Page 97 - 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
1.2 Compaction Test
The purpose of this test is to obtain the optimum moisture content and
maximum density. Compaction was carried out using a soil sample
that had been dried and filtered through a No.4 sieve, then determined
the variation of water content for each soil sample with the addition of
± 2% water.
1.3 CBR (California Bearing Ratio) Test
CBR testing aims to determine the CBR value of soil and aggregate
mixture in the laboratory at a certain water content. Through this test,
it can be known whether the peat soil meets the specifications to be
used as the basis of a structure. The CBR values for the road
subgrade criteria can be seen in Table. 4 and Table. 5.

Table 4. CBR Classification according to Bowles, 1992.
CBR (%) Grade Used
0-3 Very Poor Sub-grade
3-7 Poor to fair Sub-grade
7-20 Fair Sub-base
20-50 Good Bae of sub-base
>50 Excellent Base
Table 5. CBR Classification according to Bina Marga, 2012.
Section Grade CBR (%)
very good 20-30
good 10-20
Subgrade
currently 5-10
bad <5
3 RESULTS
The purpose of testing the physical properties of the soil is to
determine the characteristics of the peat soil being tested. While
testing the mechanical properties of the California Bearing Ratio
(CBR) test to determine the value of the bearing capacity of the soil by
determining the ratio of piston penetration.

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