Impact of pH Water and Mineralogical Microstructure of Soil Mixed with Wood Waste on the Compressive Strength of Composite Bricks; and Bricks Resistance Modeling ()
Affiliation(s)
1National Advanced School of Engineering, University Marien NGouabi, Brazzaville, Congo.
2Center for Research and Initiation of Technology Projects (CRIPT), Brazzaville, Congo.
3Laboratory of Mechanics, Energtics and Engineering, ENSP-UMNG, Brazzaville, Congo.
4Faculty of Science and Technology, University Marien NGouabi, Brazzaville, Congo.
5Centerof Géological and Mining Research (CRGM), Brazzaville, Congo.
ABSTRACT
This study includes the manufacture of cement stabilized
clay bricks with embedded mahogany chips. The impact of this waste and its interaction
with water in the bricks was evaluated on the mechanical properties. The compressive
strength tests using a universal press were carried out on bricks with and without
adding wood chips. The results obtained show that the incorporation of wood chips
into the bricks decreases the compressive strength. This reduction in compressive
strength led us to conduct an analysis of clay and water as intrinsic factors, before
and after incorporation of untreated wood
waste. Thus, a mineralogical analysis of the
clay with and without mahogany chips was made using an X-ray diffractometer, using
an anticathode of cobalt with the line Κα, of wavelength λ = 1789Å. After quantification of the mineral constituents, it is noted that the
concentration of SiO2 decreases considerably in the clay with addition of wood chips, resulting in the reduction
of the compressive strength in these composite materials (from Rc = 9.26 MPa at
0% of chips to 3.55 MPa at 8%). A mathematical model
following the interpolations of Lagrange was then proposed. The analysis of the
water resulting from the impregnation of dry wood chips in the water, shows that
the water becomes strongly acid (pH = 4.3 at the 7th day of immersion), thus contributing
to the reduction of resistance. This analysis of intrinsic factors will allow future
studies to take into account the treatment of wood waste by different processes
in order to increase the mechanical, thermal and acoustic properties of composite
bricks with the same contents, thus generating massive support for the use of its
composite materials.
Share and Cite:
Ganga, G. , Malanda, N. , Ngoma, D. , Nsongo, T. and Gadet, M. (2020) Impact of pH Water and Mineralogical Microstructure of Soil Mixed with Wood Waste on the Compressive Strength of Composite Bricks; and Bricks Resistance Modeling.
Open Journal of Civil Engineering,
10, 9-21. doi:
10.4236/ojce.2020.101002.
Cited by
No relevant information.