Effect of Lime Stabilization on Vertical Deformation of Laterite Halmahera Soil

International audienceIn this paper, the study was conducted to determine the lime effect on verticaldeformation of road base physical model of laterite Halmahera soil. The samples of laterite soilwere obtained from Halmahera Island, North Maluku Province, Indonesia. Soil characteristicswere obtained from laboratory testing, according to American Standard for Testing and Materials(ASTM), consists of physical, mechanical, minerals, and chemical. The base layer of physicalmodel testing with the dimension; 2m of length, 2m of width, and 1.5m of height. The additionof lime with variations of 3, 5, 7, an 10%, based on maximum dry density of standard Proctortest results and cured for 28 days. The model of lime treated laterite Halmahera soil with 0,1mthickness placed on subgrade layer with 1,5m thickness. Furthermore, the physical model wasgiven static vertical loading. Some dial gauge is placed on the lime treated soil surface withdistance interval 20cm, to read the vertical deformation that occurs during loading. Theexperimentals data was analyzed and validated with numerical analysis using finite elementmethod. The results showed that the vertical deformation reduced significantly on 10% limecontent (three times less than untreated soil), and qualify for maximum deflection (standardrequirement L/240) on 7-10% lime content

MECHANICAL CHARACTERISTIC OF FERRO LATERITE SOIL WITH CEMENT STABILIZATION AS A SUBGRADE MATERIAL

International audienceThis study aimed to determine and evaluated the mechanical characteristic of the potential ferro laterite soil with cement stabilization to be used as base material. Ferro laterite soil obtained from three different sampling sites at the East Halmahera Regency. The sampling process of conventional excavation on the surface, soil sample is inserted into the sample bag and labeling as LH1 for first location, LH2 for the second location, and LH3 for a third location. Furthermore, soil prepared for testing the physical properties. The sampling results were tested for physical properties of the soil according to ASTM and SNI standardization, involved testing; moisture content, particle size distribution, specific gravity, and the limits of Atterberg, as well as compaction test. Making of the soil test specimen is done by mixing the ferro laterite soil with the addition of cement in a composition of 3%, 5%, 7%, and 10% on the initial condition of maximum density and optimum moisture content standard Proctor test results. Cylindrical test specimen with dimensions H = 2D, then cured for 3, 7, 14, and 28 days before being tested for soil compressive strength with UCS testing. The test results showed that the ferro laterite soil stabilization with cement increases the compressive strength for the three types of ferro laterite soil that is significantly until the curing time of 28 days (73-357 kPa, 79-588 kPa, 62-450 kPa, respectively for LH1, LH2 and LH3), resulting with an increase in the percentage of cement addition. Based on these test results, the ferro laterite soil has the potential to be used as road base material and construction material, but it is necessary to test in detail the physical model (prototype) prior to implementation in the field

STRENGTH CHARACTERISTIC OF FERRO LATERITE SOIL WITH LIME STABILIZATION AS SUBGRADE MATERIAL

International audienceThis study aimed to determine and evaluate the strength characteristics of ferro laterite soil with lime stabilization on a particular mixture composition. Ferro laterite soil obtained from three different locations with conventional sampling process at 0-1 meters of depth, wrapped in the sample bag and labeled according to the location, namely LH1 for the Subaim location, LH2 for Buli location, and LH3 for Maba location. The sampling results were tested for physical properties of the soil according to ASTM and SNI standardization, involved testing; moisture content, particle size distribution, specific gravity, and the limits of Atterberg, as well as compaction test. Making of the soil test specimen is done by mixing the ferro laterite soil with the addition of lime in a composition of 3%, 5%, 7%, and 10% on the initial condition of maximum density and optimum moisture content standard Proctor test results. Cylindrical test specimen with dimensions H = 2D, then cured for 3, 7, 14, and 28 days before being tested for soil compressive strength with UCS testing. The test results showed that the ferro laterite soil stabilization with lime increases the compressive strength for the three types of ferro laterite soil that is significantly until the curing time of 28 days (72-254 kPa, 156-291 kPa, 80-272 kPa, respectively for LH1, LH2 and LH3), resulting with an increase in the percentage of lime addition. Similarly, the increase in curing time up to 28 days, resulting in an increase of soil compressive strength, in which the bond between grains of soil with lime increasingly stable. Based on these test results, the ferro laterite soil has the potential to be used as road base material and construction material, but it is necessary to test in detail the physical model (prototype) prior to implementation in the field

Study on Characteristic of Laterite Soil with Lime Stabilization as a Road Foundation

