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Evi Aprianti
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International Association of Lowland Technology In Collaboration with Hasanuddin University and Saga University Address Faculty of Engineering, Center of Technology Building, 1st Floor Jalan Poros Malino km. 6, Bontomarannu, Gowa Indonesia Postal Code: 91711
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Lowland Technology International
Published by International Association of Lowland Technology
ISSN : 13449656     EISSN : 21878870     DOI : https://doi.org/10.0001/ialt_lti
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
The Lowland Technology International Journal presents activity and research developments in Geotechnical Engineering, Water Resources Engineering, Structural Engineering, Transportation Engineering, Urban Planning, Coastal Engineering, Disaster Prevention and Mitigation Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 463 Documents
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Maximum Tension Lines of MSE Embankments with Polymer and Metallic Reinforcements on Different Foundations Types a Dennes T. Bergado; Salisa Chaiyaput; Ray M. Basilio; Ochakkraphat Sukchaisit; Takenori Hino
Lowland Technology International Vol 23 No 3 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i3.999

Abstract

Four full scale and fully instrumented mechanically stabilized earth (MSE) test embankments were constructed to 6 m high for analyses and comparison of their behaviour, namely: one on hard ground, one on DCM improved ground and two on soft ground. The MSE on hard ground was reinforced with strong polymer geogrid in one side as well as metallic grids and strips in the other side. The MSE on improved ground was reinforced with hexagonal grids. Due to the negligible vertical and lateral movements in hard and improved ground, the consequent maximum tension lines were observed to closely follow the bilinear Coherent Gravity Method with standard distance from the facing of 0.3H where H is the equivalent height of the reinforced embankment. Moreover, two fully instrumented MSE were constructed on soft ground having similar trapezoidal cross-sections. One embankment was reinforced with polymer geogrids and the other with steel grids. The resulting large vertical and lateral movements of both embankments have almost identical patterns. The maximum tension lines of both embankments closely resemble to that of Coherent Gravity Method but with location of the vertical line portion at closer distances of 0.1H to 0.2H from the embankment facing.
The Analysis of Strength of Cement Fiber Pipes with The Utilization of Economic Mixed Fiber as a Mixed Material Heri Sujatmiko
Lowland Technology International Vol 23 No 3 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i3.1017

Abstract

Water is one of the main factors in human life. This fact brings us to the problem that often occurs, namely the use of low-quality water for the purpose of washing, bathing, cooking and drinking. The characteristics of such water in general, among others, the water is cloudy or dull, sometimes somewhat smelling rust and rancid, if exposed to sunlight for a long time, changes color to brownish black. In addition to feeling less comfortable, if this water is used to wash it will give a yellow stain on the clothes. A healthy way is to use a pipe or closed channel. Commonly used water lines are using bamboo pipes, which are rather expensive are PVC pipes and iron pipes. Especially if you use a large pipe size and for long distances, the required costs will be expensive. For rural areas, of course the problem of the availability of costs also needs attention. By paying attention to the things mentioned above, we will develop a method of making pipes that are simple, using materials that are easily available, and more importantly can be made alone, namely pipes with a mixture of palm fiber and cement. With the use of cement fibers, it is intended to apply the operational process to water with good quality.
Prediction of Ultimate Lateral Capacity of Rigid Spiral Pile under Static Loading in Cohesionless soil Amarbayar Jugdernamjil; Noriyuki Yasufuku; Adel Alowaisy
Lowland Technology International Vol 23 No 3 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i3.1074

Abstract

1g model test is carried out to evaluate the ultimate lateral capacity of the spiral model pile in dense and medium dense cohesionless soil. The spiral model pile is scaled down using a proper similarity equation considering the equivalent second moment of area. The equivalent second moment of the area was obtained from a four-point bending test on a flat bar and compared with a spiral bar. In order to identify the lateral capacity of the spiral model pile, the conventional pipe and flat bar model piles were conducted as well. Winkler's model was adopted to predict the rigid spiral pile's ultimate lateral capacity in cohesionless soil. A simplified model is proposed by developing ultimate lateral soil pressure. The novel shape factor for spiral was obtained for the evaluation of ultimate lateral soil pressure by considering the projected area of the pile. The projected area of the spiral pile was compared with the pipe pile. The comparison study was conducted to spiral, flat, bar, and pipe pile, respectively, for inspecting accuracy. Among the comparison, the proposed model was indicated as a more accurate model than others. The spiral pile was shown a similar performance with a flat bar in both the empirical and the experimental results.
Profile of Safety Factor (SF) Potential Liquifaction based on CPT Data using GIS & Surfer Applications Poppy Maghfirah
Lowland Technology International Vol 23 No 3 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i3.1194

