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All Journal Journal of Infrastructure and Facility Asset Management
Putra, Yanuar Dwi
The National Road Construction Agency (BBPJN) for Central Java – Special Region of Yogyakarta, Directorate General of Highways, Ministry of Public Work and Housing (PUPR), Semarang, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Library & Information Science Mathematics Transportation

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Subgrade Stabilization with Ca (OH)2 Lime to Improve the Physical and Mechanical Properties of Soil (Case Study: The National Road Trengguli – Bts. Kab. Demak/Kudus) Rangkuti, Rahmadsyah; Soemitro, Ria Asih Aryani; Warnana, Dwa Desa; Satrya, Trihanyndio Rendy; Putra, Yanuar Dwi
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 1 : Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v6i0.19894

Abstract

Road damage on The National Road Trengguli - Bts. Kab. Demak/Kudus in the form of cracks and collapses, the contributing factors are soft subgrade conditions and irrigations on both sides of the road. Chemical stabilization with Ca(OH)2 lime can improve the physical and mechanical properties of the soil. This research uses the addition of lime with variations of 2%, 4%, 6%, 7%, 8%, and 10% of the dry weight of the soil. Based on the standard proctor test results, the optimum mixture of 6% lime was obtained with a value of γdmax = 1.459 gr/cm3 and Wopt = 28.052%. Furthermore, the original soil and 6% lime mixture were tested: sieve and hydrometer analysis, Atterberg limits, standard proctor compaction, unconfined compressive strength (UCS), laboratory CBR (soaked) and 1 cycle drying - wetting testing. At 6% lime for UCS and CBR testing, 0, 7 and 14 days of curing were conducted. The results of research on the initial soil and after 6% lime stabilization, namely the soil classification based on USCS originally included in CH, namely non-organic loamy soil with high plasticity or fat clays to SM, namely silty sand and based on AASHTO originally included in A-7-6 clay soil to A-7-5 clay soil, from PI = 43.232% to PI = 16.213%, from CBR = 0.917% to CBR with 0, 7, and 14 days of curing are 11.463%, 14.266%, and 19.408%, from qu = 0.967 kg/cm2 to qu with 0, 7, and 14 days of curing are 2.973 kg/cm2, 9.546 kg/cm2 and 12.206 kg/cm2. After 1 cycle drying - wetting test, there is a decrease in qu value, namely in the initial soil of 93.004% and 6% lime stabilized soil of 73.040%.
The Impact of Coal Combustion Waste (Fly Ash and Bottom Ash) on The Properties of Clay Soil (Case Study: National Road Section Demak – Kudus, Indonesia) Nurtaqwim, Alien Maulida; Soemitro, Ria Asih Aryani; Warnana, Dwa Desa; Satrya, Trihanyndio Rendy; Putra, Yanuar Dwi
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 1 : Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v6i0.19936

Abstract

The National Road Section Demak - Kudus is one of the most populous road sections connecting East Java province with West Java province through the city of Semarang. Repeated damage conditions raise the suspicion that the subgrade under the road body has special criteria that need further handling before repairs are made to the pavement. In addition, based on the soft soil distribution map and soil data with the results of existing laboratory testing, categorized as soft soil. For this reason, it is necessary to handle the subgrade to improve soil parameters, which is physical and mechanical. Therefore, chemical stabilization was chosen to obtain a chemical reaction from the soil. The selected chemicals to induce these reactions is coal combustion waste which are fly ash and bottom ash. Exhibiting pozzolanic properties that can react and cause flocculation in the soil. The research involves mixing the soil with stabilizing materials in three different combinations: first, soil mixed by fly ash (FA); second, soil mixed by bottom ash (BA); and third, soil mixed by both fly ash with bottom ash (FABA), optimum stabilizing mixture material at 20%. The initial soil, which is highly plastic clay with a classification of CH/A-7-6, having a plasticity index (PI) of 43.23% and California Bearing Ratio (CBR) of 0.92%, undergoes improvement with adding FA stabilizer, resulting in MH/A-7-5 with a PI of 27.07% and CBR of 12.39%. The mixture of soil with FABA is MH/A-7-5 with a PI of 28.87% and CBR of 9.60%. However, the improvement in the mixture of soil with BA is not as significant, remaining in the CH/A-7-6 category with a PI of 31.83% and CBR of 3.00%.
Analysis of Main Road Stability Due to The Effect of River Water Level Fluctuations and Rainfall (Case Study: Trengguli - Kudus Road Section) Wijaya Kusuma, Akhdiat Fajar; Soemitro, Ria Asih Aryani; Warnana, Dwa Desa; Satrya, Trihandyo Rendy; Putra, Yanuar Dwi
Journal of Infrastructure & Facility Asset Management Vol 6, No 1 (2024): Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v6i1.19888

Abstract

In Indonesia, many roads are built next to rivers due to several factors in terms of geography, topography, and function of the river. One of them is on the Trengguli - Kudus road where the road is flanked by two rivers. These road sections often experience damage in the form of cracks, potholes, and differential settlement. The existence of a river on the side of the road needs to be considered the possibility of the influence of changes in the river water level on the stability of the road. Rainfall also has a significant role in the stability of the main road considering that the rain that occurs is very intense, moreover, the road is already in cracked condition. This research was carried out numerically using the Plaxis program, with variations in river water level and rainfall adjusted to field conditions. The research results show that a rapid drawdown causes a significant decrease in the safety factor (SF=1.172). Even though the influence of rainfall is relatively small, it still reduces the safety factor (SF=1.152). The duration of the rapid drawdown only has a difference of <1.35%. However, the slope conditions are still within safe limits.
Co-Authors Nurtaqwim, Alien Maulida Rangkuti, Rahmadsyah Satrya, Trihandyo Rendy Satrya, Trihanyndio Rendy Satrya, Trihanyndio Rendy Soemitro, Ria Asih Aryani Soemitro, Ria Asih Aryani Warnana, Dwa Desa Wijaya Kusuma, Akhdiat Fajar