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Abstrak :
Setiap perusahaan jasa konstruksi selalu berusaha mengadakan inventori. Dengan inventori diharapkan dapat memperlancar pelaksanaan pekerjaan konstruksi sehingga tidak terjadi stockout material di proyek yang berpotensi mempengaruhi waktu proyek. Tujuan dari penelitian ini adalah mengidentifikasi faktor-faktor risiko inventori, dampak serta tindakan terhadap risiko utama pada proyek jalan di Ambon. Penelitian dilakukan dengan metode wawancara dan kuesioner. Analisa data dilakukan bertahap meliputi uji dua sampel, AHP, level risiko, uji validitas dan reliabilitas, uji korelasi, analisa faktor, dan uji regresi. Hasil penelitian menunjukan bahwa permintaan material yang kurang lengkap atau tidak mencukupi, dan aksesibilitas yang sulit selama proses pengiriman berpengaruh terhadap kinerja waktu. ...... Each construction services company always tries to holding inventory. With inventory is expected to facilitate the implementation of construction works so there is no stockout materials in the projects that could potentially affecting time of the project. The aim of this research is to identify the risk factors and the impact of inventory, knowing the action on the main risk in Ambon road project. Research conducted by method of interview and a questionnaire. Data analysis was conducted in two test sample, AHP, level of risk, test validity and reliability, correlation test, factor analysis and regression test. Research showed that risk factors major effect on performance time road projects in ambon, namely demand material not complete or insufficient, and the difficult accessibility during the process of delivery.

Abstrak :
Oily-sludge is a waste product resulted form the activity of mining, transporting, storing, and refining of petroleum crude oil and categorized as hazardous waste. Therefore to deal with with this material become expensive and should be in line the environmental regulations. On the other hand, oily sludge can potentially be used as a rejuvenator to modify Buton Rock Asphalt bitumen for cold mix with better characteristics.

