TITLE:
Thermo-Mechanical Properties Study of Stabilized Soil Bricks to Sugar Cane Molasses and Cassava Starch Binders
AUTHORS:
Narcisse Malanda, Jean Albin Nkaya, Gilbert Ganga, Ngambara Emamou Nondel Durvy, Paul Louzolo-Kimbémbé
KEYWORDS:
Clay, Molasses, Cassava Starch, Heating, Compressed Soil Brick, Mechanical Resistance
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.13 No.2,
February
28,
2023
ABSTRACT: The
current study deals Swith thermo-mechanical properties of stabilized soil small
bricks with the help of organic binders of sugar cane molasses and cassava
starch. Different formulations of soil concrete have been suggested after the
geotechnical characterization of samples of soil was taken. From these, it arises that the studied soil is the most
plastically clay (of type A3) according to GTR classification.
Samples made of small bricks and measured out at 4%, 6% and 8% of binders
(molasses, starch or molasses + starch) have been warmed up to different
temperatures (100°C, 150°C, 200°C and 250°C) for the rising of the thermic
behavior under different conditions and submitted to crushing testings for the
estimation of characteristic resistances to the compression. According to the
mechanical behavior, we note an improvement of resistances for small bricks
measured 4%, 6% and 8%, of molasses respectively of 32.44%, 32.06% and 23.43%
against the value of reference for small bricks without molasses. In the same
way, the binder (molasses + starch) also reveals an improvement of resistance
to the compression of 13.27%, 26.17% and 26.17%. On the contrary, the
stabilization with the starch binder did not bring a significative improvement.
According to the thermic influence, the heating at 100°C of stabilized small
bricks at 4%, 6% and 8% of molasses, reveals a significative improvement of
resistances. Moreover, the stabilization with the starch reveals on the contrary a good behavior for heatings at 150°C and 250°C. In short,
for the binder (molasses + starch), it is the heating at 200°C that shows some
improvements of remarkable resistances. Different analyses of realized
statistics also show the effectivity of obtained results. For all realized
formulations, the measuring out at 6% of binders (molasses, or molasses + starch)
seems as optimal in front of the best thermo-mechanical revealed properties.