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Journal of Materials Science and Nanotechnology | Volume 3
February 25-26, 2019 | Paris, France
Materials Science and Engineering
2 nd International Conference on
Study of the influence of cement stabilized soil granulary on its thermal diffusivity: The case of the
Odometa (Benin) lateritic gravelly soil
O D Samah1, K B Amey2, W N Bayor2, M Gbedahi 3, A Vianou3 and E Sanya3
1 Centre of Construction and Housing, Togo
2 National High Engineering School, Togo
3 University of Abomey- Calavi, Benin
When there is a difference in temperature between
two systems or two bodies, heat exchange by heat
transfer is naturally occurs which is one of the best known
modes either by conduction, convection or radiation. But
there are often temperature differences between the points
of the universe, the phenomena of heat transfer appear as
universal. In many countries of the South Sahara, especially
those with a hot climate, there is a massive use of locally
available materials such as sand, clay, lateritic gravelly soil,
etc. in the construction of roads and housing constructions.
The present study highlights the influence of soil granularity
on its thermal diffusivity in pavement structures. This lateritic
gravelly soil is taken from a quarry in Odometa, a town located
in Benin. To do this, the identification tests carried out on the
material have allowed, according to the Highway Research
Board (HRB) classification system, to specify that the material
is of class A-2-7.Indeed, the grain size analysis gives for grain
sizes of 0.08mm, 14.6%passing and for grains of 31.5mm, 100%
passing.
Similarly, the Atterberg limits tests yield the following results:
liquidity limit WL=49; plasticity limit WP=31; the plasticity index
IP=18.
The Proctor test gives for raw material: ωopt=8.3% with
dsopt=2.125, CBR (at 95% of OPM)=45 and for the material
stabilized at 4%: ωopt=8.2 with dsopt=2,278, CBR (95% of OPM) =
197.1. The specific gravity is ρs=2,684
To better appreciate this phenomenon, the comparative tests
are performed on lateritic gravelly soil and silty sand with the
same granularity (d<1.25mm) and stabilized with cement. The
results obtained respectively give a value of 1.85 10-2 m²/s and
3.45 10-2 m²/s for their thermal diffusivity.
Speaker Biography
O D Samah has completed his Civil Engineering and Master of Technical Sciences at
the age of 28 years from Leningrad Institute of Construction, USSR and Doctorate
at the age of 52 years from Abomey-Calavi University, Cotonou, Bénin. He is the
Director General of Regional Road Maintenance Training Centre, Lomé, Togo. He has
publications that have been cited several times, and some of them are indexed in well
knowned and reputed journals.
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