Page 99 - 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
From the Figure. 1, can be determined that the optimum moisture
content (wopt) = 29.41% and the maximum dry weight (γd maks) = 0.628
gr/cm . So, for the CBR test, 1000 ml of water can be added.
3
0.8
dry density (gr/cm3) 0.6

0.4
0.2
0
30 40 50 60 70
Water content (%)

Figure 2. Peat Soil Compaction Curve, East Pedamaran District
From the Figure. 2, the maximum dry weight (γd maks) = 0.30 g/cm³ and
the optimum water content (wopt) = 42.86%. From the results of the
Compaction test graph above, it shows that the addition of water is in
600 ml, so for the CBR test, the addition of water is doubled from 600
ml, which is 1200 ml. Sapric peat because it has a fiber content of
<33%.

3.3 CBR Test
After the compaction test was carried out, it was continued with the
CBR unsoaked test. Peat soil samples that passed filter no.4 were
mixed with 1000 ml of water for peat soil in Tulung Selapan District
and 1200 ml of water for peat soil in East Pedamaran District. The
curing process is then carried out for 24 hours. The CBR test uses 3
molds of peat soil samples at one location. Every mold (has 5 layers
of soil each, with 56 collisions. The test used is an automatic CBR Test
which is carried out with a penetration dial reading of 0.1 "and 0.2".

3.4 Peat Soil from Tulung Selapan District
The results of the California Bearing Ratio test of peat soil in Tulung
Selapan District with 3 samples. Obtained CBR value as in Table. 7.

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