Abstrak :
Pemanfaatan beton dan mortar sebagai bahan untuk konstruksi jalan semakin meningkat. Tetapi dalam pelaksanaannya memerlukan waktu pengerasan yang lama sehingga menyebabkan timbulnya masalah diantaranya kemacetan jalan. Untuk itu perlu adanya aditif (bahan tambahan) yang dapat mempersingkat waktu pengerasan mortar. Bahan berlignoselulosa diantaranya tandan kosong kelapa sawit (tkks) semakin banyak diupayakan sebagai bahan baku bioetanol generasi kedua. Pretreatment bahan berlignoselulosa untuk memisahkan lignin dari selulosa dan hemiselulosa dapat dilakukan dengan menggunakan basa, asam encer atau steam explosion. Lignin yang terkandung dalam bahan akan dibuang sebagai limbah cair setelah pretreatment. Upaya pemanfaatan lignin menjadi produk bernilai tambah perlu dilakukan untuk meminimalisasi limbah karena lignin sulit terdegradasi dalam kondisi anaerob dan mengurangi biaya produksi. Salah satu cara pemanfaatan lignin adalah sebagai additive (zat tambahan) yang berfungsi sebagai plasticizer dan water reducer pada pembuatan mortar dan beton. Penelitian ini bertujuan untuk memanfaatkan limbah lignin dari pretreatment bioetanol dari tandan kosong kelapa sawit (tkks) sebagai bahan tambahan (additive) pada adukan semen (mortar). Aditif dapat diperoleh dengan cara mengisolasi lignin tersebut pada berbagai konsentrasi dan suhu. Isolat lignin yang dihasilkan dari limbah bietanol digunakan sebagai admixture pada mortar sebagai pengurang air (water reducer). Adukan semen (mortar) yang dihasilkan diuji berdasarkan SNI 03-1972-1990 dan 03-1974-1990. Lignin dari tkks ternyata dapat digunakan sebagai water reducer pada adukan semen dengan peningkatan workability sebanyak 24,4% dibanding kontrol. Penambahan lignin dari tkks dapat meningkatkan kuat tekan dari mortar pada usia mortar 7 dan 28 hari dibandingkan mortar dengan lignosulfonat komersial dan kontrol pada berbagai faktor air semen. Waktu pengerasan mortar dengan aditif dari lignin meningkat secara cepat yaitu mencapai hingga 80% pada usia mortar 7 hari sehingga waktu curing yang dibutuhkan lebih singkat. Peningkatan kuat tekan tertinggi dengan nilai slump yang baik diperoleh pada penambahan 1% lignin dan faktor air semen 0,45 dengan nilai slump 112mm dan kuat tekan 7 hari 27,88 N/mm2 serta 38,81 N/mm2 pada umur mortar 28 hari, sehingga memenuhi standar beton mutu tinggi. ......The use of concrete and mortar as a material for road construction is increasing, but its implementation requires a long time of concrete hardening, causing problems such as traffic jams. An additive that can shorten the time of hardening of mortar is needed to reduce such problems. Utilization of lignocellulose as bioethanol raw materials has been increasing. Empty palm fruit bunch (epfb) are among of them. The lignocellulosic materials should undergo some pretreatment process to separate lignin from cellulose and hemicellulose, this could be done by using alkaline solution, acid solution or steam explosion Efforts to use lignin into value added products needs to be done to minimize waste due to lignin degradation in anaerobic conditions is difficult and to reduce production costs. One way to utilize lignin is as an additive that serves as a plasticizer and water reducer in the manufacture of mortar and concrete. This study aims to utilize the waste lignin from bioethanol pretreatment from oil palm empty fruit bunches (epfb) as a mortar additive. Additives can be obtained by isolating lignin at various concentrations and temperatures. Isolates produced from waste lignin were then used as an admixture in mortar as a water reducer. The mortars generated were then tested based on SNI 03-1972-1990 and 03-1974-1990. Lignin from epfb can be used as a water reducer in mortar with improved workability as much as 24.4% compared to controls. The addition of lignin from epfb could also increase the compressive strength of mortar at the age of 7 and 28 day mortar compared to commercial lignosulfonate and control on the various water cement ratio. Setting time of mortar with additives of lignin increased rapidly, reaching up to 80% at the age of 7 days so that mortar curing time required is shorter. The highest improvement of compressive strength with suitable workabiliy was reached by 1% lignin addition and 0,45 water cement ratio with 112mm of flow and compressive strength 27,88 N/mm2 at 7 days and 38,81 N/mm2 at 28 days, suitable for high quality concrete.

Abstrak :
Penilaian permukaan jalan adalah proses untuk mengevaluasi kondisi jalan yang ada, mendeteksi semua jenis kerusakan jalan. Kondisi jalan menjadi hal yang penting mengingat salah satu faktor penyebab kecelakaan lalu lintas. Metode penilaian permukaan jalan saat ini mahal, memakan waktu, dan padat karya. Sebagian besar pendekatan penilaian permukaan jalan saat ini menggunakan kendaraan bergerak yang disesuaikan secara unik untuk setiap karakteristik guna memantau permukaan jalan dan hanya memeriksa sejumlah lokasi tertentu. Proyek penelitian ini bertujuan untuk meningkatkan metode penilaian permukaan jalan saat ini menjadi lebih fleksibel, efektif, murah, dan membutuhkan lebih sedikit tenaga kerja. Selain itu, ini akan menghubungkan prosedur penilaian permukaan jalan saat ini dengan deteksi berbasis Smartphone dengan menghasilkan referensi yang komprehensif. Selain itu, tinjauan literatur algoritma pendeteksian berbasis Smartphone dan metode penelitian hadir untuk memfasilitasi tautan tersebut. Deteksi berbasis smartphone memberikan peluang baru untuk meningkatkan metode penilaian jalan karena kemampuannya untuk mengevaluasi area yang lebih luas dan membutuhkan lebih sedikit tenaga, biaya, dan waktu. Namun, pendeteksian berbasis smartphone tidak dapat menggantikan keseluruhan metode penilaian jalan, tetapi memberikan peluang untuk memperkecil ukuran area yang perlu dikunjungi. ......Road surface assessment is a process to evaluate the existing road condition, it detects all kinds of road defects. Road condition is important knowing that it is one of the factors that cause road accidents. The current road surface assessment method is expensive, time consuming, and labour intensive. The majority of the current road surface assessment approach use a moving vehicle that is uniquely tailored for each characteristic to monitor the road surface and examines just a limited number of locations.This research project aims to improve the current road surface assessment method to be more flexible, effective, inexpensive, and requires less labour work. Moreover, it will link the current road surface assessment procedure with Smartphone based detection by generating a comprehensive reference. In addition, literature review of Smartphone based detection algorithms and research method is present to facilitate the link. Smartphone based detection gives a new opportunity to improve the road assessment method due to its ability to evaluate larger area and it requires less labour, cost, and time. However, Smartphone based detection cannot replace the entire road assessment method, but it gives the chance to lessen the size of areas that need to be visited.

