Effect of humic acid on geochemistry properties of kaolin
Organic soil is always known as problematic soil because of its engineering properties are inferior from other soft soils and/or because its behaviour may deviate from traditional rules of soil behaviour which makes it difficult to predict and design. Considerable research has been carried out over...
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| Main Authors: | , , , |
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| Format: | Article |
| Published: |
Trans Tech Publications, Switzerland
2013
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.4028/www.scientific.net/AMR.701.310 http://dx.doi.org/10.4028/www.scientific.net/AMR.701.310 http://eprints.uthm.edu.my/5275/1/faizal_pakir_U.pdf |
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| Summary: | Organic soil is always known as problematic soil because of its engineering properties
are inferior from other soft soils and/or because its behaviour may deviate from traditional rules of
soil behaviour which makes it difficult to predict and design. Considerable research has been
carried out over the years on organic soils, particularly peat soil which consists of various
components of organic matter but the effect of particular organic matter is less reported. Hence, this
study is carried out to determine the effect of humic acid (a kind of humified organic matter) on
kaolin (which is widely studied). This paper addresses the influence of humic acid (30% and 50%
of dry mass) on kaolin's geochemistry properties namely Atterberg limits, compaction, specific
gravity and Loss on Ignition (LOI). The findings of the study showed that the contents of humic
acid had altered the behaviour of kaolin. The loss on ignition increased linearly with the increment
of humic acid. However, the specific gravity, maximum dry density and Atterberg limits decreased
with addition of humic acid. Atterberg limits decreased as the humic acid increased is believed to be
due to the nature of humic acid which precipitated under acidic environment. |
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