cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Evi Aprianti
Contact Email
eviaprianti93@yahoo.com
Phone
+6282387555381
Journal Mail Official
ialt_lti@unhas.ac.id
Editorial Address
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
Location
Unknown,
Unknown
INDONESIA
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
 42   43   44   45   46 
Strength Behavior of Soil Cement Mixtures with and without Fly Ash for Can Tho Soft Soil LE GIA LAM
Lowland Technology International Vol 23 No 1 (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.v23i1.857

Abstract

This paper investigates strength of Can Tho soft soil mixed with cement and effect of the incorporation fly ash ratio on strength the mixed soil. The strength in terms of unconfined compressive strength of the mixtures was determined in the laboratory and used to evaluate strength of the soil cement mixing. The soil was blended with cement at proportion from 100 to 500 kg cement per cubic meter of soil to test the strength of the mixtures and propose a proper amount of cement for soil cement mixing. In addition, a number of tests was conducted for the soil mixed with different ratios from 10% to 50% of fly ash to cement to seek for suitable replacement of fly ash to cement and strength of soil mixed with cement and fly ash. As a result, the study shows that the strength of Can Tho soft soil improved with cement can reach above 1000 kPa when it mixed from at least 300 kg cement for a cubic meter of soil. When fly ash is incorporated, if the ratio of fly and cement is less than or equal 20%, the strength of the soil mixing is change not much and the replacement of cement by fly ash is suggested to limit to 20% to reach the strength nearly 1000 kPa. Additionally, the axial strain of cement-treated soil specimens with and without fly ash reduces very significantly to just under 2.5% compared to above 14% that of natural soil specimens.
Study on bearing capacity of reinforced concrete beams strengthened with carbon fiber reinforced polymer sheet Jie Li
Lowland Technology International Vol 23 No 1 (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.v23i1.861

Abstract

In this study, the strengthening effect of the carbon fiber reinforced polymer (CFRP) sheet was studied. Four groups of specimens were designed, each of which has three specimens. The specimens were strengthened with 0 layer of CFRP sheet, one layer of CFRP sheet, two layers of CFRP sheet, and three layers of CFRP sheet, respectively. An experiment was carried out through the third-point loading method. Compared with the unreinforced reinforced concrete (RC) beams, the load of the beams strengthened with CFRP sheet significantly increased. Taking the ultimate load as an example, compared with the RC beams, the RC beams strengthened with one, two and three layers of CFRP sheet increased by 7%, 19%, and 23%, respectively; under the same load level, the mid-span deflection of the beam reduced, and the anti-deformation ability significantly improved. The experimental results show that the CFRP sheet can improve the bearing capacity of beams and can be further applied in practical engineering.
Land Surface Displacement in Bangkok, Thailand Inferred from Stanford Method for Persistent Scatterers Anuphao Aobpaet
Lowland Technology International Vol 23 No 1 (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.v23i1.881

Abstract

The Interferometric Synthetic Aperture Radar (InSAR) has come into play an important role as a useful tool in the situation of land subsidence monitoring in Thailand. We conduct research studies on the subsidence of Bangkok and its vicinity area using InSAR techniques. We processed 40 Radarsat-2 images from October 25, 2018, to May 25 to 2019, making the observation point at over 400,000 points, which is dense and noble to shows patterns of subsidence areas on a broad scale, with an average pixel density of 55 points per square kilometer and 100 points per square kilometer in the city. The subsidence rate of the ground ranged from -34.20 to +35.70 mm per year. The spatial data obtained from the InSAR technique is consistent and has characteristics that can effectively show the magnitude and the change in the level of groundwater content. We can conclude that the monitoring of land subsidence in Bangkok and its vicinity areas will be effective when using the InSAR technique as it can be processed throughout all seasons and allowing the leveling survey to be spaced out of time.
Potential Assessment Model of Planning, Procurement and Construction Management In Reducing Cost Inefficiency Due To Building Construction Material Waste (Case Study of SOE Contractors In Makassar City) Rusdi Latief
Lowland Technology International Vol 22 No 2 (2020): 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.v22i2, Septemb.1078

Abstract

The emergence of material wastes during the buildingconstruction is inevitable, with direct and indirect impact costs.However, this can be minimized by applying the concept ofproper management on the planning, procurement andconstruction stages. This study, therefore, aims to analyze thelevel of potential influence on the application of managementconcept to the building construction materials. The dynamicsimulation test was used to reduce the ineffective impact ofmaterial cost, reviewed by the parties involved in the project.Data were obtained by distributing questionnaires to buildingcontractors consisting of experienced and responsible workers.Furthermore, the data were analyzed and interpreted using thepath relationship concept, with the dynamic technique used todetermine the potential value of the model against timechanges. The results obtained in the Time Series Analysis arethe dynamic test of the model concept. The results of thedynamic test analysis on the model concept is simultaneouslyintegrated to the planning, procurement and constructionstages, to reduce the impact of cost inefficiency in buildingconstruction. The result also showed that there is a future74.41% decrease in the average construction waste by a stateowned contractor with the ability to optimally reduce costinefficiencies.
DECADAL CHANGE IN RIVER DYNAMICS AND LAND-USE LAND COVER PATTERN IN KALIGANDAKI RIVER VALLEY FROM 1988-2017 Suzata Karki
Lowland Technology International Vol 23 No 2 (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.v23i2.888

