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Comparison Study Of Determination Of Field Cbr Values With Angkur And Dcp Equipment In Road Subgrade For Surabaya Road Development Planning Berlian Farahdiza Hertanti; Agus Tugas Sudjianto; Aji Suraji; Candra Aditya
Asian Journal Science and Engineering Vol. 5 No. 1 (2026): Asian Journal Science and Engineering
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51278/ajse.v5i1.1985

Abstract

This study aims to evaluate the carrying capacity of the subgrade in the construction of road pavement by comparing the value of the California Bearing Ratio (CBR) of the field obtained from the CBR Angkur and Dynamic Cone Penetrometer (DCP) test. The quality of the subgrade is a crucial factor in determining stability and age of road pavement service, but often there are significant variations in the results of testing the carrying capacity of the soil between different methods. This study was conducted on Jl. Baruk Utara III, Kedung Baruk, Rungkut District, Surabaya, by collecting primary data from testing the physical and mechanical properties of the soil in the laboratory, as well as the CBR Angkur and DCP testing in the field. The results showed that the soil at the study site was classified as silt (OL) and A-4, with high water content (59.14%) and low plasticity, indicating weak carrying capacity. The CBR value of the field of the Angkur test is 2.53%, while the CBR design value of the DCP test ranges from 3.13%. Although there are numerical differences, the two methods consistently show that the subgrade has a low carrying capacity. This conclusion confirms the need for soil stabilization to ensure optimal and sustainable pavement performance.
Analysis Of Subgrade Repair Using Lime By Modeling In The Field For Design Of The Foundation Foundation Of The Rigid Pavement Micro Pole Moch. Fajar Rahmadhoni; Agus Tugas Sudjianto; Aji Suraji; Muhamad Cakrawala
Asian Journal Science and Engineering Vol. 5 No. 1 (2026): Asian Journal Science and Engineering
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51278/ajse.v5i1.1986

Abstract

The subgrade is an important component in the road pavement structure because it functions as the main lining of the traffic load. However, the condition of the land on Jl. North Baruk III, Kedung Baruk, Surabaya, tends to be less stable because it is dominated by soil types such as soft sauce, plastic clay, and loose -grained soils that have low carrying capacity. This study aims to evaluate subgrade improvement using chemical stabilization methods with a mixture of dolomite lime of 6%, as well as analyzing its impact on the value of density, CBR, and carrying capacity of micro pole foundations. The method used is laboratory experiments and field modeling. The results showed that the addition of lime 6% increased the value of soil density from 95.84% to 99.70% (an increase of 4.03%), the CBR value from 2.53% to 4.09% (an increase of 61.66%), and the carrying capacity of the foundation of micro pole from 27.84 kN to 38.66 KN (increased 38.87%). Thus, the combination of lime stabilization and the utilization of micro pole effectively increases the carrying capacity and stability of the subgrade to support the rigid pavement construction.