Technical feasibility of direct application of the Nigerian tar sand deposits as road asphalt.
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Date
2010
Authors
Akinmosin, A
Shoyemi, A.O
Journal Title
Journal ISSN
Volume Title
Publisher
Pacific Journal of Science and Technology
Abstract
Tar sand samples were collected at five locations
in parts of Southwestern Nigeria, and were
analyzed to determine their direct application as
road asphalt surfacing material. Seven samples
were selected out fifteen samples collected in the
field for this analysis using the Marshall test
method. The test involved determination of
bitumen saturation, stability, flow, density, specific
gravity, etc. on the samples. The stability values
ranged from 14.0% to 40.0%; density ranged from
1.70kg/m3
to 1.92kg/m3
, and general specific
gravity values of 1.01 and 1.92 were obtained for
the bitumen and mixed aggregate, respectively.
The Marshall test result indicates that two out of
the seven samples (AG20 and AG8) can be
applied directly, having flow values of 13mm and
15mm, respectively, and with a reasonably high
bitumen saturation (>30%). Other samples with
low stability and low bitumen saturation (<30%)
require further analysis on Design Mix which was
carried out in order to increase their stability. This
involved the addition of certain materials like
coarse aggregate and fillers to increase the
stability and wearing course of the samples.
Result of the Design Mix showed increase in
specific gravity, density and stability values that
are favorable for direct application.
Description
Keywords
asphalt , bitumen , tar sand , aggregates , mix , stability
Citation
Akinmosin, A., & Shoyemi, A. O. (2010). Technical feasibility of direct application of the Nigerian tar sand deposits as road asphalt. Pacific Journal of Science and Technology, 11(1), 1-13.