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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 10 Documents

Search results for , issue "Vol. 5 No. 2 (2003): SEPTEMBER 2003" : 10 Documents clear

SWELLING AND COMPRESSIBILITY CHARACTERISTICS OF SOIL - BENTONITE MIXTURES Agus Setyo Muntohar
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

Understanding characteristics of soil mixtures lead to increasing the confidence level before applying such materials in the field. The outcomes of this study can provide insight into the swelling and the compressibility behavior of soil – bentonite mixtures, between non-swelling materials and swelling materials. A simple swell and compression laboratory test has been conducted for the purposes of this study. The result of this study indicated that the existence of bentonite in the soil mixtures influence the swelling behavior, which follows a hyperbolic curve model. Amount and size of nonswelling fraction affected the swelling and compressibility.

PENYEBARAN KEKUATAN DARI KOLOM YANG TERBUAT DARI LIMBAH KARBIT DAN KAPUR Gogot Setyo Budi
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

A method commonly used to stabilize expansive soils is mixing the soil with foreign materials. The main obstacle raised from soil stabilization in the field is the difficulty in mixing process. This paper presents the strength distribution in soft soil due to the addition of single columns of quicklime and carbide waste- product from gas industry that contains Calcium Oxide (CaO) up to 60%. The results show that the addition of columns filled with carbide waste product and quicklime increase the shear strength of surrounding soil. The spreading of the strength tends to follow a unique pattern, that the increase of soil shear strength at a certain normalized-distance, S (in column diameter D) from the column axis is constant. A significant increase of strength occurs in the area closer to the column, and it decreases with the distance from the column. Abstract in Bahasa Indonesia : Metode yang umum dipakai untuk menstabilisasi tanah adalah mencampur tanah asli dengan material lain. Kendala utama yang timbul pada stabilisasi tanah di lapangan adalah kesulitan pada proses pencampuran. Makalah ini mempresentasikan penyebaran kekuatan tanah akibat kolom tunggal yang terbuat masing-masing dari kapur aktif dan limbah karbit, yang mengandung unsur Calsium Oksida (CaO) sampai 60%. Hasil penelitian menunjukkan bahwa penambahan kolom limbah karbit dan kolom kapur dapat meningkatkan kekuatan tanah di sekitarnya. Penyebaran kekuatan tanah di sekitar kolom kapur dan limbah karbit cenderung mengikuti suatu pola yang unik, yaitu bahwa peningkatan kekuatan tanah pada jarak (yang dinormalisasikan dengan diameter kolom D) adalah tetap. Peningkatan kekuatan geser tanah yang signifikan terjadi di daerah dekat kolom dan peningkatan ini mengecil seiring dengan jarak dari kolom.

PENGARUH KEGIATAN PERPARKIRAN DI BADAN JALAN TERHADAP KINERJA RUAS JALAN STUDI KASUS JALAN KERTAJAYA Harry Patmadjaja; Julius Urbanus; Paul Tjahjaputra; Rudy Setiawan
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

On-street parking could reduce road capacity, and the extra cost due to traffic congestion is incomparable with the income that is gained from the parking sector. Surveys are conducted in the afternoon and evening peak hours when traffic and number of parked vehicle are at maximum. Based on the survey data the existing road capacity is obtained by analyzing the road segment performance, while the extra cost that should be bore by users of Kertajaya caused by on-street parking is obtained using vehicle operation cost and time value analysis. A parking price simulation gives an optimum combination of a fix and progressive price. For afternoon peak hours a fix price of Rp.3000 for the first hour, and progressive price of Rp.1000 for the next hour, while for evening peak hours a fix price of Rp.2500 for the first hour, and progressive price of Rp.500 for every two hours, are needed to balance the loss due to vehicle operation cost and time value. Abstract in Bahasa Indonesia Kegiatan perparkiran di badan jalan dapat mengurangi kapasitas jalan, kerugian yang dialami oleh pengguna jalan akibat kemacetan tidak sebanding dengan pendapatan yang diterima dari sektor parkir. Survey dilakukan pada saat siang dan sore hari dimana pada saat tersebut arus lalulintas dan jumlah kendaraan yang sedang parkir mencapai puncak. Berdasarkan hasil survey dilakukan analisis kinerja ruas untuk mengetahui kapasitas jalan Kertajaya pada saat ini. Selanjutnya melalui analisis Biaya Operasional Kendaraan (BOK) dan Nilai Waktu (NW), dapat dihitung besarnya kerugian yang dialami oleh pengguna jalan Kertajaya akibat kegiatan perparkiran di badan jalan. Simulasi tarif parkir menghasilkan kombinasi tarif tetap dan tarif progresif yang paling optimum yaitu tarif tetap Rp.3000 per satu jam pertama, tarif progresif Rp.1000 per satu jam berikutnya untuk jam puncak siang, dan tarif tetap Rp.2500 per satu jam pertama, tarif progresif Rp.500 per dua jam berikutnya untuk jam puncak sore agar dapat mengimbangi besarnya kerugian berupa BOK dan NW.

