SIGn Journal of Civil and Architecture

The Productivity of Local Workers in Balinese Indigenous Building Construction

I Putu Laintarawan — 2022-05-15

This study analyzes local labor productivity in Balinese indigenous building construction works. This type of research is quantitative research with a work sampling method that develops the law of probability. The results showed that the installation of the rafters took four days. This case involved 0.039 OH carpenters and 0.139 OH workers in completing a 72.96 m3. At the same time, the installation of eaves takes three days. This case involved 0.139 OH carpenters and 0.069 OH workers in completing a volume of 43 sticks. Furthermore, labor productivity for the installation of rafters based on the calculation of the standard time is 30.37 minutes/m3. Meanwhile, labor productivity for the installation of eaves based on the calculation of the standard time is 39.04 minutes/stick.

Comparison of Tensile Strength of Polyethersulfone Membrane and Titanium Dioxide with Polyvinylidene Fluoride Membrane and Titanium Dioxide

Maya Fatriyana — 2022-05-15

This study aims to compare membrane tensile strength between polyethersulfone (PES) and polyvinylidene fluoride (PVDF) after blending with titanium dioxide. This type of research is a laboratory experiment. The main ingredients in this study consisted of polyethersulfone (PES), polyvinylidene fluoride (PVDF), titanium dioxide (TiO2), and dimethylformamide (DMF). Each specimen was blended with 2% titanium dioxide using the 15,000V DC Electric Field method. Several times, this research was conducted by testing the membrane preparation against polyethersulfone (PES) and polyvinylidene fluoride (PVDF). In this case, each sample consisted of three specimens with the weight fraction (wt%), the ratio of the combination, and addictive substances. Polyethersulfone (PES) with concentrations of PES@TiO2 25 wt%, 30 wt%, and 35 wt%. Polyvinylidene fluoride (PVDF) with concentrations of PVDF@TiO2 21 wt%, 22 wt%, and 23 wt%. The tensile strength test of the membrane showed that PES@TiO2 25 wt% yields 0.414 MPa, PES@TiO2 30 wt% yields 0.418 MPa, and PES@TiO2 35 wt% yields 0.617 MPa. Furthermore, PVDF@TiO2 21 wt% yields 2.335 MPa, PVDF@TiO2 22 wt% yields 3.153 MPa, and PVDF@TiO2 23 wt% yields 3.200 MPa. The results showed that the maximum tensile strength of PVDF@TiO2 membrane with a concentration of 23 wt% was more significant than the maximum tensile strength of PES@TiO2 membrane with a concentration of 35 wt%. Therefore, the PVDF membrane has better mechanical strength than the PES membrane with the same blending with titanium dioxide 2%.

Hunimua Ferry Port Infrastructure Development

Muhram Reza Latukaisupy — 2022-05-15

This study aims to analyze the operational performance of services, utilities, and infrastructure development priorities of Hunimua Ferry Port based on Passenger Service Standards. This research uses the Analytic Hierarchy Process (AHP) method with the Expert Choice application. Data collection techniques were carried out by direct observation, documentation studies, and questionnaires. Hunimua Ferry Port operations serve the Hunimua – Waipirit route with an 11.5-mile route. There are 5 ships operating on this route, namely KMP Terubuk, KMP Inelika, KMP Tanjung Koako, KMP Roka Tenda and KMP Dolosi with a weight of 322 GT to 1,148 GT. The analysis parameters consist of berth occupancy ratio (BOR), yard occupancy ratio (YOR), waiting time (WT), approach time (AT), adequate time/berthing time (ET/BT), and tons/gang/hour (T/ G/H). Data analysis was carried out based on service and operational performance with utility indicators. Analytic Hierarchy Process (AHP) with the application of Expert Choice based on analysis parameters resulted in performance achievements. In this case, the BOR parameter performs well, the YOR parameter performs well, the WT parameter performs well, the AT parameter performs low, the ET/BT parameter performs well, and the T/G/H parameter performs low. The results showed that the infrastructure development of the Hunimua Ferry Port still had to be prioritized. In this case, the Ferry Port manager increases the area/field for storing goods and waiting rooms for motorized vehicles before boarding the ship. Infrastructure development also significantly affects loading/unloading activities to increase labor productivity.

Conductor Pipe Casing Welding in Onshore Drilling Rig: Shield Metal Arc Welding

Hilman Hilmawan — 2022-05-15

This study aims to analyze the effect of dissimilar welding, especially between the temporary wellhead and the heat-affected zone (HAZ) of the conductor pipe casing. This type of research is an experimental research design comparing mechanical properties and microstructure changes between specimens. The primary materials in this research are a conductor pipe casing (API 5CT Grade K55) with a diameter of 20 inches, a temporary wellhead (AISI 4130), and a welding rod (AWS A5.1 E7016) with a size of 3.2 mm x 400 mm. This study used five specimens determined based on passing the non-destructive test (NDT) of magnetic particle inspection (MPI). Prior to the splicing test, each specimen was heated at 250⁰C. Test the connection on each specimen using shield metal arc welding (SMAW). Each specimen will undergo a joint test with a different number of welds. In this case, the first specimen undergoes a joint test with one welding, and so on until the fifth specimen undergoes a joint test with five repetitions of welding. The results of the HAZ conductor pipe casing connection will be assessed based on metallography macro-micro, chemical composition, and hardness. The results showed that the number of temporary wellhead welding on the HAZ conductor pipe casing was significantly affected. In this case, the HAZ conductor pipe casing becomes wide, and the microstructure shrinks. In addition, carbon equivalent (Ceq) and hardness have increased.

Prospects of Makassar - Maros - Malino Alternative Rutes Development in South Sulawesi

Hartono Hartono — 2022-05-15

This study aims to analyze the relationship between individual preferences and the choice of alternative routes. In addition, this study wants to find variables that significantly affect the selection of alternative routes. Furthermore, analyzing the sensitivity of alternative route development. This study uses questionnaires and interviews to use a survey method with data collection techniques. The number of samples used is 250 respondents. This study presents three alternative route options to respondents. The data analyzed is used is the conditional logit model with STATA software. The data obtained from the survey results are quantitative and qualitative. Quantitative data includes age, distance and travel time, income, and transportation costs. At the same time, the qualitative data includes gender, occupation, education, travel destination, and the main reasons residents choose alternative routes of Makassar, Maros, and Gowa. The existence of differences in the level of service of each alternative route and differences in the socio-economic conditions of road users will affect their selection. The results showed that road users were more likely to choose the first alternative route. Time and cost are significant variables for road users in determining alternative routes. The route choice between alternatives has a significant effect if the cost variable is added to each of these alternatives. Therefore, further research is needed by including other factors that have not been analyzed in this study. Furthermore, it is necessary to choose another alternative route in Makassar City. In addition, it is suggested that the government pay more attention to the feasibility of the policies taken in overcoming the congestion problem in Makassar City.