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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

To tan or not to tan: a burning issue

2009-12-08

Prof. Werner Sinclair

“Some evidence exists which implies that sunscreens could indeed be responsible for the dramatic rise in the incidence of melanoma over the past three decades, the period during which the use of sunscreens became very popular,” says Prof. Werner Sinclair, Head of the Department of Dermatology at the University of the Free State. His inaugural lecture was on the topic Sunscreens – Curse or Blessing?

Prof. Sinclair says the use of sunscreen preparations is widely advocated as a measure to prevent acute sunburn, chronic sun damage and resultant premature skin aging as well as skin malignancies, including malignant melanoma. There is inconclusive evidence to prove that these preparations do indeed achieve all of these claims. The question is whether these preparations are doing more harm than good?

He says the incidence of skin cancer is rising dramatically and these tumours are induced mostly by the ultra-violet rays.

Of the UV light that reaches the earth 90-95% belongs to the UVA fraction. UVC is normally filtered out by the ozone layer. UVB leads to sunburn while UVA leads to pigmentation (tanning). Because frequent sunburn was often associated with skin cancer, UVB was assumed, naively, to be the culprit, he says.

Exposure to sunlight induces a sense of well-being, increases the libido, reduces appetite and induces the synthesis of large amounts of vitamin D, an essential nutritional factor. The use of sunscreen creams reduces vitamin D levels and low levels of vitamin D have been associated with breast and colon cancer. Prof. Sinclair says the 17% increase in breast cancer from 1981 to 1991 parallels the vigorous use of sunscreens over the same period.

Among the risk factors for the development of tumours are a family history, tendency to freckle, more than three episodes of severe sunburn during childhood, and the use of artificial UV light tanning booths. He says it remains a question whether to tan or not. It was earlier believed that the main carcinogenic rays were UVB and that UVA merely induced a tan. The increase in UVA exposure could have severe consequences.

Prof. Sinclair says the UV light used in artificial tanning booths consists mainly of pure UVA which are highly dangerous rays. It has been estimated that six per cent of all melanoma deaths in the UK can be directly attributed to the use of artificial tanning lights. The use of an artificial tanning booth will double the melanoma risk of a person. “UVA is solely responsible for solar skin aging and it is ironical that tanning addicts, who want to look beautiful, are inflicting accelerated ageing in the process,” he says.

On the use of sunscreens he says it can prevent painful sunburn, but UVA-induced damage continues unnoticed. UVB blockers decrease vitamin D synthesis, which is a particular problem in the elderly. It also prevents the sunburn warning and therefore increases the UVA dosage that an individual receives. It creates a false sense of security which is the biggest problem associated with sunscreens.

Evidence obtained from the state of Queensland in Australia, where the heaviest and longest use of sunscreens occurred, boasted the highest incidence of melanoma in the world. A huge study in Norway has shown a 350% increase in melanoma for men and 440% for women. This paralleled the increase in the use of UVB blocking sunscreens while there was no change in the ozone layer. It did however, occur during that time when tanning became fashionable in Norway and there was an increase especially in artificial tanning.

Prof. Sinclair says: “We believe that sunscreen use does not directly lead to melanoma, but UVA exposure does. The Melanoma Epidemic is a reality. Sunscreen preparations are not the magical answer in the fight against melanoma and the irresponsible use of these preparations can worsen the problem.”

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt.stg@ufs.ac.za
7 December 2009

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