| Summary: |
The strength gain of stabilized soils is not only influenced by the type and proportion of the stabilizers and its
curing time, but also by the water content needed to maintain the reaction. The reaction of lime – RHA with
soil is pozzolanic. Hence, the process will be subjected greatly by the amount of water to react with
admixtures and the proportion of the stabilizer. This paper presents the result of a laboratory study on the
unconfined compressive strength (UCS) of soils stabilized with lime and RHA, compacted at the OMC, and at
the dry and wet side of OMC. The amount of lime required for stabilization (LRS) is determined by Eades
and Grim's Method. The results showed that the water content determines the UCS characteristics of
unstabilized and stabilized soils. The UCS of stabilized soils decreased with increasing molding water
content, but it is still higher than of the un-stabilized soils. In general, higher lime content results to a higher
UCS. The maximum strength of the stabilized soil is attained at lime/RHA ratio of 1/2. The UCS of the
stabilized soil increased significantly about 7 – 9 times to the un-stabilized UCS.
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