Abstract

Earthquakes can cause damage to the structure of the soil layer, one type of hazard resulting from an earthquake is liquefaction. Liquefaction is an event where the loose sand soil layer experiences a drastic loss of shear strength due to increased pore water pressure as a result of the occurrence of cyclic stresses in very fast soil vibrations in a short time. This liquefaction potential can be analyzed using Cone Penetration Test (CPT) data by considering the value of earthquake acceleration (pga). This study aims to analyze soil conditions in the event of potential liquefaction using CPT (Cone Penetration Test) data through GIS and Surfer applications, computer applications which serves to analyze and create distribution contours from coordinate data and output data from CPT.
Study on the Correlation of CPT value to Soil Parameters Abigail Anggie Putriana Onggosandojo; Tri Harianto; Sitti Hijraini Nur
Lowland Technology International Vol 23 No 3 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i3.1243

Abstract

Soil is one of the factors that has the most important role because it bears the burden of all the constructions that stand on it. Based on this very important role of soil, prior to the start of construction in a location, a soil investigation must be carried out first to find out the condition of the subgrade at the construction site. One of the most frequently used soil investigation methods is Cone Penetration Test (CPT). The purpose of this study includes two things, namely to determine the soil profile at the CPT test location, and to determine the correlation between the data from the Cone Penetration Test results with soil parameters (Soil Volume Weight, Cohesion, and Internal Shear Angle). The method used in this study is to analyze the data from the Cone Penetration Test using the results of the research that has been carried out as a basis for determining the soil profile and the required soil parameters. The results obtained are, the first is based on the data plot on the soil type graph at the Cone Penetration Test (CPT) test location spread over 4 zones, namely Zone 3, Zone 4, Zone 5, and Zone 6. The second is the correlation between soil unit weight and Conus Resistance values are directly proportional, as are Cohesion and friction angles. In addition, the equations used in this paper cannot be used as the main reference, but only used to predict soil parameters when in the field
A Material Flow Analysis in An Integrated Catfish Farming System in Mekong Delta, Vietnam Tra Thi Hieu; Tra Van Tung; Nguyen Thi Phuong Thao; Le Quoc Vi; Nguyen Hong Anh Thu; Nguyen Viet Thang; Tran Trung Kien; Le Thanh Hai
Lowland Technology International Vol 23 No 4 (2022): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i4.1119

Abstract

The purpose of this study is to conduct the material flow accounting (MFA) in the integrated catfish breeding system with purpose to evaluate the pollution reduction and the economic benefits gained from the system. An amount of 21.17% of water is evaporated into the air, 4.73% is accumulated in the compost and biomass of cultivation plants, and the larger part of 74.1% after being treated by using aquatic plant flowing in the water ponds is discharged into receiving canal. The pond bottom sludge after being mixed with other organic components in the system is used as compost for fertilizing the cultivation plants. The organic matters accumulated in cultivation plants and soil are 1.95% and 9.6% respectively, and the remaining amount is accumulated in the compost. A larger scale system is recommended for 9 catfish breeding families in the area. However, the wastewater generated from these 9 households is not totally reused for watering purpose due to the limited cultivation land area at these households, thus another households in the neighboring area need to be included in the system in order to form more effective integrated aquaculture system leading to pollution reduction and sustainable livelihood for the local farmers.
Experimental Analysis of Recycled Concrete Microstructure Using Natural Aggregate Replacement Materials Nur Ainun Hafifah; Muhammad Irsan; Muhammad Yusril Raynonto; Asri Mulya Setiawan
Lowland Technology International Vol 23 No 4 (2022): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i4.1127

