| Summary: |
The well established techniques of soil stabilization often use such
cementing agents as Portland cement, lime, etc. Replacement of those
cementing materials with industrial or agricultural by-product is highly
desirable. Rice husk ash is a very potential paddy crop waste as
pozzolanic materials which result in a superior properties when
combined with cement or other cementing agents. This paper presents the
laboratory study on the stabilized soils with cement and rice husk ash.
The experimental study included the evaluation of such properties of the
soil as consistency limits, compaction, unconfined compressive strength,
and X-Ray diffraction. Three types of soils are used in this study i.e
granite residual soils, kaolinite clay and montmorillonite clay
(bentonite). Test results show that both cement and rice husk ash reduces
the plasticity of soils. In term of compactability, addition of rice husk ash
and cement decreases the maximum dry density and increases the
optimum moisture content. From the viewpoint of plasticity, compaction
and strength characteristics, and economy, addition of 6 – 8 percent
cement and 10 – 15 percent rice husk ash are recommended as an
optimum amount for soils stabilization.
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