Abstrak :
Sebuah konstruksi timbunan badan jalan mengalami kelongsoran dan kemungkinan penyebab kelongsoran harus dievaluasi. Metode penelitian yang digunakan adalah studi parametrik faktor-faktor yang mempunyai kontribusi pada kelongsoran.

Abstrak :
Utilization of the extracting waste of natural asphalt called tailing aimed to obtain variant composition that meet SNI requirement by adding fly ash as filler. This study focused on mortar composition. Extraction process studied is to obtain asphalt with its effectively reaching 15-35%, while the rest (65%) is tailing which is potential but has not been utilized.

Abstrak :
Tulisan ini bertujuan untuk menelusuri pertimbangan pemerintah kolonial dalam membangun prasarana perhubungan untuk memfasilitasi eksploitasi ekonomi di pesisir barat Kalimantan. Untuk itu, tulisan ini menyoal pembangunan jalan sebagai satu-satunya pilihan pemerintah kolonial ketika dihadapkan pada gagasan pembangunan jalur rel kereta api yang kala itu merupakan tren terbaru perhubungan darat dan kenyataan lingkungan yang telah terbangun, yakni jalur air. Persoalan tersebut dikaji menggunakan metode sejarah melalui pendekatan studi perkotaan. Adapun hasil studi menunjukkan bahwa pembangunan jalan merupakan “jalan tengah” yang selaras dengan “ide kemajuan” yang sedang mengemuka di Hindia Belanda dalam konteks Zaman Baru (the New Colonial World). “Ide” yang meliputi ekspansi, efisiensi, dan kesejahteraan terdeteksi dari: (1) embrio jalan di pesisir telah berkembang sejak paruh kedua abad ke-19, (2) pengamanan dan pengawasan daerah-daerah pesisir yang merupakan area bekas pusat Perang Kongsi, (3) pengoptimalisasian lalu lintas ekonomi, dan (4) pengembangan jalan alternatif.

Abstrak :
Construction delays have become endemic in Libya. It is imperative to create awareness of the extent to which such delays can adversely affect project delivery, especially with regard to road construction projects. It is clear that the Libyan road construction industry also faces the issue of not being able to complete projects within the allocated time. This paper identifies the effects of road construction delays, evaluates these through a questionnaire, and assesses them using an empirical method. A detailed review of related literature produced the secondary data, while the primary data was obtained via a structured questionnaire which targeted the road construction projects owners, consultants and contractors. A 71% response rate was achieved; 256 out of the 360 questionnaires sent out were returned. Descriptive statistics were used to analyze the data received from the questionnaires. The findings of the study reveal that the major outcomes of road construction project schedule overruns in Tripoli, Libya include cost overruns, time extensions, disputes, loss of profit, breaches of contract, poor quality of work and company’s bad reputation. The study makes a contribution to the knowledge of the subject of the outcomes of road construction project schedule overruns in Tripoli. Computation of the means and standard deviations, together with a structural equation model, have been used for the data analysis and inference. It is found that delays in road construction projects widely lead to cost overrun, time overrun, litigation and disputes. The findings of the study also provide significant insights into the construction industry, which will help it formulate strategies in order to avoid delays and their consequences. The most important effects identified were time overrun, cost overrun and obstruction of economic and country development. The recommendations and limitations are discussed in the concluding part of the study.