africa re:load 14 Gluth - Inorganic Binder Systems for Innovative Panel Technology in East Africa
LightSHIP<br />Inorganic Binder Systems for Innovative Panel Technology in<br />East Africa<br />G. J. G. Gluth, W. Z. Taffese, G. S. Kumaran, H. C. Uzoegbo, H.-C. Kühne<br />
Urban population<br />*projection<br />Urban population in Africa<br />World Urbanization Prospects: The 2007 Revision; United Nations: New York, 2008.<br />
Need for affordable building materials<br />Large increase in urban population<br />e.g., population of Addis Ababa has doubled nearly every decade<br /><ul><li>Associated problem of enormous pressure on social and physical infrastructures (slums)</li></ul>Alemayehu, E. Y. PhD Thesis, Norwegian University of Science and Technology, Trondheim, 2008.<br /><ul><li>Large need for affordable buidling materials to construct housings, public buildings etc.</li></li></ul><li>Magnesia boards<br />Approach in Addis Ababa: production of partition boards from magnesium oxychloride cement<br />
The LightSHIP project<br />Partners:<br /><ul><li>EiABC / Addis Ababa University
KIST Kigali Institute of Science and Technology
<ul><li>Generation of a continuing scientific partnership in the sector of building materials research
Analysis of problems and possibilities of the participating African countries related to the design, application and testing of building materials
Evaluation of possible approaches to overcome these problems and ultimately to develop new building materials for East Africa
Preparatory tests on available building materials
Development and preparation of follow-up cooperation</li></ul>Project objectives<br />
Specifications for building materials<br /><ul><li>Pre-fabricated elements are to be prefered.
optimised fabrication process and minimization of risk of failures
Elements should be easily transportable and easy to assemble.
The materials should be produced with the highest possible fraction of local resources.
Existing know-how in the participating countries should be used.
Artificial stones and partition boards</li></li></ul><li>Lightweight concrete: mix design<br />Superplasticizer:<br />PCE1.38 kg/m³<br />(0.44% of cement mass)<br />* Blend of CEM I 32.5 R and CEM I 52.5 R (50% each)<br />** Water which is absorbed by the lightweight aggregates in the first 10 minutes.<br />
poor water resistance</li></ul>Alternative: natural pozzolans (volcanic rock)<br /><ul><li>Abundant in East Africa because of the Great Rift Valley ( flood basalts)</li></ul>Addis Ababa<br /><ul><li>Easily available (open-pit mining)</li></ul>Kigali<br /><ul><li>Already used: pumice as filler or aggregate for concrete and mortar</li></ul>Dar es Salaam<br />Linlongwe<br />Wood, J.; Guth, A. (Michigan Technological University) http://geology.com/articles/east-africa-rift.shtml <br />
Precipitation of calcium silicate hydrates (and other hydrates)</li></ul> SiO2 + xCa(OH)2 + yH2O -> xCaO∙SiO2∙(x+y)H2O [“C-S-H“]<br />Ortega E. A. et al. Cem. Concr. Res. 2000,30, 1641-1646.<br /><ul><li>Compressive strength: up to ~20 MPa
Contribution to less energy consumption and CO2 release
Lime-pozzolan binders can be strong enough to produce artificial stones.
The production of partition boards from lime-pozzolan binders may require the use of fibre reinforcement. Use of geopolymers?</li></li></ul><li>Thank-you‘s<br />Thank you<br />for your kind attention!<br />Funding:<br />