Abstract:
Soil is a collection of natural mineral granules (Ageregat) which can be
separated by a mechanical means if the ageregat is stirred in water or a collection
of minerals, organic matter and loose deposits, which are located above the
bedrock. Rocks are the ones whose minerals are bound together by cohesive
forces that are permanent and strong, and cannot be separated by simple
mechanical means. The ground is the basis of a structure or construction, both
building construction and road construction. For this reason, there is a need for soil
improvement in order to increase the carrying capacity of the soil, one of which is
by chemically improving the soil.
This study was emphasized to analyze soil characteristics using the
stabilization method using Rice Husk Ash and PCC Cement according to the
variation of each stabilization material to the CBR Value parameter. In addition to
determining the physical characteristics of the soil that has not been stabilized, this
research is also focused on knowing the level of the stabilized material that
provides optimum carrying capacity on the soil. The percentage of stabilization
materials used in this study were Rice Husk Ash and Portland Composite Cement:
20% PCC + 0% ASP, 16% PCC + 4% ASP, 12% PCC + 8% ASP, 8% PCC + 12%
ASP, 4% PCC + 16% ASP and 0% PCC + 20% ASP. The soil is mixed with
stabilization materials according to the percentage of the ingredients evenly. CBR
testing results for soil stabilization with Rice Husk Ash and Portland Composite
Cement Cement, reached the maximum CBR Unsoaked value at the addition of
16% PCC + 4% ASP to 0.1 "by 33.40%, to 0.2" by 31.50% Sedangkang for CBR
Soaked reaching maximum value on the addition of 16% PCC + 4% ASP to 0.1
"of 20.20%, to 0.2" of 19.95%. Of course it meets the required specifications of the
road subgrade strength (requirements for CBR values> 6%).