Latest News Archive

Please select Category, Year, and then Month to display items
Previous Archive
12 July 2019 | Story Leonie Bolleurs
Unique building project
Students from the Department of Architecture and their lecturer, Hein Raubenheimer, building a new future for colleague Adana and her family. In 2018 the builders decided to use a combination of clay bricks and earth bricks as major construction material.

When a colleague in the Department of Architecture bought a plot of land in 2014, her joy knew no bounds and she could not wait to share the news with fellow colleague, Hein Raubenheimer.

Raubenheimer, a lecturer in the department, could not help but think that Adana (pseudonym) would, “like many others, promptly erect a ‘dwelling’ of affordable second-hand material”. This made him muse on how he could help in erecting a more ‘permanent’ house for her, her son and daughter.

He related: “The first-year hut-building project was in the making, and my involvement with it made me think about the possibilities of reusing the earth bricks that were formed during the building process for a potential earth-brick dwelling. However, the quality of such bricks could not be guaranteed and a more controlled manner of forming earth bricks had to be investigated.”

Interdisciplinary research
After talking to an architect friend, JT Erasmus, about the possibility of sustainable forms of building an informal dwelling, Raubenheimer was brought into contact with a colleague in the Department of Chemistry, Dr Elizabeth Erasmus. Together, he and Dr Erasmus formulated and submitted an application for interdisciplinary research. Their application was to investigate the testing of polymer-stabilised earth bricks. “To our surprise, our application was successful. The funds prompted us to immediately start preparing the site and purchasing the necessary equipment for making stabilised earth bricks,” said Raubenheimer.

He elaborated: “During the first two years, all the first- to third-year students were involved in the earthworks, foundations, and making of earth bricks. Since 2018, Prof Gerhard Bosman, Associate Professor in the Department of Architecture, became involved with the fourth-year students, focusing on the finishing touches of the building project as well as the service components.”

Economically viable
For the project to be economically viable, the layout of the floor plan was as compact as possible (35 m²). Raubenheimer explained: “Three areas (living, sleeping, washing) were arranged to create some privacy with the minimum structure. The sleeping area was a double volume with a proposed mezzanine floor that could function as a ‘loft’ (second sleeping area).”

According to Raubenheimer, they wanted to build the entire house with stabilised earth bricks, but due to the labour-intensive and time-consuming process of making the bricks, they decided in 2018 to use a combination of clay bricks and earth bricks as major construction material.

Bloemfontein opens its heart

Apart from the approximately 200 Architecture students and lecturers involved in the project, the community of Bloemfontein also opened their hearts and hands widely.

“We were very lucky to get the roof sheets as donation – surplus as a result of the colour difference (Safintra Roofing), a lightweight-steel construction company (Siteform) sponsored the roof structure, UFS Facilities Management donated all the windows (from their scrapyard), and a well-known Bloemfontein construction company (Sebedisan Construction) delivered lots of recycled material with a three-ton truck. There were also several private cash donations from alumni of the Department of Architecture. Local artisans, Diphapang Machabe, April Milela, Kabelo Lando, and Petrus Letsoara also assisted with the project.

With the use of recycled material and earth bricks, the CO2 footprint of the building was minimal. Raubenheimer explained that the small areas with good North orientation, together with the good insulating properties of the earth bricks, is making the interior very comfortable throughout the year. “Good insulation of the roof and ‘loft’ will minimise the need for heating and cooling,” he said.

Hope for the future
If everything runs smoothly, the project will be completed in the spring of 2019. “And then we will have a proper house-warming. Up until now, each phase of the project was an adventure for Adana. In the beginning, she could not believe that anything would come of it; but her appreciation, despite the prolonged construction period, has grown,” said Raubenheimer.

On a personal level, this project also meant a lot to Raubenheimer. “The limited finances and possibility of applied low technology, experimental forms of detailing all contributed to the adventure. The greatest learning curve for me, however, was to experience the ‘neighbourhood’. The most wonderful respect for life on the faces of neighbours and passers-by. The fact that people here seem to have nothing, but then the perception that as a community they have so much caring, time, and love for each other, has given me hope.”

News Archive

UFS physicists publish in prestigious Nature journal
2017-10-16

Description: Boyden Observatory gravitational wave event Tags: Boyden Observatory, gravitational wave event, Dr Brian van Soelen, Hélène Szegedi, multi-wavelength astronomy 
Hélène Szegedi and Dr Brian van Soelen are scientists in the
Department of Physics at the University of the Free State.

Photo: Charl Devenish

In August 2017, the Boyden Observatory in Bloemfontein played a major role in obtaining optical observations of one of the biggest discoveries ever made in astrophysics: the detection of an electromagnetic counterpart to a gravitational wave event.
 
An article reporting on this discovery will appear in the prestigious science journal, Nature, in October 2017. Co-authors of the article, Dr Brian van Soelen and Hélène Szegedi, are from the Department of Physics at the University of the Free State (UFS). Both Dr Van Soelen and Szegedi are researching multi-wavelength astronomy.
 
Discovery is the beginning of a new epoch in astronomy
 
Dr van Soelen said: “These observations and this discovery are the beginning of a new epoch in astronomy. We are now able to not only undertake multi-wavelength observations over the whole electromagnetic spectrum (radio up to gamma-rays) but have now been able to observe the same source in both electromagnetic and gravitational waves.”
 
Until recently it was only possible to observe the universe using light obtained from astronomical sources. This all changed in February 2016 when LIGO (Laser Interferometer Gravitational-Wave Observatory) stated that for the first time they had detected gravitational waves on 14 September 2015 from the merger of two black holes. Since then, LIGO has announced the detection of two more such mergers. A fourth was just reported (27 September 2017), which was the first detected by both LIGO and Virgo. However, despite the huge amount of energy released in these processes, none of this is detectable as radiation in any part of the electromagnetic spectrum. Since the first LIGO detection astronomers have been searching for possible electromagnetic counterparts to gravitational wave detections. 
 
Large international collaboration of astronomers rushed to observe source
 
On 17 August 2017 LIGO and Virgo detected the first ever gravitational waves resulting from the merger of two neutron stars. Neutron star mergers produce massive explosions called kilonovae which will produce a specific electromagnetic signature. After the detection of the gravitational wave, telescopes around the world started searching for the optical counterpart, and it was discovered to be located in an elliptical galaxy, NGC4993, 130 million light years away. A large international collaboration of astronomers, including Dr Van Soelen and Szegedi, rushed to observe this source.
 
At the Boyden Observatory, Dr Van Soelen and Szegedi used the Boyden 1.5-m optical telescope to observe the source in the early evening, from 18 to 21 August. The observations obtained at Boyden Observatory, combined with observations from telescopes in Chile and Hawaii, confirmed that this was the first-ever detection of an electromagnetic counterpart to a gravitational wave event. Combined with the detection of gamma-rays with the Fermi-LAT telescope, this also confirms that neutron star mergers are responsible for short gamma-ray bursts.  
 
The results from these optical observations are reported in A kilonova as the electromagnetic counterpart to a gravitational-wave source published in Nature in October 2017.
 
“Our paper is one of a few that will be submitted by different groups that will report on this discovery, including a large LIGO-Virgo paper summarising all observations. The main results from our paper were obtained through the New Technology Telescope, the GROND system, and the Pan-STARRS system. The Boyden observations helped to obtain extra observations during the first 72 hours which showed that the light of the source decreased much quicker than was expected for supernova, classifying this source as a kilonova,” Dr Van Soelen said.

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept