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Civil Engineering Dimension

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Published by Universitas Kristen Petra Surabaya

ISSN : 14109530 EISSN : 1979570X DOI : -

Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

The Civil Engineering Dimension (Dimensi Teknik Sipil) is a refereed journal, published twice a year, in March and September.

Arjuna Subject : -

Articles 466 Documents

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Benchmarking the Performance of Construction Procurement Methods against Selection Criteria in Nigeria Stephen Okunlola Ojo
Civil Engineering Dimension Vol. 11 No. 2 (2009): SEPTEMBER 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

The study developed performance indices by the widely used procurement options in Nigeria on selection criteria. The traditional mean and standardized ratio were used to form the utility coefficients. Results revealed that performance by the procurement options depended on the respondents’ categorization and cost categorization of projects. Public clients ranked the lump sum contracts more able to achieve speed for projects up to N100 million (Naira) while the private clients believe it is the design-build. As regards quality, public clients rated the Build-Own-Operate-Transfer (BOOT) system as most able to achieve the quality criterion whereas private clients rated design-build for projects up to N100 million (Naira). The study then concluded that, in the Nigerian construction industry participants do not agree on the performance of the procurement options on selection criteria.

PRICING STRATEGY IN THE INDONESIAN CONSTRUCTION INDUSTRY Krishna Mochtar
Civil Engineering Dimension Vol. 4 No. 2 (2002): SEPTEMBER 2002
Publisher : Institute of Research and Community Outreach - Petra Christian University

Issues related to pricing strategy in the Indonesian construction industry are covered%2C including problems of current pricing strategy in construction%2C exploration of pricing strategies with a market-based approach%2C and survey findings of the top Indonesian contractors regarding their current pricing practices and the applicability of market-based pricing strategy models developed by Mochtar and Arditi. Comparisons with similar survey findings of the top U.S. contractors are conducted whenever possible. In conclusion%2C the belief that current pricing strategy in construction is predominantly cost-based is confirmed by the survey findings%3B indeed%2C in setting the markup%2C most contractors rely on subjective assessment of the competition. Using simulated bidding scenarios%2C it is discovered that Indonesian contractors tend to be more market-based as they know more about the owner%5C%27s characteristics%2C competitors%5C%27 characteristics%2C and market demand. Consequently%2C the implementation of bidding procedure proposed by Mochtar and Arditi is supported. To maximize the benefits of market-based pricing strategies%2C the bidding procedure change should be explored by all parties involved in the Indonesian construction industry. Abstract in Bahasa Indonesia : Cost-based+pricing%2C+market-based+pricing%2C+pricing+variables%2C+bidding+procedure.

Study on Reactivity of Circulating Fluidized Bed Combustion Fly Ashes in the Presence of Water Salain I.M.A.K.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

A study on reactivity of four different Circulating Fluidized Bed Combustion (CFBC) fly ashes has been realized in the presence of water. Paste of each ash was prepared and analyzed for its setting time, expansion and strength. The products of hydration, and their evolutions over a period of time were identified by X-ray diffraction and differential thermal analysis. The results of this study show that the reactivity of the CFBC fly ashes is strongly related to their chemical composition, essentially to their quantity of silica, alumina, lime and sulfate, which promote principally the formation of ettringite, gypsum and C-S-H. It is further noted that the intensity and the proportion of these phases determine the hydration behavior of the CFBC fly ashes.

ROLLER COMPACTED CONCRETE RCC UNTUK BANGUNAN BENDUNGAN Ruslan Djajadi; Deddy Hardianto; Henry James; Handoko Sugiharto
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

The using of Roller Compacted Concrete (RCC) is one of many alternatives that can be used to decrease dam construction cost. Many Roller Compacted Concrete (RCC) composition has been developed to achieve maximum compressive strength. Due to the economical consideration and the possibility of the execution, drop hammer system has been used for this research. Compression test is done after the age of the sample reaches seven, 28, 60, and 90 days. The result shows that 60/40 composition of gravel/sand has higher average compressive strength on all age of sample. The highest compressive strength the achieve is 17.78 MPa for 90 days sample. Abstract in Bahasa Indonesia : Penggunaan Roller Compacted Concrete (RCC) merupakan salah satu alternatif yang dapat digunakan untuk mengurangi biaya pembuatan konstruksi bendungan. Berbagai komposisi benda uji Roller Compacted Concrete (RCC) dibuat untuk mengetahui kuat tekan yang paling maksimal. Ditinjau dari segi ekonomis dan kemudahan pelaksanaan, maka digunakan sistem alat pemadat drop hammer. Dilakukan tes kuat tekan setelah umur benda uji masing-masing mencapai tujuh, 28, 60, dan 90 hari. Hasil penelitian menunjukkan bahwa komposisi kerikil/pasir sebesar 60/40 selalu memiliki kuat tekan rata-rata yang lebih tinggi pada semua umur benda uji. Kuat tekan terbesar pada benda uji umur 90 hari mencapai 17.78 MPa.

