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Use of Additive Based on Non-Timber Forest Products for the Ecological Stabilization of Raw Earth:Case of the Parkia Biglobosa Nut and vitellaria paradoxa

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Journal of Renewable Materials 2023年第12期11卷 4143-4160页

作者： Bio Chéïssou Koto Tamou Jean-Michel Mechling Crespin Prudence Yabi Gildas EdjrossèF.Godonou Edmond Codjo Adjovi Mohamed Gibigaye AndréLecomte Nicolas Brosse L2EGC-Laboratory of Studies and Tests in Civil Engineering University of SciencesTechnologyEngineeringand MathematicsAbomeyBenin IJL-Jean Lamour Institute University of LorraineNancyFrance LEMA-Laboratory of Energetics and Applied Mechanics University of Abomey-CalaviAbomey-CalaviBenin LERMAB-Study and Research Laboratory on Wood Material University of LorraineNancyFrance

The housing sector today uses elaborate materials such as cement,iron,sand,often prohibitively expensive and whose production generates a strong environmental impact(scarcity of resources,transport,greenhouse gas greenhouse,etc.).In order to meet the challenges of sustainable development,earth construction is experiencing a resurgence of interest these *** its many advantages,raw earth material has drawbacks,in particular its low mechanical resistance and its loss of geometric characteristics in the face of water,which slow down its *** part of this study,the mechanical characteristics and durability of raw earth were improved by using residual water from the processing of Parkia Biglobosa(nere)and vitellaria paradoxa(shea)nuts in order to optimize its use for the construction of modern *** this end,the decoctions resulting from the artisanal transformation of the nut of the Parkia Biglobosa into African mustard and of the vitellaria paradoxa into shea butter were added to the raw earth according to volume proportions of 25%,50%,75%and 100%of the aqueous solution to obtain the projected ***,mechanical characterization and durability tests were carried out on the composites *** results revealed that the decoctions of vitellaria paradoxa and Parkia Biglobosa improve the compressive strength of the material by up to 90%and 260%,***,these decoctions improved the resistance to water penetration of the 100%additive composite by 1.5 times for vitellaria paradoxa and 5 times for Parkia *** study shows that it is possible to use decoctions as raw earth stabilizers to build modern,ecological buildings at lower energy ***,more in-depth studies on surface wettability and long-term durability are planned to better characterize the geomaterial.

关键词： Raw earth organic additive adobe vitellaria paradoxa Parkia Biglobosa durability

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