Forum Mekanika
FORUM MEKANIKA Journal, especially for Civil Engineering Lecturers and generally for all Practitioners to be able to contribute in the form of scientific writing that will be useful for the application of science and technology, especially in the field of Civil Engineering.
Articles
23
Articles
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PEMANFAATAN MATERIAL LOKAL DALAM PEMBUATAN ASPAL PORUS TIPE AC-WC YANG AMAN DAN RAMAH LINGKUNGAN

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Surface of highway pavement is wet during rain and drowned by stormwater. This situation can makes slip of vehicle wheels and causes an accident. Porous asphalt is a new generation in flexible pavement. Porous charactheristic can be obtained by using less fine aggregates comparing the normal one so it has more voids. We can expect the pavement has higher skid resistance and its voids can be functioned as drainage in mix. This type of pavement developement also strongly depends on availability of the approriate local material for that we can produce a good performance porous asphalt which is described in this paper. Consideration of  so many problems can be taken apart, the research is limited in modification design of asphalt concrete wearing course using porous asphalt mix exploits South Sumatera aggregates. After investigatives classification of aggragates, the fine aggregates (sand) can be reduced significantly to obtain a large amount of voids by 6.1% asphalt used. However, this porous structure also causes defect, mainly the stability degradation in mix. So the future research will continue to formularize a better stability performance from pavement variety expected

MODEL INDIKATOR KINERJA PROYEK PADA SEKTOR BANGUNAN PERUMAHAN BERTINGKAT TINGGI REGIONAL D.K.I. JAKARTA

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Successful projects require an increase in project performance to maintain development aesthetics and productivity. Civil Engineer needs to know the indicators in improving project performance. The research aims to identify key performance indicators that include quality, cost, and time criteria in the contractors perspective and models of indicators that have a significant influence on the project of regional high-rise residential using Structural Equation Modeling (SEM) - Partial Least methods Square (PLS). The study was used a questionnaire survey. Questionnaires containing performance indicators were developed using a fishbone diagram approach and verified through interviews with experts in construction projects. The result used to determine the level of importance of indicators with the SEM-PLS method. The results show 40 performance indicators identified in the study. All indicators are grouped in 5 criteria, namely: Human Resources, equipment, material, work methods, and finance. The results of the SmartPLS calculation show a model with 18 main indicators that have an influence on project performance on the criteria of cost, quality and time. Three indicators with the highest level of influence are Training of workers on a regular basis, Complying with K3 when working in the field, and Multi-level supervision according to the project organizational structure.

PENERAPAN VALUE ENGINEERING PADA PEKERJAAN KONSTRUKSI STUDI KASUS PROYEK PEMBANGUNAN RUMAH SAKIT UMUM PROVINSI SUMATERA SELATAN

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Palembang is undergoing development in all fields, along with the increasing population, resulting in an increase in the need for public facilities and infrastructure, such as the Palembang Provincial General Hospital Development Project, control and supervision of costs for the project are needed, because project cost control is important One of them is in the process of managing project costs by using the Value Engineering method, with the aim of the government budget being controlled and this research focused on controlling costs in column and beam structure work. The Value Engineering stage starts from making BreakDown Jobs that are associated with the application of Pareto law and making analysis functions and fast diagraming. Cost savings of the South Sumatra Provincial General Hospital Project Construction obtained from the application of Value Engineering to the Column and Beams work costs of Rp. 3,737,843,286 or 7.02%.

ANALISIS PENGARUH PENAMBAHAN LIMBAH KARET TERHADAP DURABILITAS DAN FLEXIBILITAS ASPAL BETON (AC-WC)

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Availability of roads is an absolute prerequisite for the entry of investment into a region, for this reason it is necessary to plan strong, durable and high durability pavement for plastic deformation. Damage in Indonesia is generally caused by excessive loading. The cause of damage to this pavement requires the use of material for higher quality road pavement in the form of aggregate material as a filler and asphalt as a binder. The addition of rubber waste to the concrete asphalt mixture is a solution for highway planning and reducing pollution of rubber waste produced by rubber factories. From the results of the addition of rubber waste mixture affect the flexibility and durability of asphalt, Marshall Quotien value and residual Marshall Stability that affect flexibility and durability when compared with normal mixtures decreased, the decrease in value was due to the number of cavities in the test object mixed with rubber waste. From the results of the mixture of rubber waste produced an optimization value on Marshall stability in the percentage of 6% rubber waste of 93.68% and Marshall Quotien in the percentage of 6% rubber waste of 272.20 kg / mm.

IDENTIFIKASI PENGARUH PENGGUNAAN RAIL CLIMBING SYSTEM PADA PEKERJAAN KONSTRUKSI COREWALL

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

In structural work, especially corewall, the use of conventional formwork systems decreases work effectiveness over time. PT. Total Bangun Persada, one of the stakeholders that applies innovation to increase the effectiveness of that is by using the rail climbing system as a solution to the problems faced. This study will compare the time effectiveness of conventional systems using corewall using the rail climbing system which was analyzed using cyclone to obtain effective repeat cycles. From the two systems, the results show that the corewall work using the rail climbing system is more effective with a work duration of 78 days compared to conventional system formwork with 84 days of work duration.

