University of the Free State (UFS), Dr Abdolhossein Naghizadeh, Senior Lecturer, researcher, and engineer, is working on green cement and concrete projects.

He uses ‘geopolymer’ technology and a mix of waste materials, alkaline solutions, and recycled aggregates to form concrete mixtures that can provide properties similar to conventional concrete.

Besides being a synthesised inorganic material (not a petrochemical product), the geopolymer cement he introduced has the following properties: it is made from a reaction between aluminosilicate materials and strong alkalis (5-7% of the concrete mixture), it uses water and by-products as raw materials, it does not calcinate lime, thus giving it a low carbon emission, and it is also beneficial from a waste management point of view. 

The waste materials used can include waste from industrial and agricultural sources, such as fly ash, rice husk ash, sugar-cane bagasse, or corncob ash, as well as natural materials such as volcanic ash. In South Africa, sufficient amounts of industrial and agricultural waste are available. 

“So far, we have successfully tested various types of green concrete based on different waste materials,” says Dr Naghizadeh. 

Besides researching the green mixture proportions in the lab, Dr Naghizadeh and his students focused their attention on establishing the strength, durability, workability, and production cost of the product. 

They compared green concrete with conventional concrete. Green concrete’s workability is slightly lower (but he believes that with appropriate mix design it can be corrected), and it has a much higher compressive strength (50-90 MPa), a smaller carbon footprint, and comparable production costs to conventional concrete (depending on the mix design). A very high level of resistance against alkali-silica reaction (concrete cancer) is also present, as well as resistance to carbonation, sulphate attack, and acid attack.
So far, we have successfully tested various types of green concrete based on different waste materials.– Dr Naghizadeh. 

He explains, “The superior durability performance of green concrete is related to its chemical compositions and microstructure. For example, the lack of calcium content in the composition provides better resistance to alkali-silica reaction. At the same time, stronger bonds between elements and polymeric microstructure provide better resistance against acids and fire.”

With all the work and research of the past year and a half, Dr Naghizadeh says they are at the stage where they can prescribe green concrete production recipes for the industry parties based on the specified application and the materials they have.

Biggest accomplishments

“We transferred most of the experimental works to the Green Concrete Lab at the beginning of 2022, which improved our productivity tremendously. Since then, nine journal papers and three peer-reviewed conference papers have been published as outputs of the research projects. Currently, there are also multiple publications under review or in the development stages,” says Dr Naghizadeh.

In addition to him, there are three master's students and one research associate working on their own individual projects.

The department is very proud of its research outputs. Dr Naghizadeh was either author or co-author of all 12 research papers. The focus of these papers was mostly on the formulation of green concrete, based on locally available agricultural waste materials, the formulation of one-part geopolymer cement (when aluminosilicate raw material is replaced with pre-activated aluminosilicate material, water can be used instead of alkali solution), and the development of ambient-cured green concrete (replacing the aluminosilicate raw material with a blend of materials).

Dr Naghizadeh is also the project leader of a group of scientists from local and international universities who are researching sustainable construction materials. These institutions include the Universities of Johannesburg, KwaZulu-Natal, Yaoundé in Cameroon, Erzurum Technical University in Turkey, as well as Nelson Mandela University and the Central University of Technology, which recently came on board. 

 


 


News Archive

Financial and registration information for UFS students (including international students)
2017-02-22


Update: 7 February 2017


The management of the University of the Free State (UFS)
is aware of a misleading post on social media this
past weekend.

The correct facts are:

1) In December 2016, the UFS received information of a
total allocation of R189 239 000 from the National Student
Financial Aid Scheme (NSFAS) for 2017.

2) NSFAS provisionally funded 453 first-time entering
students in January 2017.

3) During 2016, 3 868 students received NSFAS funding.
Should these students qualify according to the academic
requirements of NSFAS, they will qualify to receive the
same funding again in 2017. In the meantime, due to the
current backlog at NSFAS, the UFS assisted 2 573 of
these students who qualify for funding academically.
This will enable the students to register for 2017 while
waiting for NSFAS to make the necessary allocations.
Information as on 6 February 2017 indicated that 2 330
of these students already made use of the opportunity
and have registered for 2017.

4) On 6 February 2017, the UFS received communication
from NSFAS regarding an additional amount of
R66 513 252 which is available for first-time
entering students. Approximately 875 students
will benefit from this allocation. Financial Aid will soon
finalise this process and successful students will be
notified of the allocations.

5) The UFS is in the process of resolving the
classification of the quintile schools so that more
students could be assisted.

The above-mentioned is not final and will change
on a daily basis.

There is an understandable and shared concern among students of the University of the Free State (UFS) around the cost of higher education. This has been a topic of discussion not only on national level, but it has also been a priority for the university’s senior leadership in discussions with student leaders.

The following are ways in which students receive assistance to register for the 2017 academic year:

1.    Students receiving assistance from the National Student Financial Aid Scheme (NSFAS)

1.1    Senior students

1.    Senior students who received NSFAS assistance in 2016.

a.    This group of students will receive a NSFAS allocation in 2017, subject to the following terms and conditions:
i.    If they satisfied the 50% module pass requirement for the 2016 academic year.
ii.    If they satisfied the n+2 completion requirement.

b.    Students who conform to these requirements can register as from 31 January 2017.
c.    These students’ placement in residences can also be confirmed.
d.    These students will receive an allocation for books and meals subject to the prioritisation as prescribed by NSFAS.