Abstract

Abstract The Kaligandaki basin is a snow-fed river system. It encompasses Trans-Himalayan to the Gangetic plain through Higher Himalayan, and Lesser Himalayan zones and Siwalik. This region is exposed to extensive landslides and flood hazards and are susceptible to massive land use and land cover changes every year. The present study deals with land use land cover (LULC) changes and river dynamics of the Kaligandaki river valley from Jomsom to Kusma between the years 1988-2017 using GIS as a tool. The study further focuses on change in river courses with depositional and erosional areas that further causes fluctuations to the sediment area. Decadal LANDSAT images of 30m resolution were considered for the study over 3 decades divided into five stages 1988, 1995, 2000, 2008, 2017. Radiometric correction for those images were done using QGIS, Supervised Maximum Likelihood (SML) classification into six classes viz., water bodies, forest, shrubland, agriculture and grassland, settlement, sediment and bare land, snow were applied. Analysis shows that the Kaligandaki river is a sinuous river. The bankline shift is highest (84.7109m) from 1995-2000 in the upper part of Jomsom and Lete where the width tends to fluctuate the most due to the wide floodplains and the lowest (0.20836m) from 2000 to 2008 in the lower sections where the river is more narrow. In almost three decades , water bodies in the study area has an overall decrease of 1% (15.76 km²); Forest and shrub land decreased by 5% (80.31 km²); Agriculture and grassland increased by 1% (16.22 km²); Settlement increased by 4% (67.23 km²); Sediment and bare land increased by 2% (29.42 km²) and snow cover decreased by 1% (16.81 km²). Keywords: LULC, Sinuosity, GIS, SML
An integrated geophysical study of Kraseaw Dam, Thailand NARONGCHAI WIWATTANACHANG
Lowland Technology International Vol 23 No 2 (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.v23i2.1039

Abstract

The study was conducted using seismic reflection and electrical resistivity methods including several techniques such as electrical resistivity imaging, seismic refraction and seismic reflection to determine the stability of the dam. The survey used a case study of Krasiao-Dam in Dan-Chang district Suphan-Buri Thailand. Krasiao-Dam is valid for a period of several years, suiting our study. The electrical resistivity data was processed and presented as 2D underground cross section. An integrated data analysis of these two results were verified of possible leakage position or risk location as it needed to be tested by conventional engineering testing methods. Seismic survey results indicate that the dam layers structure; which included compaction soil, is shown with the wave speed as between 400-900 m/sec, ground improved layer and bed rock has a higher signal speed of 1,000 m/sec.
Lateral displacement of boundary wall of residential building due to timber piles installation in soft ground Sailesh Shrestha; Norihiko Miura; Yuki Matsumoto
Lowland Technology International Vol 23 No 2 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Numerous investigations on piles' behavior in soft ground have been concerned with single piles' bearing capacity and settlement behavior. Relatively, little is known about the implications of installing group piles, such as the lateral displacement caused by driving piles into soft ground. The mechanism of lateral displacement of the ground and the boundary wall (BW) of residential buildings due to the timber pile installation in the soft ground was investigated by a series of three-dimensional (3D) finite element analyses and field measurements. Based on the numerical analyses, the magnitude of the lateral displacement of the ground in the construction site has been quantified at first in this paper after investigating the mechanism in terms of installation patterns, machine movement, auger drilling, type of the pile, the distance of the nearest row of the pile to the BW, and stiffness of the fill material. Then the construction methods to minimize lateral displacement of the boundary wall have been proposed in this study.
Analysis Study Proportion of Labour Wages on Road Development Project in Indonesia Rosmariani Arifuddin
Lowland Technology International Vol 23 No 2 (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.v23i2.1128

Abstract

In a construction project, determining the amount of costproportion to the resource should be precise. This researchaims to analyze the proportion of labor wages, identifying therelationship between labor wage costs to contract value andmodel the proportion of these resources so that they can beused as a reference. The research variables consist of workerswage costs (X1), the artisan's wage cost (X2), and the cost ofthe wage (X3), each determined by the proportion of the valueof the project. From the results of data collection, the proportionof the use of cost for workers is 0.27%-4.34%, the cost of thehandyman is 0.1%-1.07% and the cost for the foremanamounted to 0.1%-3.91%. Based on a simple regressionanalysis the most influential variable on the contract value isthe cost of worker’s wages with a value of R2 of 12.3%. Theresult of a regression analysis indicates that any increase inlabor cost variables will be followed by increased contractvalue. From the results of the analysis, produced amathematical model of Y = 0274 X1 + 0079 X2 + 0097 X3
Analysis Study Proportion for Need of Labour Component on Road Development Project in Indonesia R Arifuddin; A. F. C Putri; I R Rahim
Lowland Technology International Vol 23 No 2 (2021): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Infrastructure development in Indonesia continues to develop very rapidly, this development has an effect on increasing the needs of elements related to infrastructure development, one of which is manpower, need to be careful planning in the use of the number of workers according to the needs of construction activities. The research aims to model the relationship between the volume of work and the needs of workers, builders, and the number of mandors on road construction projects. The data processing on this study uses the help of Microsoft Excel programs and SPSS version 22. Data analysis techniques use simple and multiple linear regression analyses, normality tests, and correlation tests. The result of a simple regression analysis shows the influence of the number of workers, the number of foreman, and the number of successive builders of the volume of work is 15.25%, 16.31%, and 16.4%. And the results of multiple regression analysis show every improvement of the variable number of workers, the number of handyman and the number of Foreman will be followed by increased volume of work on the road construction project. Result of the results from this research can be used related government to be able to predict the number of construction workers needed to build a number of KM road.
Identification of Coastal Damage Along the Coast of Riau Muhardi Muhardi; Aminaton Marto; Manyuk Fauzi; Bambang Sujatmoko; Malik Habibillah; Mohd Syarwan
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.v23i3.909