Abstract

Solid waste from construction residues can be used as a material for economic value recycled agregate concrete.The use of concrete waste as a substitute for coarse aggregate is expected to be able to overcome problems in environmental pollution.The addition of a superplasticizer to fresh concrete mixtures can increase the strength of the concrete produced with a small amount of water. This study aims to to determine the morphological composition of the recycled concrete microstructure by SEM testing and to determine the effect of natural aggregate substitute materials on the mechanical properties of recycled concrete. Variations of concrete waste used are 0%, 50% and 100%. The compressive strength and flexural strength test was carried out at 28 days of concrete. The test results show that the value of compressive strength of concrete is 43,52 Mpa at the variation of 100% concrete waste. Aluminum (Al2O3), Sulfur Trioxide (SO3), Phosphorus (P2O5) and Lime (CaO) are the most dominant elements in the hydration process of concrete.
Identification of the Implementation Level of the Covid-19 Protocol in Service Providers Building (Case Study of Palu City Area) Andi Asnudin; Anisa Dwi Syafira
Lowland Technology International Vol 23 No 4 (2022): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i4.1152

Abstract

ABSTRACT Construction projects themselves are one of the aspects affected by Covid-19. Therefore, a rule is required to be used as a protocol in the implementation of work in the field of construction which in this case is the Instruction of the Minister of PUPR No.2 of 2020. This study aims to find out the level of Implementation of Covid Protocol in Construction Service Providers that located in Palu city . Technical research uses questionnaires based on samples from several contractors who are running projects in Palu City. Questionnaires that have been distributed are then analyzed using percentage and RRI methods. The results showed that the level of implementation of the Covid-19 protocol on construction projects based on sub indicators with the application rate is "Highly Applied" and the highest RRI value is 0.870 to the lowest RRI value of 0.711. Some of these indicators are (1) Allocating costs for cleaning facilities (0.870), (2) Dividing work locations by type of work (0.863), (3) Preparing facilities and infrastructure for washing hands, keeping distance, and avoiding crowds for employees (0.859), ( 4) Provide hand washing facilities with soap, disinfectant, hand sanitizer, tissue, and masks in the office and project field. (0.859), (5) Forbidding someone who is sick with an indication of a temperature > 38 degrees Celsius to go to the project site (0.856), (6) Establishing a Covid Prevention Task Force (0.856), (7) Reporting to PPK if positive workers are found and/Patients Under Supervision (PDP), and provide advice to temporarily suspend project activities (0.852), (8) Conduct socialization and education on the Covid protocol (0.844), (9) Conduct socialization related to the Covid 19 prevention protocol in construction projects (0.833) , and (10) Implementing regulations related to Covid prevention protocols on construction projects (0.833)
Slope Reinforcement using X Type Block in Precipitation Ignatius Evan Yesa; Tri Harianto; Ariningsih Suprapti
Lowland Technology International Vol 23 No 4 (2022): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v23i4.1376

Abstract

This study was applied research by using experimental method to determine the effectiveness of slope type reinforcement block X on slopes with rainfall (precipitation). The output data of was the amount of deformation on the slopes and the ratio of the deformation of slope reinforcement. Based on the results of the study, the slopes loaded without reinforced with block X with the provision of rainfall experienced a collapse in 28 minutes. The deformations occurred just before the failure occurred were vertical deformation of 8 mm and horizontal deformation of 10 mm. Afterwards, the slopes with block X type 1 reinforcement after being loaded for 24 hours, has remained no collapse. The deformations occurred are (1) vertical deformation of 8 mm and (2) 10 mm of horizontal deformation
Optimisation of the Geotechnical Properties of Spent Ore for Road Construction in Ghana Michael Affam; Bernard Ofosu
Lowland Technology International Vol 24 No 1 (2022): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v24i1.1361

Abstract

Mining operations generate large volume of wastes and due to its potential toxic nature, it is managed in accordance to very strict environmental regulations in Ghana. The spent ore can be reutilized as a construction material especially for road, however, due to its granular nature, it is not possible to compact the materials to achieve the required strength for engineering purposes. Laterite which is abundantly found in Ghana was used to improve the engineering properties of spent ore for road base and subbase construction. The laterite was added to the spent ore in range of 10% to 50% to form composites. Physical and engineering laboratory tests including moisture content, Atterberg Limits, compaction and Californian Bearing Ratio were conducted on the composites in accordance with British Standards. The results show that the Liquid Limit of the composites are between 18.7% and 30%, the Plasticity Index are between 1.3% and 11.3%. The soaked CBR values are between 32% and 62%, the unsoaked values are between 31% and 64%. The results show that, 30% addition of the laterite will improve the spent ore for only subbase construction based on Ghana Highway Authority standards for base and subbase materials in Ghana.

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