2.    Senior students who received confirmation of a NSFAS allocation in 2017 with outstanding debt of not more than R20 000.

a.    These students must please visit the Student Finance desk in the different registration venues to make acceptable arrangements for payment of the outstanding monies.
b.    Acceptable arrangements refer to the payment of 50% of these outstanding monies by 30 June 2017 and the remainder by 31 October 2017.
c.    These students will be allowed to continue with their registration after the above process has been complied with.
d.    These students’ placement in residences can also be confirmed.
e.    These students will receive an allocation for books and meals subject to the prioritisation as prescribed by NSFAS.

3.    Senior students who applied for NSFAS assistance in 2017 for the first time or applied previously, but did not meet the qualifying criteria, may only register with the assistance of a NSFAS allocation once confirmed by NSFAS. In the absence thereof, these students may only register after payment of the required prepayments for full registration, or they may register provisionally.

1.2     First-time entering students
The university’s Department of Finance is dealing with this group collectively based on the confirmed financial assistance by NSFAS for the group as a whole.

1.    First-time entering students to whom an allocation have been confirmed by NSFAS will receive an allocation and will be able to continue with their registration. Their placement in residences can also be confirmed. They will receive an allocation for books and meals subject to the prioritisation as prescribed by NSFAS.

2.    First-time entering students who applied at NSFAS before the cut-off dates and matriculated at schools in the quintile 1 to 3 categories will be allowed to register on providing proof of submission of their application. Their placement in residences can also be confirmed. They will receive an allocation for books and meals subject to the prioritisation as prescribed by NSFAS. Confirmation of the students who matriculated at schools in the quintiles 1 to 3 (as per the data collected with the assistance of the university’s ICT Services) will serve as sufficient evidence of the NSFAS allocation still to be made to them.

3.    First-time entering students who can provide proof that the family income is dependent on a grant from the South African Social Security Agency (SASSA)  has also been confirmed to receive a NSFAS allocation.  Their placement in residences can also be confirmed. They will receive an allocation for books and meals subject to the prioritisation as prescribed by NSFAS.

4.    Please note that the above process only caters for applicants who applied in time and who are admitted in programmes for 2017.

1.3 NSFAS prescriptions towards the allocation of funds

NSFAS determined a priority order that must be used to distribute the NSFAS allocation. The priority order is as follows:

1.    Tuition fees
2.    Books
3.    Accommodation
4.    Meals
5.    Travel

The amount awarded must be allocated according to the above priority order until it is depleted. It thus means that all tuition fees must first be paid before an allocation may be made for books, accommodation, meals, and travel.

NSFAS also prescribes that no allowance may be paid until the student has signed his or her contract. Due to the backlog with allocations to students by NSFAS, contracts for these allocations are also not made available yet.

The UFS is fully aware of the predicament the above circumstances create for students with regard to the allocations for books and meals. To assist students as a transitional arrangement, the university took it upon itself to advance an amount of R750 for meals to all registered NSFAS recipients. This advancement will be paid by the students’ NSFAS allocation after they have signed the contract. All other payments, as per the priority order, can unfortunately only be made after students signed the NSFAS contracts. Signing of contracts will be done electronically.  

The advance for meals has been available since Monday 6 February 2017. Students  are reminded that they must be registered before the amount of R750 may be advanced. Students should visit the Financial Aid Offices for enquiries.

Students are requested to support the effort of the UFS by availing themselves to sign contracts as soon as it becomes available.

Students should also note that all universities were informed this week of the backlogs that has developed at NSFAS in the processing of financial aid applications made by first-time entering students and returning students. NSFAS is giving urgent attention to the matter. The UFS is monitoring the progress closely and will communicate with the affected students, if necessary.

2.    Senior students with outstanding debt who do not receive NSFAS funding

Students may register provisionally, subject to the following terms and conditions approved by the UFS Council on 2 December 2016.

1.    Students must be South African citizens. (International students may not register provisionally because of the Immigration Act.)
2.    Students must have been previously registered at the UFS.
3.    Students must be enrolled for full-time studies and must attend lectures on one of the three campuses (open-learning students, e-learning students, and students registered with Varsity College do not qualify for provisional registration).  
4.    Outstanding balances on an applicant’s tuition fees account for 2016 must be less than R20 000.

The minimum pre-payment to register provisionally in 2017 is:
R1 900 for non-residential students; and
R6 750 for residential students.

3.    Department of Higher Education Fees Adjustment Grant for 2017

The Department of Higher Education and Training will pay the fee increase capped at 8% for all qualifying registered students with a gross combined family income of up to R600 000 per annum in 2017. This is a grant and will not have to be repaid by qualifying students. The grant will only cover tuition fees and accommodation provided by universities. Students who are recipients of bursaries and scholarships that cover their full cost of study will have to pay the percentage fee adjustment.

