Tanaman Eceng Gondok yang tumbuh sangat cepat berdampak negatif bagi fungsisungai, rawa dan danau dimana akar tanaman yang menggantung ini menyerap oksigenyang berada disekitarnya. Aliran air sungai jadi terhambat karena penuh oleh tanamanEceng Gondok, oleh karena itu perlu adanya pemanfaatan Eceng Gondok yang positifseperti sebagai bahan tambah campuran beton.Pengujian laboratorium dilaksanakan dengan menambahkan serat batang EcengGondok pada beton. Penambahan serat sebesar 0,25 %, 0,50 % dan 0,75 % subtitusiterhadap agregat halus. Pengujian yang dilakukan yaitu uji kuat tekan dan uji kuat tarikbeton dengan mutu K-225.Hasil penelitian menunjukan penurunan kuat tekan beton sebesar 7,54 % terhadapbeton normal pada komposisi serat Eceng Gondok 0,25 %. Begitu juga dengan nilai kuattarik beton terjadi penurunan sebesar 7,57 % terhadap beton normal pada komposisi seratEceng Gondok 0,25 %. Seiring dengan pertambahan kadar serat Eceng Gondok, nilai kuattarik dan tekan semakin menurun.

ABSTRAK Pertambahan kendaraan bermotor setiap tahun yang tidak diimbangi dengan penambahan ruas jalan berdampak terhadap menurunnya kinerja jalan terutama pada jam-jam puncak pagi dan sore. Tingkat kepadatan lalulintas yang terjadi pada simpang bersinyal Jl. A. Yani dengan Jl. M. Hasibuan -Jl. KH. Noer Ali kota Bekasi diakibatkan oleh tingginya volume kendaraan dari empat lengan simpang tersebut. Letaknya yang berada di pusat kota, menjadikan simpang tersebut padat terutama pada jam puncak sehingga berpengaruhi terhadap kapasitas, derajat kejenuhan dan tingkat pelayanan simpang / Level of Service (LOS). Untuk mengetahui kondisi operasional simpang dan mendapatkan data yang akurat maka dilakukan survei secara langsung, yaitu meliputi survei volume lalulintas, survei kecepatan kendaraan, survei geometrik simpang dan survei waktu sinyal lalulintas. Survei dilakukan pada jam puncak pagi, siang dan sore selama 3 hari. Metode pengolahan data hasil survei dianalisis menggunakan software KAJI ver. 1.10x dan MKJI 1997. Evaluasi hasil analisis tingkat pelayanan simpang bersinyal tersebut menunjukkan bahwa tingkat pelayanan simpang pada level "F" atau sangat buruk. Beberapa alternatife perencaaan telah dilakukan untuk mengurai kemacetan, diperoleh sebuah perencanaan yang paling memungkinkan untuk diterapkan yaitu perencanaan alternatife II. Pada alternatif perencanaan II diperoleh tingkat pelayanan simpang tertinggi pada level "B", dengan demikian dapat diasumsikan bahwa tingkat pelayanan simpang berada kondisi optimal untuk melayani volume lalulintas pada simpang bersinyal Jl. A. Yani dengan Jl. M. Hasibuan -Jl. KH. Noer Ali. Kata kunci: Simpang bersinyal, Level of Service (LOS) , software KAJI brick mixture to replace sand. Therefore, it can minimize the use of sand and reduce iron shavings. The study was conducted by changing the standard size of the brick according to SNI to a size of 10 x 10 x 10 cm. The results showed that the addition of iron shavings in the concrete mixture was able to increase compressive strength value. The percentage increases in compressive strength of normal concrete blocks were: 14.87%, 24.79%, 45.45%, and 71.90%. The compressive strength of ordinary concrete brick of age 7 days is 41,374 KN, and after iron shaving addition the strength improve by 47,529 KN, 51,632 KN, 60,18 KN and 71,123 KN with the percentage of iron shaving of 2.5%, 5% , 7.5% and 10% respectively. These improve value was also categorized as quality I, II and III according to SNI 03-0349-1989 requirement. ABSTRACT Material construction resources are very limited, but the demand for these materials tends to increase. Therefore, it is necessary to search for alternative materials such as utilizing used goods (garbage) as construction materials. An alternative material used in this study was iron shavings waste as an additional material in the concrete

Nowadays, delays in project often occur and cause various losses both for service providers and users. For the contractors, delays create the project cost overruns due to project overtime and can decrease contractor credibility in the future. This study aims to analyze a project delay by minimizing the work delays earlier. The analysis of a hotel building planning regarding the cost and time delays is done qualitatively by distributing questionnaires to the contractors and processing the responses using the SPSS software. The results of the S curve analysis and 30 factors that caused the project delay were identified and indicated that there was a delay value of 1.26% with five variables that most contributed to the delay in the construction project at PT. Wijaya Kusuma Contractors, i.e. reworking due to construction errors, low coordination between contractors and stakeholders, late material delivery, and equipment shortages.

