Ecological stabilization of raw earth by adding additives based on non-timber forest products: Case of Parkia biglobosa seets and Vitellaria paradoxa nuts
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报告嘉宾：KOTO TAMOU Bio Chéissou
嘉宾单位：National University of Sciences, Technologies, Engineering and Mathematics，Benin
The facings of earthen walls in the conditions of their commissioning are subject to water infiltration by capillarity, humidity and a weakening of the compressive strength. With the aim of developing processes for ecological stabilized raw earth bricks and at lower energy cost to improve the mechanical characteristics and durability of raw earth constructions, this work studies the reuse of wastewater from the processing of parkia biglobosa seets and vitellaria paradoxa nuts as stabilizers.
To this end, decoctions of parkia biglobosa seets and vitellaria paradoxa nuts were added to the raw earth in defined proportions and then chemical, mineralogical, mechanical and durability characterization tests were carried out. The results revealed that the two extracts consist of the same sugars but in different proportions. As well ; vitellaria paradoxa nuts extract and parkia biglobosa seets decoction improve the material's compressive strength by 20% and 80% respectively, and its behavior in water by 4 and 8 times.