@Article{jrm.2023.030509,
AUTHOR = {Bio Chéïssou Koto Tamou, Jean-Michel Mechling, Crespin Prudence Yabi, Gildas Edjrossè F. Godonou, Edmond Codjo Adjovi, Mohamed Gibigaye, André Lecomte, Nicolas Brosse},
TITLE = {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},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {12},
PAGES = {4143--4160},
URL = {http://www.techscience.com/jrm/v11n12/54559},
ISSN = {2164-6341},
ABSTRACT = {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 days. Despite 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
development. As 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 buildings. To 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 composites. Thus, mechanical characterization and durability tests were
carried out on the composites obtained. The results revealed that the decoctions of Vitellaria Paradoxa and Parkia
Biglobosa improve the compressive strength of the material by up to 90% and 260%, respectively. Furthermore,
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 Biglobosa. This study shows that it is possible to use decoctions as
raw earth stabilizers to build modern, ecological buildings at lower energy costs. However, more in-depth studies
on surface wettability and long-term durability are planned to better characterize the geomaterial.},
DOI = {10.32604/jrm.2023.030509}
}