<p>Regional growth and development led to an increase in infrastructure especially roads. Along with that, material requirements as the road foundation also increased. Meanwhile, the number of qualified materials in certain areas is limited, difficult to obtain and expensive. Therefore, efforts are required to exploit the potential of local soils as a<br> qualified road foundation material. One of them is laterite soil which is only wasted from mining activities. This study aims to analyze and produce the characteristics of laterite soil with lime stabilization to be used as a road foundation. Physical and mechanical properties, mineral content, and chemical composition, obtained from laboratory testing. Meanwhile, to obtain soil bearing capacity, the physical model of the road foundation was examined. The addition of lime with compositions of 3, 5, 7, and 10% at maximum dry density from Proctor standard test, then cured to 3, 7, 14, and 28 days before testing. Subsequently, the soil mixture is fed into the test tub with length (L) = 8m, width (W) = 2m, and height (H) = 2.5m. The physical model of road foundation consists of a subgrade soil with 1.5 m thickness and above the subgrade is placed lime treated base with 0.1 m thickness. Dial gauge to read the magnitute of vertical deformation occurs when loading is placed on surface with 0.2 m distance. Furthermore, static loading test on each mixture of lime treated base. The results show that, stabilization of 10% lime for 28 days curing time yields the strength and bearing capacity of the soil three times higher than soil before stabilization. Subgrade modulus increased significantly with increasing of lime content and curing time. Comparing the relation of subgrade modulus and CBR values for common soil and sediment soil with cement stabilization, it was found that performance of laterite soil with lime stabilization is better than sediment soil with cement stabilization and approaching of common soil. It is concluded that laterite soil with lime stabilization has potential as a road foundation.</p

Maladministration in Licensing Service: A study at the Office of One Mop Integrated Services and Investment, Ternate City

The government has consistently endeavored to enhance community welfare by improving public services, empowering communities, and fostering increased community participation. In this new service paradigm, the public is regarded as the service user, while the government assumes the role of the service provider. This study seeks to gain insights into the public’s perceptions of the licensing service process at the Office of One Stop Integrated Services and Investment in Ternate City. This research takes a qualitative approach, focusing on comprehending the socially constructed nature of reality. Specifically, it aims to address how social experiences are shaped and given meaning. This understanding is rooted in the belief that humans are symbolic beings who actively seek meaning in their lives. The findings of this study reveal that the public still expresses grievances and disappointments concerning the standard service procedures presented by service officers, particularly in terms of providing information on all types of services to the community. Furthermore, certain costs must be incurred by business operators due to incomplete submitted files, which result in further delays in processing. Additionally, the extended processing time (ranging from 7 to 30 days) for licensing services by officers can lead to additional costs borne by society. Keywords: maladministration, One Stop Service, licensing servic

Bearing capacity characteristic of subgrade layer quicklime treated laterite soil

This study aimed to analyze bearing capacity characteristics of laterite soil with quicklime stabilization as road subgrade layer. The laterite soil obtained from three different locations with three different ferrous (FeO) content. Soil samples were conduct by mixing laterite soil with 3%, 5%, 7%, and 10% lime content on Proctor initial condition, then cured for 3, 14, and 28 days before tested for soil bearing capacity using CBR laboratory test. Result showed that the lime treated laterite soil increases the bearing capacity for all types of laterite soil significantly in line with incrasing of lime content on 28 days curing time (11,67% to 51,67%, 14% to 53,33%, and 14,17% to 71,67%, respectively for LH1, LH2 and LH3). The increasing of soil bearing capacity due to pozzolanic strength gain. Based on these results, the laterite soil has potentially to be used as road subgrade layer

Bearing capacity characteristic of subgrade layer quicklime treated laterite soil

This study aimed to analyze bearing capacity characteristics of laterite soil with quicklime stabilization as road subgrade layer. The laterite soil obtained from three different locations with three different ferrous (FeO) content. Soil samples were conduct by mixing laterite soil with 3%, 5%, 7%, and 10% lime content on Proctor initial condition, then cured for 3, 14, and 28 days before tested for soil bearing capacity using CBR laboratory test. Result showed that the lime treated laterite soil increases the bearing capacity for all types of laterite soil significantly in line with incrasing of lime content on 28 days curing time (11,67% to 51,67%, 14% to 53,33%, and 14,17% to 71,67%, respectively for LH1, LH2 and LH3). The increasing of soil bearing capacity due to pozzolanic strength gain. Based on these results, the laterite soil has potentially to be used as road subgrade layer