Abstract

Riau Province has a broad coastline along its territory and it directly meeet the Malacca Strait. Costal, marine and island areas in Riau Province are currently of serious concern due to problems such as the reduction and addition of coastline (abrasion, erosion and sedimentation). This research aims to examine the extent of coastal damage that has occurred so far in reducing abrasion and priorit determination to the beach to be handled based on the level of coastal damage associated with the level of coastal importance. The areas that have the highest level of weighting (priority level A and B) are coastal areas in Bengkalis Regency (Api-api Beach, Tanjung Leban Beach, Muntai Beach and Senekip Beach), Dumai City (Purnama Beach and Bahtera Alam Beach) adn Indragiri Hilir Regency (Kuala Enok Beach). Meanwhile in Meranti Regency all the beaches reviewed have a high weighting value.

Page 44 of 47 | Total Record : 463

 42   43   44   45   46 

Filter by Year

1999 2024


Reset
Filter By Issues
All Issue Vol 24 No 4 (2024): Lowland Technology International Journal Vol 24 No 3 (2023): Lowland Technology International Journal Vol 24 No 2 (2022): Lowland Technology International Journal Vol 24 No 1 (2022): Lowland Technology International Journal Vol 23 No 4 (2022): Lowland Technology International Journal Vol 23 No 3 (2021): Lowland Technology International Journal Vol 23 No 2 (2021): Lowland Technology International Journal Vol 23 No 1 (2021): Lowland Technology International Journal Vol 22 No 4 (2021): Lowland Technology International Journal Vol 22 No 3 (2020): Lowland Technology International Journal Vol 22 No 2 (2020): Lowland Technology International Journal Vol 22 No 1 (2020): Lowland Technology International Journal - Special Issue on: Engineering Geology Vol 21 No 4, March (2020): Special Issue on: Engineering Geology and Geotechniques for Developing Co Vol 21 No 3, Dec (2019) Vol 21 No 2, Sep (2019) Vol 21 No 1, June (2019) Vol 20 No 4, March (2019): Special Issue on: Green Technology for Sustainable Infrastructure Develop Vol 20 No 3, Dec (2018) Vol 20 No 2, Sep (2018) Vol 20 No 1, June (2018) Vol 19 No 4, March (2018) Vol 19 No 3, Dec (2017) Vol 19 No 2, Sep (2017) Vol 19 No 1, June (2017) Vol 18 No 4, March (2017) Vol 18 No 3, Dec (2016) Vol 18 No 2, Sep (2016) Vol 18 No 1, June (2016) Vol 17 No 4, March (2016) Vol 17 No 3, Dec (2015) Vol 17 No 2, Sep (2015) Vol 17 No 1, June (2015) Vol 16 No 2, Dec (2014) Vol 16 No 1, June (2014) Vol 15 No 2, Dec (2013) Vol 15 No 1, June (2013) Vol 14 No 2, Dec (2012) Vol 14 No 1, June (2012) Vol 13 No 2, Dec (2011) Vol 13 No 1, June (2011) Vol 12 No 1 (2010): Vol 12 No. 1, June (2010) Vol 12 No 2, Dec (2010) Vol 11 No 2, Dec (2009) Vol 11 No 1, June (2009) Vol 10 No 2, Dec (2008) Vol 10 No 1, June (2008) Vol 9 No 2, Dec (2007) Vol 9 No 1, June (2007) Vol 8 No 2, Dec (2006) Vol 8 No 1, June (2006) Vol 7 No 2, Dec (2005) Vol 7 No 1, June (2005) Vol 6 No 2, Dec (2004) Vol 6 No 1, June (2004) Vol 5 No 2, Dec (2003) Vol 5 No 1, June (2003) Vol 4 No 2, Dec (2002) Vol 4 No 1, June (2002) Vol 3 No 2, Dec (2001) Vol 3 No 1, June (2001) Vol 2 No 2, Dec (2000) Vol 2 No 1, June (2000) Vol 1 No 2, Dec (1999) Vol 1 No 1, June (1999) More Issue