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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.

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Articles 7 Documents

Search results for , issue "Vol. 7 No. 1 (2005): MARCH 2005" : 7 Documents clear

THE BUILDER?S LIABILITY BEYOND THE DEFECTS LIABILITY Johnson I IKPO
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper reviews the obligations of a builder after the expiration of the contracted defects liability period using relevant decided cases. The common areas identified as forming the bedrock of litigation pertain to structural and dimensional stability, freedom from damp, durability, adequate drainage, good waste disposal works, and effective service installations. Particular reference is made to walls, roofs, and services, which from the pilot study account for about 46%, 23%, and 17% respectively of the total defects attributable to the builder. It is concluded that the builder is responsible for defects arising from his product till the effluxion of reasonable time, except he establishes an element of contributory negligence.

FAKTOR-FAKTOR PENYEBAB REWORK PADA PEKERJAAN KONSTRUKSI Andi Andi; Samuel Winata; Yanto Handarlim
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

Rework cannot be separated from construction projects. The direct and indirect cost resulting from it are quite significant. This research aims to identify the causes of rework and to propose effective ways to reduce it. It is conducted using questionnaire, which was targeted to consultants and contractors in Surabaya. The results show that defective designs, changes in design, and coordination problems among design documents were the most influencing factors causing reworks. In order to reduce rework, the most effective ways according to the respondents are enhancing and improving communication and coordination among participants during design and construction phases, and also predicting and solving design problems before construction works begin. Abstract in Bahasa Indonesia : Rework tidak dapat dipisahkan dari dunia konstruksi. Dampak biaya langsung maupun tidak langsung yang diakibatkannya cukup signifikan. Penelitian ini bertujuan mengetahui penyebab utama dari rework dan juga memberikan cara yang efektif untuk menguranginya. Penelitian dilakukan dengan menggunakan kuesioner yang ditujukan kepada konsultan dan kontraktor di Surabaya. Hasil penelitian menunjukkan bahwa kesalahan dan perubahan desain, serta buruknya koordinasi antar dokumen desain adalah faktor yang utama penyebab rework. Untuk dapat mengurangi rework, cara yang paling efektif menurut responden adalah meningkatkan dan memperbaiki komunikasi dan koordinasi pada fase desain dan konstruksi, serta memperkirakan dan mengatasi masalah-masalah desain sebelum masuk ke fase konstruksi.

HARAPAN DAN REALITA SISTEM MANAJEMEN MUTU ISO 9000 DALAM PENERAPANNYA DI PERUSAHAAN KONTRAKTOR Connie Susilawati
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

The opening of free market in 2003, leads into the stridently escalating business competition both in domestic and global market. The company, therefore, is trying to win the competition by obtaining ISO 9000 certification which can be applied in the construction business. The purpose of the research is to investigate the reason, the obstacles, the gap between expectation and reality of using ISO 9000, as well as the main priority to be implemented in the company. This research uses survey on contractor companies in Surabaya and Gresik which has implemented ISO 9000. The statistical results show that the main reason to implement ISO 9000 is to increase consistency and to improve its quality. Meanwhile, the main obstacle is time constraint to complete the implementation. Companies still need to increase customer satisfaction and attend on customer focus principle to increase the quality of their outcomes. Abstract in Bahasa Indonesia : Akibat terbukanya perdagangan bebas di tahun 2003, persaingan bisnis makin meningkat tajam baik di pasar domestik (nasional) maupun global (internasional). Salah satu upaya perusahaan untuk memenangkan persaingan dengan peningkatan mutu produk atau jasa adalah mendapatkan sertifikasi ISO 9000 yang dapat diterapkan juga dalam bisnis konstruksi. Adapun tujuan penelitian ini untuk mengetahui alasan, hambatan, perbedaaan antara harapan dan realita, dan prioritas utama ISO 9000 yang harus diterapkan oleh perusahaan. Penelitian ini menggunakan survei terhadap perusahaan-perusahaan kontraktor di Surabaya dan Gresik yang sudah menerapkan ISO 9000. Hasil analisa statistik menunjukkan bahwa perusahaan menerapkan ISO 9000 terutama agar mencapai konsistensi dalam pelaksanaan dan memperbaiki mutu. Sedangkan hambatan terbesar yaitu waktu yang diperlukan untuk melengkapi penerapan. Perusahaan-perusahaan kontraktor tersebut masih perlu meningkatkan kepuasan pelanggan dan menerapkan prinsip fokus pelanggan sebagai prioritas utama untuk meningkatkan mutu perusahaan.

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%.

