Comparison of Field and Laboratory Soil Stability Values on the Soko - Tuban Road

Mohammad Zainul Ikhwan (Universitas Bojonegoro, Bojonegoro, Jawa Timur, 71088)
Toni Budi Santoso (Universitas Bojonegoro, Bojonegoro, Jawa Timur, 71088)

Electronic Journal of Education, Social Economics and Technology
Vol 6, No 1 (2025)

The good Soko-Tuban road experienced damage that distrupted comfort. The results showed that the test soil included organic clay with an average density of 2.33 gr/cm³ and a water ontent of 43.19%. The liquid limit value was 77.33%, the plastic limit was 32.7%, and the plasticity index was 44.63%. DCP testing was carried out on two samples with different road conditions, namely at STA 7+100 and 7+200 (good road) and STA 7+800 and 7+900 (damaged road). The CBR value at STA 7+100 on the east side was 12.09% and 7+200 on the west side was 9.87%. At STA 7+800, the CBR value on the east side was 5.23% and STA 7+900 on the west side was 10.59%. The laboratory CBR value was taken from two samples with three variations of impacts 10x, 30x, and 65x. In good road conditions at STA 7+100 the highest average CBR value is 17.12%. In damaged road conditions at STA 7+800 the average CBR value is 11.52%. The significant difference in laboratory and field CBR values is influenced by road conditions and soil characteristics.