The following students qualify:

1.    Only South African citizens and citizens with permanent South African residence studying towards an undergraduate or postgraduate qualification in 2017.
2.    The applicant and direct family (mother, father, spouse or legal guardians) must have a GROSS combined family income of R600 000 or less per annum before tax deductions.

The following students will not have to apply for the grant as they will automatically be considered:

1.    Applicants who applied for NSFAS funding.
2.    All students who attended quintile 1, 2, and 3 schools in Grade 12.

All other students will have to apply for the fee adjustment grant. The application form is available on www.ufs.ac.za. Incomplete applications will not be considered. More information can be obtained from the Financial Aid Office.

Students who are unsuccessful in their application may appeal within 14 days of the outcome of the decision by completing an appeal form which will also be available on the university's website at http://www.ufs.ac.za/kovsielife/unlisted-pages/bursaries/financial-aid.

The closing date for applications is 15 February 2017.

4.    International students

The prepayments for 2017 as approved by the UFS Council on 2 December 2016 are:
1.    Non-resident students: R28 160
2.    Resident students: R43 160

The following concessions were made to assist international students to meet the financial requirements for 2017 as approved by the UFS Council on 2 December 2016:

1.    Students who are unable to pay the full amount must visit Student Finance in registration venues.
2.    All outstanding monies of the previous year must be paid in full.

3.    The prepayment amount for 2017 will be calculated for each student based on the following:
a.    A minimum payment of R12 820 for non-resident students and R22 725 for resident students is payable before registration can be considered.
b.    A quotation will be prepared based on the academic advice for 2017.
c.    A payment agreement for the balance of the pre-payment or the first semester’s fees is signed by the student.
d.    This amount is payable not later than 31 March 2017.
e.    The registration of these students are subject to the on-time payment of the agreed amounts.    
The current position of the Department of Home Affairs is that all students who have pending applications should be allowed to register on condition that they produce their study visas by 31 March 2017 (Refer to the Minister’s Dispensation Immigration Directive 26 of 2016).

International students may apply for an emergency travel document at their respective Embassies/Consulates, as this will allow for cross-border travelling and will give the student an opportunity to register on site.

Students should bring or email a copy of their receipts as proof that they have applied for their study visa and a certified copy of their passport (issued by the South African Embassy or Consulate), confirmation of their medical aid (a SA medical aid registered under the SA Medical Schemes Act 131 of 1998). Students will have up until 31 March to submit their study visas to Mrs Niemann at the Office for International Affairs, located in the Mabaleng A Building on the Bloemfontein Campus; email: niemannaja@ufs.ac.za. Failure of which will result in deregistration of students.

Zimbabwe: Because Zimbabwe no longer issues emergency travel documents,  students from Zimbabwe must email a certified copy of their passport and receipt (issued by the South African Embassy or Consulate), and confirmation letter of the medical aid to Ms Jeanne Niemann from the Office for International Affairs on the following email address: niemannaja@ufs.ac.za. In doing so, students will be able to register online provided that their finances and their admission requirements are in order.

International students should note that the blanket concession was only for final-year students that could not complete their studies due to exams being written at the beginning of the next academic year.  If a student returned home in December 2016, this concession expired and the student had to re-apply for a study visa or apply for a visitor’s visa. The relaxed requirements will apply only to final-year students who were not meant to return and continue studies in 2017.

Please see the following explanation of the Blanket Concession:

CLARIFICATION – BLANKET STUDY VISA EXTENSION TO 31 MARCH 2017

Circular 31 of 2016 has reference.

The International Education Association of South Africa (IEASA) has brought to our attention that there may be some confusion regarding the blanket administrative extension to 31 March 2017 of study visas with an expiry date of or prior to 31 December 2016 granted by the Department of Home Affairs in Immigration Directive No. 25 of 2016.

The Department of Home Affairs has confirmed that the Directive does not serve as a replacement visa for students travelling home in December 2016. This Directive serves as an extension of current visas for students who need to complete their academic programmes in 2017. The DHA has advised that should any final-year students be travelling to their home countries in December 2016, they would need to return in January 2017 with a visitor’s visa.

5.    Enquiries

Bloemfontein and South Campuses:

Undergraduate and honours students: +27 51 401 3003 / 2806 / 9090 / 9670 / 2817 / 9669

Postgraduate students (Master’s and Doctoral): +27 51 401 9537

Refunds: +27 51 401 7050

Student cards (meals and books): +27 51 401 2799 / 3337

Collections: +27 51 401 3643 / 3448; Fax: +27 51 401 3579

Email: tuitionfees@ufs.ac.za  

Qwaqwa Campus:

Client Services: +27 58 718 5024 / 5119 / 5262

Student cards (meals and books): +27 58 718 5026

Cashiers: 058 718 5028; Fax: +27 58 718 5118

Email: nchapiem@qwa.ufs.ac.za

International Office:  

+27 51 401 3219

 

Released by:
Lacea Loader (Director: Communication and Brand Management)
Telephone: +27 51 401 2584 | +27 83 645 2454
Email: news@ufs.ac.za | loaderl@ufs.ac.za
Fax: +27 51 444 6393















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