KEKUATAN LEKAT BETON DAN BAJA TULANGAN AKIBAT PEMANASAN Ellen Kumaat
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

The combination of concrete and steel form economical and efficient composite material by means of the created cooperation through bond stress on the interface of both materials. Heating at varying temperature would result in behaviour change of the composite material, particularly regarding its bond stress performance due to the microstructure change of the concrete and steel. The uniaxial compression test indicated that the value of concrete compression strength on seven days if heated at 2000 C , 5000 C, and 8000 C temperature would decrease, varying from six to 100%, whereas the decrease of concrete compression strength on 28 days varying from ten to 90%. At 2000 C heating, the decrease of bond stress between steel and concrete on 28 days was approximately 30%. Heating at a higher temperature or at 5000 C would lead to 40% to 77% decrease. The decrease of concrete compression and that of bond stress due to heating was presented by a non-linear curve showing that there was a positive correlation between the two characteristics. Abstract in Bahasa Indonesia : Perpaduan antara material beton dan baja tulangan akan membentuk material komposit yang ekonomis serta efisien lewat hasil kerjasama yang tercipta melalui kekuatan lekat pada interface kedua material tersebut. Pemanasan dengan temperatur yang bervariasi akan menyebabkan terjadinya perubahan perilaku material komposit tersebut, khususnya menyangkut kinerja kekuatan lekatnya akibat perubahan mikrostruktur pada material beton dan material baja tulangan. Dari hasil uji tekan uniaksial diperoleh nilai kuat tekan beton umur tujuh hari yang bila dipanaskan dengan temperatur 200oC, 500oC dan 800oC akan mengalami penurunan yang bervariasi antara enam hingga 100%, sedangkan penurunan kuat tekan beton pada umur 28 hari berkisar antara sepuluh hingga 90%. Pada tingkat pemanasan dengan temperatur 200oC, penurunan kekuatan lekat antara baja tulangan dan beton umur 28 hari adalah sekitar 30%, serta untuk pemanasan dengan temperatur yang lebih besar atau sama dengan 500oC akan terjadi penurunan sebesar 40% hingga 77%. Penurunan kuat tekan beton dan penurunan kekuatan lekat beton dengan baja tulangan akibat pemanasan dipresentasikan oleh kurva tidak linier serta menunjukkan adanya korelasi positif antara kedua karakteristik tersebu

PENGARUH PENGGUNAAN BOTTOM ASH TERHADAP KARAKTERISTIK CAMPURAN ASPAL BETON Indriani Santoso; Patrick Patrick; Andarias Andarias; Salil Kumar Roy
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

The use of coal as source of energy has produce bottom ashes, which has become a big source of pollution. One of the alternatives to solve this problem is by using this material in road pavement. The purpose of this research is to find the effect of the use bottom ash to replace fine aggregate, toward the stability, flow, air void, void in mineral aggregate and Marshall Quotient of asphalt concrete. In this research the effect of replacing ten to 100 % fine aggregate with bottom ash is evaluated. It is found out that the best result could be obtained by replacing the fine aggregate by ten percent bottom ash. This replacement could fulfill all requirements except the air void. To improve the air void, an additive (chemcrete) has been added. The use of chemcrete has increase the stability and improves the air void of asphalt concrete. Abstract in Bahasa Indonesia : Pemakaian batu bara sebagai sumber energi menghasilkan residu berupa bottom ash yang menimbulkan pencemaran lingkungan. Penggunaan bottom ash sebagai material pekerasan jalan adalah salah satu cara untuk mengatasi masalah tersebut. Penelitian ini bertujuan untuk meneliti efek penggunaan bottom ash sebagai pengganti agregat halus terhadap stabilitas, kelelehan, rongga udara, rongga didalam agregat dan Marshall quotient dari campuran aspal beton. Penelitian dilakukan dengan menguji efek pemakaian bottom ash sebagai pengganti agregat halus sebesar sepuluh sampai 100%. Dari penelitian ditemukan bahwa persentase terbaik penggantian agregat halus dengan bottom ash adalah sepuluh persen. Penggantian ini memenuhi semua persyaratan yang ditentukan kecuali persyaratan rongga udara. Sebuah bahan additif (chemcrete) digunakan untuk memperbaiki rongga udara. Penggunaan chemcrete dapat meningkatkan nilai stabilitas serta memperbaiki nilai rongga udara pada campuran aspal beton.

