Page 94 - Proceeding The 2nd International Seminar of Science and Technology : Accelerating Sustainable Innovation Towards Society 5.0

nd
The 2 International Seminar of Science and Technology
“Accelerating Sustainable innovation towards Society 5.0”
ISST 2022 FST UT 2022
Universitas Terbuka
test. The CBR value is used as the basis for planning the next road
embankment pavement, depending on the desired road class. The
higher the CBR value, the better the subgrade condition. If the original
soil has a low bearing capacity, the road construction will quickly
experience damage [9].
One of the parameters that becomes a benchmark in determining the
ability of the soil in making transportation facilities as roads is the
carrying capacity of the soil in the form of the CBR value. The
requirements for the bearing capacity of the soil to be categorized as
good are if the CBR value based on field testing is 3% and based on
the laboratory the value is 6%. While soils that do not meet these
requirements Peat soils tend to have low CBR values ranging from
2.595% - 5.709% [10]. The CBR value can be increased by
compaction, which in practice will refer to the optimum moisture
content and maximum dry density. However, if the CBR value does
not meet the required carrying capacity, after a laboratory compaction
test using the standard proctor method is carried out on the original
soil, it is necessary to mix or replace it with soil with a better CBR value
[11].
California Bearing Ratio According to SNI 1744-2012 is the ratio
between the penetration load of a type of material and the standard
load at the same penetration depth and speed. California Bearing
Ratio is a comparison between the test load and standard load with
the same depth and speed of penetration and is expressed as a
percentage, and the purpose of the CBR experiment is to determine
the value of the bearing capacity of the soil in maximum density. As
well as CBR testing is used to evaluate the potential strength of
subgrade materials, sub-bases and foundations, including materials
that are recycled for road and airfield pavements.
Laboratory CBR testing is carried out on several specimens, generally
depending on the moisture content of compaction and the dry density
to be achieved. In general, the laboratory CBR testing (according to
the stages) includes the preparation of equipment, material samples
and test samples, compaction, determination of the wet mass and

ISST 2022 – FST Universitas Terbuka, Indonesia 73
International Seminar of Science and Technology “Accelerating Sustainable
Towards Society 5.0