Influence of moisture and geofluids (GF) on the morphology of quarry fines treated lateritic soil
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Cleaner Engineering and Technology
Abstract
The influence of moisture migration in the form of GF on the morphology of lateritic soil has been studied with
laboratory experiments. This was important due to the effect of adsorbed moisture during molding moisture
addition in a stabilization protocol that gives rise to hydration. In addition, moisture adsorption and absorption
play a very vital engineering role during the seasonal changes of wet and dry seasons when the water table rises
and drops. This occurrence brings about alternate effects of wetting and drying of hydraulically bound structures
like in pavement foundations. Therefore, it was pertinent to study how these changes affect soil microstructure to
enable good design decisions. The soil used in this exercise was classified as highly plastic, poorly graded A-7-6
soil group according to AASHTO classification method. The soil was mixed with various proportions of quarry
fines under different molding moisture conditions and the specimens were prepared for scanning electron microscopy
(SEM) exposure. The results of the SEM exposure showed that GF applied here as molding moisture
improve the agglomeration of treated soil particles to form flocs in a stabilization process. However, the microspores
and crack propagation were observed more in the structure with less amount of quarry fine, i. e., at 2%
QF than that at 4% QF. This showed the pozzolanic effect of QF on soil under the influence of GF. GF in all its
forms should be studied for sustainable earthwork design and construction.
Description
Keywords
GF, Absorbed & adsorbed fluid, Geomorphology, Double diffused layer (DDL), Soil stabilization, Soil-ash interaction
Citation
Onyelowe, K. C., & Obianyo, I. I. (2021). Influence of moisture and geofluids (GF) on the morphology of quarry fines treated lateritic soil. Cleaner Engineering and Technology, 3, 100120. https://doi.org/10.1016/j.clet.2021.100120