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GREEN CHEMISTRY &
TECHNOLOGY
7
th
International Conference on
J u n e 1 8 - 2 0 , 2 0 1 8 | D u b l i n , I r e l a n d
Journal of Industrial and Environmental Chemistry
|
Volume 2
Page 38
Note:
T
he use of bio-ash as partial substitute for cement in civil engineering
works, has the potential to reduce the overall net carbon dioxide
contribution of the construction sector to the environment. Studies in
the chemical stabilization of lateritic soils indicate the possibility of a
relationship between the cation exchange capacity of lateritic soils and
the optimal amount of pozzolanic ash required to affect a modification
for soil stabilization purposes. This study investigates this further, using
corn cob ash (CCA) and an A-2-7 lateritic soil as case study. Metallic
oxide composition of soil and CCA respectively were determined using
the X-ray fluorescence equipment from which the cation exchange
capacity of the soil was determined. Various samples of soil-cement,
soil-cement-CCA and soil-CCA were thereafter prepared and subjected
to unconfined compressive strength (UCS) test, following the
procedures of BS 1377-7:1990. Attempts to confirm the presence of
silicates of potassium (K
2
SiO
3
) and magnesium (M
8
Si
8
O
20
(OH)
8
•12H
2
O)
in the stabilized soil using Scanning Electron Microscopy (SEM)
examination were inconclusive. The cation exchange capacity of the
soil was theoretically determined as 1.45%, which is close to the CCA
content of 1.5% that returned the highest UCS value. Further work is
required to account for the different roles of potassium, calcium and
magnesium (usually present in pozzolanic ash) in the stabilization of
lateritic soils.
Biography
Apampa O Ahmed is a professional Civil Engi-
neer and Academician with a total of 30 years’
experience in industry, teaching and research. He
holds a PhD degree in Civil Engineering and is cur-
rently Principal Lecturer and the Director, School
of Engineering at the Moshood Abiola Polytech-
nic, Abeokuta, Nigeria. He has over 30 published
works to his credit and several other unpublished
technical reports and engineering analysis works.
He is a Fellow of the Nigerian Society of Engi-
neers, an Examiner at Civil Engineering Profes-
sional Examinations in Nigeria as well as Editorial
Adviser to a number of conference and journal
publications.
pampasng@yahoo.comAN INVESTIGATION OF THE
MICROSTRUCTURE OF A
LATERITIC SOIL STABILIZED
WITH CORN COB ASH
Apampa O Ahmed
Moshood Abiola Polytechnic, Nigeria
Apampa O Ahmed, J Ind Environ Chem 2018, Volume 2 | DOI: 10.4066/2591-7331-C1-001