Vol. 27 No. 2 (2020)

The type of offshore platform for oil and natural gas exploration that is widely used in Indonesia is steel jacket platform. Jacket type platforms are generally made of tubular steel. During the service life, jacket type platforms often suffer damage to the joints. One preferred repair method for platform structure elements is by grouting. In the API RP 2A WSD NORSOK N-004 regulations, the formulations of tubular joint capacity reinforced by grouting are specified. The formulations in the regulations are empirical equations that need to be examined experimentally in the lab or tested by…

The used rubber tire is one of the waste that becomes an environmental problem because the amount is abundant, while the utilization is still minimal. There are several tire brands in Indonesia, such as Goodyear, Dunlop, Pirelli, Yokohama, Gajah Tunggal, MRF, Bridgestone, and Michelin. This research investigates the physical and mechanical properties of mortars mixed with various brands (A, B, C, and D) of rubber tire crumbs (SKBB). The specimens are 15 pcs of mortar cylinder with 10 cm in diameter and 20 cm in height consisted of SKBB-mortars (12 pcs) and standard mortars (3 pcs). Initially,…

Strengthening slope by bio-engineering/ vegetative method is one of the effort to handle landslides on the slopes by utilizing plants. The purpose of this study was to evaluate the effectiveness of vetiver roots in increasing slope soil cohesion as a review of slope reinforcement. The study was conducted by modeling slope in a model with dimensions of 150 cm × 50 cm × 70 cm with a slope of 70° and 80° as well as soil property testing before and after retrofitting in the laboratory, both physical and mechanical. The mechanical test carried out is testing the shear strength directly on the…

Water Balance is the information of research that explains balancing of potential, supply and demand of water in a certain period of time, and it can be seen wether demand and supply of water have been balanced, so that it can be taken as a decision making for water infrastructure planning. Water potential in Southeast Maluku Regency with Penman Modification and F.J.Mock method has a total monthly dependable flow in 1 year 596,015.m3/second. The availability of water was obtained by the total water resources infrastructure 0,647.m3/second. Water demand were calculated for all sectors in the…

Fishermen around Ciletuh estuary were having difficult times due to their lack of fish cathments. This happens because of sedimentation on Ciletuh estuary, causing the fishermen unable to moor their boats. Sedimentations in Ciletuh estuary is the accumulation of the sediment transport from Ciletuh river. Therefore, analysis is performed regarding hidrology, tidal, wave and sedimentation. The sedimentation modeling is performed by using Delft3D with 3 conditions: wet season, dry season and flood condition. Concluded that the highest sedimentation happens when flood condition is in return…

Construction projects are important sectors that have a major contribution to socio-economic development. On the other hand, construction activities also have a major impact on natural environmental conditions. To overcome this problem, many countries have implemented the concept of sustainable development, one of which is green building. Green building is a concept that seeks to save energy, water and other resources that can be applied to a building. In Indonesia, the concept of green building is widely applied at the planning stage, but expensive costs are an obstacle to assessing the…

The discourse from the ESDM Ministry to increase coal production to 15.7% to a total of 477.91 million tons affects to all coal company in Indonesia. As a result of the increase in coal production target, the barging capacity should also increased. PT BBB is one of the companies that affected by this policy is trying to increase the barging capacity. PT BBB

Delays in the construction of Alila Hotel in Jakarta has become a very valuable and significant lesson for the construction industry. Amongst many other things, the factors behind the delay of the construction of projects are not always alike. This research aims to identify the different factors that cause delays in the construction of the Alila Hotel project. 68 factors that cause delays identified from the 6 activities have been used as a reference for primary data collection using questionnaires. Besides primary data, this research also uses secondary data obtained from project reports.…

Thickness of flexible pavement design is affected by location temperature - this is evident in the empirical mechanistic design method when determining the dynamic modulus of asphalt mixtures. MDP recommends the representative temperature or WMAPT of 41oC while Pedoman Perencanaan Tebal Lapis Tambah recommends standard temperature of 35oC. This study analyzes the representative temperature or WMAPT with an empirical mechanistic approach. Data on axle types, axle loads and hourly temperatures are obtained for Cikampek-Pamanukan STA 20 + 100 Section. The results of the analysis showed that…

Nationally 52% of irrigation networks of 7.2 million hectares are in damaged condition. In West Java, 40% of irrigation networks are also damaged. The research was conducted to study the factors affecting Irrigation Structure Damage (KBI) namely: Water Damage (DRA), Irrigation Management Agency (LPI), Wild Plants (TBL), Waste Volume (SPH), Public Behavior (PLK). The research area is limited to 2 (two) Provinces, West Java and Banten; Sample/ respondent of the research consist of: Irrigation structure 224 pieces with 171 water gate, Performance of Official of PU 101 respondent, P3A / GP3A /…