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#KovsiesCare: Unique building project inspires entire community

12 July 2019 | Story Leonie Bolleurs

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.”

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.

News Archive

Research by experts published in Nature

2011-06-02

The members of the research group are, from the left, front: Christelle van Rooyen, Mariana Erasmus, Prof. Esta van Heerden; back: Armand Bester and Prof. Derek Litthauer.
Photo: Gerhard Louw

A research article on the work by a team of experts at our university, under the leadership of Prof. Esta van Heerden, and counterparts in Belgium and the USA has been published in the distinguished academic journal Nature today (Thursday, 2 June 2011).

The article – Nematoda from the terrestrial deep subsurface of South Africa – sheds more light on life in the form of a small worm living under extreme conditions in deep hot mines. It was discovered 1,3 km under the surface of the earth in the Beatrix Goldmine close to Welkom and is the first multi-cellular organism that was found so far beneath the surface of the earth. The worm (nematode) was found in between a rock face that is between 3 000 and 12 000 years old.

The research can shed some new light on the possibility of life on other planets, previously considered impossible under extreme conditions. It also expands the possibilities into new areas where new organisms may be found.

These small invertebrates live in terrestrial soil subjected to stress almost for 24 hours They live through sunshine, rain, scorching temperatures and freezing conditions. Through time they developed a means to cope with harsh conditions. Terrestrial nematodes (roundworms, not to be confused or related to earthworms) are among those very tough small invertebrates that deal with those conditions everywhere. After insects they are the most dominant multi-cellular (metazoan) species on the planet having a general size of 0,5 to 1 mm and are among the oldest metazoans on the planet, Nature says in a statement on the article.

They inhabit nearly every imaginable habitat form the deep seas to the acid in pitcher . Some nematodes simply eat bacteria and these are the ones we study here. Terrestrial nematodes have developed a survival stage that can take them through hard times (absence of food, extreme temperatures, too little oxygen, crowding, and more).

At the head of the research was Prof. Gaetan Borgonie of the Ghent University in Belgium and a world leader in the discipline of nematode research. He was brought into contact with the South African research leader, Prof. Esta van Heerden, who set up a cooperation agreement with the University of Ghent and Prof. Borgonie. Prof. Van Heerden manages the Extreme Biochemistry group at the UFS and the research was funded by several research grants.

The search for worms began in earnest in 2007, but it was soon clear that the sampling strategy was insufficient. A massive sampling campaign in 2008-2009 in several mines led to the discovery of several nematodes and the new nematode species Halicephalobus mephisto. It is named after the legend of Faust where the devil, also known as the lord of the underworld is called Mephistopheles.

Nature says special filters had to be designed and installed on various boreholes. Unfortunately, there is no easy way of finding a magic formula and designs had to be adapted by trial and error; improving existing designs all the time. The work of the UFS Mechanical Workshop, which manufactured, adapted and helped design it, was crucial in this respect. Filters were left on the holes for varying periods, sometimes for a few hours and sometimes for months. Prof. Derek Litthauer from the UFS played a big role in sampling, filter designs and coming up with ideas for names for the new nematode with Prof. Borgonie.

Research showed that the nematodes can live in the deep for up to 12 000 years. Three students – Armand Bester, Mariana Erasmus and Christelle van Rooyen from the UFS – did the work on this.

The importance of multi-cellular animals living in the ultra-deep subsurface is twofold: The nematodes graze on the existing bacterial population and influence their turnover. Secondly, if more complex multi-cellular organisms can survive in the deep subsurface on earth, this may be good news when looking for life on other planets where the surface is considered too inhospitable (e.g. Mars). Complex life forms can be found in ecosystems previously thought to be uninhabitable. Nature says this expands the possibilities into new areas where new organisms may be discovered.

Future research will focus on selective boreholes to look for more metazoans, so that a better idea of the complexity of the ecosystems there can be obtained. It will also look for metazoans in the deep subsurface on other continents to determine similarities and differences.

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