ABSTRAK Penelitian ini bertujuan untuk mengevaluasi suatu proyek untuk dapat diketahui dan diantisipasi terjadinya keterlambatan progress proyek. Dalam proses evaluasi proyek ini dilakukan identifikasi mendalam terhadap aspek -aspek yang mempengaruhi keterlambatan progress proyek, seperti aspek teknis, sumber daya manusia dan keuangan. Dilakukan survey/investigasi ke lapangan untuk mengetahui permasalahan yang mengakibatkan terjadinya keterlambatan dan menganalisis data-data untuk mengidentifikasi adanya indikasi keterlambatan progress atau kerugian proyek secara dini. Untuk dapat mengetahui kinerja suatu proyek yang harus selalu sesuai dengan target -target rencana, metode yang dipakai adalah metode Earned Value Method (EVM) dengan indikator -indikator : Actual Cost of Work Perform (ACWP), Budgeted Cost of Work Perform (BCWP), Budgeted Cost of Work Scheduled (BCWS). Hasil perhitungan Earned Value Method (EVM) ini di dapat nilai ACWP sebesar Rp. 430.164.472 sebagai biaya aktual yang harus dibayarkan pada minggu ke-15 dengan keterlambatan -22,385%, nilai BCWP didapat sebesar Rp. 452.804.707,sampai minggu ke-15 untuk biaya pelaksanaan dan untuk perhitungan BCWS pada minggu ke-15 dengan progress pekerjaan mencapai 36,478% di butuhkan budget sebesar Rp.1.172.029.385,-. Maka dalam penelitian ini proyek mengalami keterlambatan sampai dengan minggu ke-15 sebesar -22,385% dan di perkirakan akan mengalami kerugian sebesar Rp. 946.370.216,-Kata kunci: earned value method, evaluasi proyek, kurva S, optimalisasi. . 430,164,472 as actual cost to be paid at week 15 with delay -22.385%, BCWP value is Rp. 452,804,707 until week 15 for the cost of implementation and for calculations BCWS at week 15 with the progress of work reached 36.478% in need budget Jurnal BENTANG Vol. 6 No. 1 Januari 2018 amounted to Rp.1,172,029,385. So in this research the project were having a delay until the 15th week of -22.385% and is estimated to lose Rp. 946,370,216. ABSTRACT This research aims to describe how to evaluate a project so that the delay in project progress to be known and anticipated. In the process of evaluating this project, there is a deep identification of the aspects affecting the delay in project progress, such as technical aspects, human resources and finance. Conducted survey/investigation into the field to find out the problems that resulted in the occurrence of delays and analyze the data to identify any indications of delay in progress or loss of the project early. To be able to know the performance of a project that must always be in accordance with the target plans, the method used is Earned Value Method (EVM) with indicators: Actual Cost of Work Perform (ACWP), Budgeted Cost of Work Perform (BCWP) Budgeted Cost of Work Scheduled (BCWS). From the calculation of Earned Value Method (EVM) is in can ACWP value of Rp

One reinforced beam element that experiences a shear failure is a high beam; a beam that follows a requirement based on SNI-2847-2013 standard that have the proportion of sliding span (l) and the effective height (d) not more than three. The type of collapse in high beams generally is shear failure in which the crack appears from the area around the placement, propagates and reaching the maximum value at the point of loading. Observation of crack patterns and ultimate loads can be done by several methods based on both non-linearity and linearity of materials. Two specimens consisted of one high beam conventional reinforced concrete and one high beam concrete fiber with a dimension of 170 mm x 420 mm x 850 mm were prepared. Fiber from machine turning waste was used as coarse aggregate substitution with 100% composition in fiber concrete. Both specimens were tested in the laboratory and observed for crack patterns analysis and ultimate load achievement. The experimental test results were then compared with the numerical test results for the non-linearity properties of the material and the Strut and Tie method for the linearity properties of the material. The ultimate high beam of conventional reinforced concrete when experiencing shear failure in the experimental method, numeric method, and strut and tie method were 310 KN, 290 KN, and 236.917 KN respectively,  whereas in the high beam fiber concrete, the ultimate load in the experimental method, numeric method, and in the strut and tie method were 280 KN, 260 KN, and 263,917 KN respectively. The biggest ratio of test results were obtained from the comparison between the numerical and the experimental methods in conventional concrete which was equal to 0.94. This showed the similarity of non-linearity properties of the material to produce adjacent test results.