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This project is located in Msitu wa Tembo, a rural community in Northern Tanzania. It was realized by Cony Chang (Taiwan) and Veronique Vincent Genod (France), in collaboration with C-re-aid, a Tanzanian NGO that conducts research, design and construction under the aim of poverty alleviation by closely working with local organizations, communities and craftsmen. Their “Groundwork” program provides an invaluable opportunity for international students and recent graduates of building sciences to put their developing skills to practical use, for the benefit of the local communities in Tanzania.
The beneficiary of this project is Kazi Na Sala (KnS) women’s group. They were introduced to C-re-aid by TATU Project that works closely with KnS to provide the women with a platform to express themselves and develop their own skills and abilities; facilitate access to new resources and opportunities for personal and professional development. For this project, Cony and Veronique worked on a storage room and a small shop for KnS that allows them to start their business. In the future the women should be able to expand their building and the provided infrastructure to their needs.
After the several interviews with the women, the students realized that they needed a community building that allowed them to store their products safely and a small shop for the commercial activities; besides, the women also wanted a lifted veranda as an open shaded space that allows them to gather for group activities or social interaction. The students also discovered that they were lacking of a communal space that was suitable for all the activities, as currently most of the group activities are taking place under a tree on a small clearing.
This building includes three parts: A storage room (14m2), a small shop (6m2) and a veranda (11m2); all three connected. The building has a “L” shape and faces south towards the main road.
The most traditional way of building in Msitu wa Tembo is with mud bricks. Cony and Veronique wanted to experiment a new building technique that could serve as a learning process for the organization’s future initiatives, as well as to involve the women in the building process to improve their self-awareness and skills. After some research and reflection, they finally decided to build with plastic bottles filled with sands and local fired bricks as pillars and horizontal farmings.
To create ventilation in such thick walls, the students chose PVC plastic pipes, which have similar size and round shape as the bottles, to be easily inserted in-between them. Moreover, to make these walls more secure - considering that the plastic part could be easily damaged, especially by children - a lime plaster covered completely the outside part of the walls, and inside part of the shop. For the storage room, the caps of the bottles are still visible. This building technique, associated to a plaster finishing, creates really strong and compact walls (around 30cm, the length of 1.5L bottles), allows the interior space to stay at a very cool and comfortable temperature in such a hot region.
To avoid overheating inside the building, the wooden truss leaves a space for ventilation, creating a sloped roof structure with the highest part one meter high facing the south (Tanzania is located below the equator). The roof structure significantly improved the ventilation and allows daylight to come in easily, also creating a welcoming atmosphere for the shop. For safety reasons, trusses are all closed with wire mesh and steel bars. The veranda is shaded, providing a cool place for the group activities and to welcome the future costumers in a nice outdoor space.
There were several challenges throughout the construction but the students were able to finished the project with limited budget and timeframe. After 7 weeks – 25 days of intensive work – now the "bobo building” (in Swahili “bobo” means bottle) was completed. This building consist of 2,600 plastic bottles, where all the soil comes from the ground on site. Around 30 women helped to fill the plastic bottles.