Experimental and Theoretical Deflections of Hybrid Composite Sandwich Panel under Four-point Bending Load Jauhar Fajrin; Yan Zhuge; Hao Wang; Frank Bullen
Civil Engineering Dimension Vol. 19 No. 1 (2017): MARCH 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper presents a comparison of theoretical and experimental deflection of a hybrid sandwich panel under four-point bending load. The paper initially presents few basic equations developed under three-point load, followed by development of model under four-point bending load and a comparative analysis between theoretical and experimental results. It was found that the proposed model for predicting the deflection of hybrid sandwich panels provided fair agreement with the experimental values. Most of the sandwich panels showed theoretical deflection values higher than the experimental values, which is desirable in the design. It was also noticed that the introduction of intermediate layer does not contribute much to reduce the deflection of sandwich panel as the main contributor for the total deflection was the shear deformation of the core that mostly determined by the geometric of the samples and the thickness of the core.

BINDER DRAINAGE TEST FOR POROUS MIXTURES MADE BY VARYING THE MAXIMUM AGGREGATE SIZES Hardiman Hardiman; M.O. Hamzah; A.A. Mohammed
Civil Engineering Dimension Vol. 6 No. 1 (2004): MARCH 2004
Publisher : Institute of Research and Community Outreach - Petra Christian University

Binder drainage occurs with mixes of small aggregate surface area particularly porous asphalt. The binder drainage test, developed by the Transport Research Laboratory, UK, is commonly used to set an upper limit on the acceptable binder content for a porous mix. This paper presents the results of a laboratory investigation to determine the effects of different binder types on the binder drainage characteristics of porous mix made of various maximum aggregate sizes 20, 14 and 10 mm. Two types of binder were used, conventional 60/70 pen bitumen, and styrene butadiene styrene (SBS) modified bitumen. The amount of binder lost through drainage after three hours at the maximum mixing temperature were measured in duplicate for mixes of different maximum sizes and binder contents. The maximum mixing temperature adopted depends on the types of binder used. The retained binder is plotted against the initial mixed binder content, together with the line of equality where the retained binder equals the mixed binder content. The results indicate the significant contribution of using SBS modified bitumen to increase the target bitumen binder content. Their significance is discussed in terms of target binder content, the critical binder content, the maximum mixed binder content and the maximum retained binder content values obtained from the binder drainage test. It was concluded that increasing maximum aggregate sizes decrease the maximum retained binder content, critical binder content, target binder content, maximum mixed binder content, and mixed content for both binders, but however for all mixtures, SBS is the highest.

Condition Assessment of the Deteriorated Reinforced Concrete Bridge Gunawan Budi Wijaya; Narciso Pacuribot
Civil Engineering Dimension Vol. 19 No. 2 (2017): SEPTEMBER 2017
Publisher : Institute of Research and Community Outreach - Petra Christian University

A comprehensive assessment was conducted to an old reinforced concrete bridge in Brunei Darussalam. This bridge is about 30-40 years old, and has already shown signs of concrete distresses. The main concern was the integrity of the columns, beams and deck, as signs of concrete deteriorations were readily noticeable, e.g. cracks, delaminations, exposed rebar, and concrete spalling. Both visual inspection and non-destructive tests were performed on site. For more detail evaluation, concrete core samples were extracted and sent for testing. Based on information gathered during the investigation and the results of laboratory testing, the reviewed concrete columns were found in bad condition and required immediate repair. The main cause of this concrete distress was the reinforcement corrosion. The vertical column reinforcements were badly corroded and could not function as designed. Without initiating a repair program, it should be prepared for progressive deteriorating conditions, eventually leading to a structural at-risk scenario.