EVALUASI KINERJA SIMPANG TAK BERSINYAL (Studi kasus: Simpang Tiga Jambu Jl.Raya Duri Kosambi)

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

The increasing human need for motorized vehicles has an impact on the number of trips made by humans using motor vehicles will increase. This condition is seen during peak hours, namely during working hours and returning to work so that research is needed to reduce congestion and accidents that occur. Calculation of performance intersection use MKJI 1997. File of this research that got from survey in two times on one day, those are morning and afternoon. The results of the intersection research for the existing conditions produce a degree of saturation (DS) of 1.07. This value exceeds the limit suggested by MKJI 1997 for unsigned intersections (DS <0.75). some alternatives are used to improve the performance of the intersection. Alternative I is an unsignalized intersection by giving a traffic signal and produces DS = 0.92. Alternative II with geometric widening of road and traffic signal generating value DS = 0.74 and delay 32.16 det / smp. Level of intersection service is at level C which means stable traffic, travel speed and freedom of movement has been influenced by the large volume of traffic so that the driver can no longer choose the desired speed.

PENGARUH PENAMBAHAN FLY ASH, DODOL PLASTIK, MILLE SCALE DAN SUPERPLASTICIZER TERHADAP KUAT LENTUR BETON

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Concrete is one of the most common construction materials used for road pavement. In pavement concrete roads are required to have good flexural strength, providing sufficient comfort for drivers and durability. To answer the demands, it is necessary to conduct research and experiment, one of the ways is by using added materials (admixture). This study aims to determine the effect of the addition of fly ash, plastic dodol, mille scale and superplasticizer to the flexural strength of concrete. Concrete is planned with fc 29.05 or K-350 with fly ash as much as 10% of cement weight, plastic waste dodol waste 0.15%, 0.25% and 0.35% of sand weight, 5% mill scale of weight of sand and superplasticizer as much as 2% of the water weight. Testing sample at age 7, 14, 28 days, to know compressive strength and flexural strength by converting from result of tensile strength of concrete and absorption.

PENGEMBANGAN SISTEM MANAJEMEN MUTU SEBAGAI ALAT KONTROL PRODUKTIVITAS KINERJA PEKERJA STRUKTUR BERBASIS INEFFECTIVE WORK (STUDI KASUS : PROYEK PADINA SOHO & RESIDENCE)

Jurnal, Redaksi Tim

Forum Mekanika Vol 7 No 2 (2018): Forum Mekanika
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

This study aims to analyze the productivity of structural workers in the Padina Soho & Residence Project and make the Quality Management System based on ineffective work as a tool to control the productivity of structural workers performance. Data collection techniques are carried out by field observations and interviews. The method used to measure the level of productivity is work sampling. The productivity measure obtained from this analysis is the labor utilization rate (LUR). In this study there are three types of structural work observed, formwork, reinforcement work, and casting work. Furthermore, the development of the Quality Management System is based on ineffective work as a tool to control the productivity of structural workers performance.

ANALISA KINERJA PERSIMPANGAN BERSINYAL PADA PERSIMPANGAN ANGKATAN 66 DAN RUAS JALAN R. SOEKAMTO KOTA PALEMBANG

Jurnal, Redaksi Tim

Forum Mekanika Vol 6 No 2 (2017): FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

Transportation is a very important and strategic means to facilitate the movement in an effort to meet the needs of the community. Planning and construction of transportation facilities and infrastructure, greatly influence in determining the increase of economic growth in supporting the achievement of development targets. The real impact that occurs as a result of rapid economic growth, population growth, and changes in land use affects the performance of intersections and roads, especially the problem of congestion, delays, queues opportunities and other issues. Based on the result of calculation analysis which have been done by using Indonesian Highway Capacity Manual method (IHCM), capacity of intersection of Angkatan 66 Palembang on the condition of the morning peak was 3007 smp / hour at peak lunch was 2875 smp / hour and the afternoon peak is 2997 smp / hour. The high movement of vehicular traffic flow at the intersection of Angkatan 66 and the road R. Soekamto indicates that the level of service is not sufficient to meet traffic needs, this can be seen from the Lower level of service or performance (Level of Service / LOS) at the intersection Angkatan 66 and the road R. Soekamto C (0,7908) and D (0,889) are at the level where the current begins unstable operation speed relatively quick decline due to the obstacles that arise. So to overcome the problem of alternative road widening or construction of fly over (fly over) and traffic management in the form of traffic engineering management has to be implemented.

ANALISA PENGARUH ADMIXTURE TERHADAP ABU TERBANG (FLY ASH) DAN BOTTOM ASH

Jurnal, Redaksi Tim

Forum Mekanika Vol 6 No 2 (2017): FORUM MEKANIKA
Publisher : Sekolah Tinggi Teknik - PLN

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Abstract

With improve the quality of concrete is by using the addition of admixture. By adding admixture Silica fume and superplasticizer is expected to improve concrete quality in concrete using fly ash and bottom ash. The main objective of this research is to know the value of concrete compressive strength, slump test value, fresh concrete temperature and setting time in concrete using fly ash and bottom ash by 0%, 5%, 10%, 15%, 20% and 25% by weight of cement, with variations of silica fume 0%, 2%, 4%, 6 %, 8%, 10% of the weight of cement that has been reduced by the weight of fly ash and bottom ash and added with superplasticizer of 2% of the water requirement. The planned concrete quality was 41.7 MPa at 28 days, with the sample tested at age 7, 14, 28 days. Based on the results of the highest concrete compressive strength test for fly ash concrete (fly ash) is found in FA mixture variation 10%, SP 4%, SF 2% that is equal to 56,16 MPa. And for mixed bottom ash the highest compressive strength on mixed variation of BA 5%, SF 2%, SP 2% is equal to 49,82 MPa. Fresh concrete temperature variation of FA mixture 5%, SF 2%, SP 2% and BA 5%, SF 2%, SP 2% rose one degree from normal concrete temperature. Setting time generated on mixed concrete FA 5%, SF 2%, SP 2% has the fastest initial time setting ie 251 minutes of all variations of concrete mix.