PENGENDALIAN PELAKSANAAN KONSTRUKSI BERDASARKAN KONSEP NILAI HASIL PADA PEMBANGUNAN PABRIK X DI GRESIK Herry Pintardi Chandra
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

Abstract in Bahasa Indonesia : Catatan redaksi%3A%0D%0A%0D%0APengendalian biaya adalah suatu aspek yang sangat penting dalam manajemen proyek. Pengendalian biaya yang kurang baik%2C tidak jarang menyebabkan biaya konstruksi proyek yang berbeda dengan biaya yang direncanakan. Makalah ini menjelaskan suatu studi kasus pengendalian biaya kostruksi dengan menggunakan Konsep Hasil Nilai%2C suatu metode yang mengintegrasikan hubungan antara biaya dan waktu serta memberikan gambaran tentang kondisi kelangsungan proyek.

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.

PERHITUNGAN KAPASITAS PENAMPANG KOLOM BETON MUTU TINGGI YANG TERKEKANG DENGAN BLOK TEGANGAN SEGIEMPAT EKIVALEN (Dimensi Teknik Sipil, Vol. 5, No. 1, Maret 2003, hal. 45-49) Rachmat Purwono
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

Abstract in Bahasa Indonesia :

MODELLED MECHANISMS IN THE SLAKE-DURABILITY TEST FOR SOFT ROCKS Didi S. Agustawijaya
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

The slake-durability test is regarded as a simple test for assessing weathering of rocks. This simple test has been accepted as a standard test by the Rock Mechanics Society. However, mechanisms into slaking processes have not been fully understood yet as many factors involved in the processes. The current research explored mechanisms performed by the test by conducting a series of slakedurability tests for four types of soft rocks taken from Coober Pedy, South Australia. Results show that the slake-durability index (Id2) of weathered soft rocks was influenced by the degree of weathering. Distinctly weathered rocks had lower indeces compared to partly weathered rocks. Shapes also influenced the Id2 of these soft rocks. Different shapes displayed different mechanisms in the slaking processes. Samples that had irregular shapes tended to have a lower Id2 compared to samples that had rounded shapes. Thus, the slake-durability test might have simple procedures, but it could have complicated mechanisms in slaking processes that contribute to the result of the test.

STUDI EFEKTIFITAS PENGGUNAAN TUNED MASS DAMPER PADA STRUKTUR GEDUNG DALAM MEREDUKSI RESPONS DINAMIK AKIBAT BEBAN SEISMIK Wong Foek Tjong; Robby Sumendap; Freddy Gunawan; Takim Andriono
Civil Engineering Dimension Vol. 5 No. 2 (2003): SEPTEMBER 2003
Publisher : Institute of Research and Community Outreach - Petra Christian University

One of the approaches to reduce excessive oscillation on buildings due to dynamic forces is by installing a mechanical device called tuned mass damper (TMD). This paper presents a study on the effectiveness of TMDs installed on the top story of 1, 5, 10, and 15-story buildings excited by earthquake accelerograms of El Centro 1940, Denpasar 1981, and Pacoima 1971. Two-dimensional linear-elastic shear building model with TMD on the top is used in performing dynamic analysis. The effectiveness of the TMD is evaluated by comparing the responses: displacement, inter-story drift, and acceleration, with and without TMD. The results of the study show that the responses are generally damped. However, in some cases the responses could be larger, thus using of TMD for reducing seismic response should be reconsidered. Abstract in Bahasa Indonesia : Untuk mengatasi masalah guncangan yang berlebihan pada struktur gedung akibat beban dinamis, telah dikembangkan konsep kontrol pada struktur dengan menggunakan Tuned Mass Damper (TMD). Tulisan ini menyajikan studi efektifitas TMD yang dipasang pada struktur gedung 1, 5, 10, dan 15 tingkat yang dikenai akselerogram gempa-gempa El Centro 1940, Denpasar 1981, dan Pacoima 1971 (modifikasi). Dalam melakukan analisis dinamis, struktur dimodelkan sebagai bangunan geser elastis linier dua dimensi dengan TMD pada lantai teratas. Efektifitas TMD dievaluasi dengan membandingkan respons perpindahan, simpangan antar tingkat, dan percepatan dari struktur tanpa dan dengan TMD. Massa TMD ditetapkan sebesar 1%, 2%, dan 3% dari massa struktur utamanya. Hasil studi menunjukkan umumnya respons struktur dapat teredam. Meskipun demikian, pada beberapa kasus dapat terjadi respons struktur bertambah besar, sehingga penggunaan TMD untuk mereduksi respons akibat gempa perlu dipertimbangkan lagi

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