ANALISA DAN EVALUASI SISA MATERIAL KONSTRUKSI SUMBER PENYEBAB KUANTITAS DAN BIAYA Suryanto Intan; Ratna S Alifen; Lie S Arijanto
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

Waste material is a crucial problem in building construction. By minimizing waste materials, contractors can increase their profit and minimize the environmental impacts. This research is conducted to obtain the quantities of construction waste material, influencing factors, classify waste materials into direct waste and indirect waste, and propose a cost model of construction waste materials on shop-houses projects. Data are collected by questionnaire survey and construction site observation. The research findings indicate that quantities of bricks and sand waste are the biggest. Cost model findings indicate that minimum value of waste material (good waste management practice) are 3,33%, and maximum value (poor waste management practice) are 4,67% of construction budget for a shop-house building, so “potential waste saving cost” is equal to 1.34%. Abstract in Bahasa Indonesia : Sisa material merupakan salah satu masalah yang serius pada konstruksi bangunan. Usaha minimalisasi sisa material konstruksi akan membantu kontraktor untuk meningkatkan keuntungan dan mengurangi dampak lingkungan. Tujuan penelitian ini adalah untuk mengetahui kuantitas sisa material dan faktor-faktor penyebab, mengkategorikan sisa material berdasarkan direct waste dan indirect waste, dan mengusulkan suatu model biaya sisa material pada proyek ruko. Data penelitian diperoleh melalui survey penyebaran kuesioner pada para pelaku konstruksi, dan pengamatan di lapangan pada komplek proyek ruko di Surabaya. Hasil penelitian menunjukkan bahwa: (1) volume sisa material batu bata dan pasir adalah yang terbesar, (2) model biaya menunjukkan nilai minimum biaya sisa material (good waste management practice) sebesar 3,33%, dan nilai maksimum biaya sisa material (poor waste management practice) sebesar 4,67% dari total anggaran biaya satu ruko, sehingga Potential waste saving cost menjadi 1,34%.

SLAB FORMWORK DESIGN Octavian George Ilinoiu
Civil Engineering Dimension Vol. 8 No. 1 (2006): MARCH 2006
Publisher : Institute of Research and Community Outreach - Petra Christian University

Note from the Editor: In Indonesia, although cost of formwork contributes significantly to the total reinforced concrete construction cost and formwork failure will result in a very complicated construction problem, formwork design is often neglected and left to the foreman to design. This paper presents slab formwork design practice in Romania, where formwork design is a requirement to obtain professional engineer certification. This paper is a continuation of previous paper â Wall Formwork Designâ by the same author published in Dimensi Teknik Sipil, Vol. 6, no. 2, September 2004. Abstract in Bahasa Indonesia : Catatan Redaksi: Perencanaan bekisting (form work) di Indonesia sering kali dilalaikan dan diserahkan kepada pelaksana/ mandor, padahal kegagalan bekisting akan menimbulkan masalah yang sangat rumit. Bekisting juga merupakan komponen biaya pelaksanaan struktur beton bertulang yang cukup besar. Makalah ini memaparkan praktek perencanaan bekisting untuk lantai di Romania, dimana perencanaan bekisting merupakan salah satu syarat untuk mendapatkan sertifikasi insinyur professional. Makalah ini adalah kelanjutan dari makalah Wall Formwork Design, yang dimuat dalam Dimensi Teknik Sipil, Vol. 6, no.2, September 2004.

HUBUNGAN PANJANG ANTRIAN KENDARAAN TERHADAP BERHENTINYA ANGKUTAN UMUM Bastian Wirantono; Fanny Judodihardjo; Prieska Prieska
Civil Engineering Dimension Vol. 1 No. 1 (1999): MARCH 1999
Publisher : Institute of Research and Community Outreach - Petra Christian University

Queue length of vehicles due to stopping of a public vehicle, cause traffic jam. To relate the influence of vehicle volume, by effective width of the road and public vehicle’s stopping time to queue length, linear regression model is used. The result of analysis by states that the best solution to reduce the queue length of vehicle is controlling the public vehicle to stop at the right place and setting a limit of stopping time. Abstract in Bahasa Indonesia : Panjangnya deretan kendaraan jalan raya akibat berhentinya angkutan umum adalah salah satu bentuk kemacetan di jalan raya. Analisa pengaruh panjang antrian ini terhadap volume kendaraan yang lewat, lebar efektif jalan dan waktu henti angkutan umum, menggunakan metode pendekatan dengan cara regresi linier. Hasil analisa mendapatkan solusi yang terbaik berupa penertiban angkutan umum agar berhenti pada tempatnya dan dengan cara yang benar, sekaligus pembatasan lamanya waktu berhenti angkutan kota. Kata Kunci: lebar efektif, panjang antrian, volume kendaraan, waktu henti kendaraan umum

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