THE INFLUENCE OF MOLDING WATER CONTENT AND LIME CONTENT ON THE STRENGTH OF STABILIZED SOIL WITH LIME AND RICE HUSK ASH Agus Setyo Muntohar
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

The strength gain of stabilized soils is not only influenced by the type and proportion of the stabilizers and its curing time, but also by the water content needed to maintain the reaction. The reaction of lime – RHA with soil is pozzolanic. Hence, the process will be subjected greatly by the amount of water to react with admixtures and the proportion of the stabilizer. This paper presents the result of a laboratory study on the unconfined compressive strength (UCS) of soils stabilized with lime and RHA, compacted at the OMC, and at the dry and wet side of OMC. The amount of lime required for stabilization (LRS) is determined by Eades and Grim's Method. The results showed that the water content determines the UCS characteristics of unstabilized and stabilized soils. The UCS of stabilized soils decreased with increasing molding water content, but it is still higher than of the un-stabilized soils. In general, higher lime content results to a higher UCS. The maximum strength of the stabilized soil is attained at lime/RHA ratio of 1/2. The UCS of the stabilized soil increased significantly about 7 – 9 times to the un-stabilized UCS.

STUDI AWAL APLIKASI TEORI FUZZY SET PADA PERUSAHAAN READYMIX CONCRETE DALAM MEMILIH PEMASOK MATERIAL BETON Sentosa Limanto; Adi Sanjaya; Tirta Djusman Arief; Josep Buntoro
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

Material supply has a very important role in construction process. Material supply process require suitable and reliable supplier. In this study, fuzzy set theory is used as the appraisal and selection process of material suppliers to supply materials needed to produce concrete mix in a ready mix company. Sinusoidal, Blockley, and Baldwin models are used. This research uses three variables as qualifications, which are quality, performance, and payment. With these qualifications, ready mix concrete company can appraise material suppliers to be selected. It is shown that quality can be represented by Sinusoidal model, performance by Blockley model, and payment by Baldwin model, while the appropriate defuzzification method is maximum composite method. Abstract in Bahasa Indonesia : Aktivitas yang mempunyai peranan penting dalam proses pelaksanaan proyek konstruksi adalah penyediaan material. Proses penyediaan material memerlukan pemasok yang sesuai dan dapat diandalkan. Dalam studi ini dicoba untuk menggunakan teory fuzzy set dalam proses penelitian dan pemilihan pemasok material untuk adonan beton suatu perusahaan readymix concrete. Model yang dipergunakan adalah model Sinusoidal, Blockley dan Baldwin. Kualifikasi yang digunakan dipengaruhi oleh tiga variabel penentu yaitu variabel kualitas, performa dan pembayaran. Dengan kualifikasi tersebut perusahaan readymix concrete bisa menilai para supplier material yang akan dipakai perusahaan. Penelitian ini menunjukkan bahwa penilaian melalui variabel kualitas dapat diwakili oleh model Sinusoidal, untuk variabel performa diwakili oleh model Blockley dan variabel pembayaran diwakili oleh model Baldwin, sedangkan metode defuzifikasi yang sesuai adalah metode maksimum komposit.

PREDIKSI WAKTU LAYAN BANGUNAN BETON TERHADAP KERUSAKAN AKIBAT KOROSI BAJA TULANGAN Agus Santosa Sudjono
Civil Engineering Dimension Vol. 7 No. 1 (2005): MARCH 2005
Publisher : Institute of Research and Community Outreach - Petra Christian University

Concrete is known as a porous building material, this can causes materials outside the concrete mass infiltrate into the concrete. Concrete structures constructed around the beach/seashore tend to have deterioration problems due to salt attack. This paper discusses models to predict the service life of concrete structure based on the deterioration problems. The service life of concrete structure is divided into three periods. Period I is time needed by Cl−ion to infiltrate into concrete up to the surface of the reinforcement, period II is time needed by corrosion products to fill the transition zone pores, and period III is deterioration time. The value of parameters used in the proposed equations is derived from the result of experiments. Finally, the proposed equations were evaluated by the relationship between variations of depth of concrete cover, water cement ratio (W/C) and distance of structure from shore line with service life. It could be concluded that the results of the prediction is satisfactory. Abstract in Bahasa Indonesia : Beton dikenal sebagai bahan bangunan yang berpori. Sifat ini menyebabkan senyawa dari luar dapat berinfiltrasi ke dalam beton. Bangunan beton yang dibangun di sekitar daerah pantai/laut cenderung mengalami kerusakan akibat serangan garam klorida. Makalah ini mendiskusikan model untuk memprediksi waktu layan bangunan beton terhadap kerusakan akibat korosi baja tulangan. Waktu layan bangunan beton dibagi menjadi tiga periode. Periode I adalah waktu yang dibutuhkan oleh ion Cl− untuk melakukan infiltrasi sampai ke permukaan baja tulangan, Periode II adalah waktu yang dibutuhkan oleh senyawa hasil korosi untuk mengisi pori-pori yang ada di transition zone, dan Periode III adalah waktu kerusakan pada bangunan beton. Parameter-parameter yang digunakan dalam persamaan yang diusulkan ditentukan dari hasil pengukuran di laboratorium. Persamaan tersebut dievaluasi dalam hal hubungan antara variasi tebal selimut beton, water-cement ratio (W/C ), dan jarak bangunan dari pantai dengan waktu layan. Hasil prediksi waktu layan bangunan beton terhadap kerusakan akibat korosi baja tulangan dapat disimpulkan cukup memuaskan.

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