1. LightSHIP Inorganic Binder Systems for Innovative Panel Technology in East Africa G. J. G. Gluth, W. Z. Taffese, G. S. Kumaran, H. C. Uzoegbo, H.-C. Kühne

2. Urban population *projection Urban population in Africa World Urbanization Prospects: The 2007 Revision; United Nations: New York, 2008.

5. KIST Kigali Institute of Science and Technology

6. University of the Witwatersrand, Johannesburg

7. BAM Federal Institute for Materials Research and Testing

8. German-African Business Association

9. Consido AGAddis Ababa African partners Kigali Johannesburg European partners www.google.de/maps

11. Analysis of problems and possibilities of the participating African countries related to the design, application and testing of building materials

12. Evaluation of possible approaches to overcome these problems and ultimately to develop new building materials for East Africa

13. Preparatory tests on available building materials

14. Development and preparation of follow-up cooperationProject objectives

16. optimised fabrication process and minimization of risk of failures

17. Elements should be easily transportable and easy to assemble.

18. The materials should be produced with the highest possible fraction of local resources.

19. Existing know-how in the participating countries should be used.

22. Compressive strength (28 d): 18.8 MPa

23. Flexural strength (28 d): 1.3 MPa

25. Water absorption: 9.4%

27. Total thickness of board: 101 mm

28. Thickness of panels: 3 mm

29. Max. bending moment: 1.5 kNm/m

31. too expensive; mostly imported; high energy consumption and CO2 emission

32. Magnesium oxychloride cement

35. Dissolution of silicate in alkaline solution

37. compacted: up to ~40 MPa

38. Flexural strength: ~3 MPa

40. Dissolution of silicate and aluminate species in alkaline solution

41. Condensation and gelation of alkaline aluminosilicate gel

43. Flexural strength: up to ~8 MPa

45. Conventional binders based on Portland cement are too expensive.

46. Alternative binder systems could be lime-pozzolan binders or geopolymers based on natural pozzolans.

47. Abundant in East Africa

48. Cheap

49. Already in use

50. Contribution to less energy consumption and CO2 release

51. Lime-pozzolan binders can be strong enough to produce artificial stones.