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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 9 Documents

Search results for , issue "Vol. 12 No. 1 (2010): MARCH 2010" : 9 Documents clear

Effect of Steel Fibers on the Behavior of Over-Reinforced Beams Subjected to Pure Torsion Gunneswara Rao T.D.; Rama Seshu D.; Warnitchai P.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

The improvement in torsional properties of reinforced concrete (RC) is becoming extremely important in the modern day constructions. Over the years the steel fiber reinforced concrete (SFRC) is being used for improving cracking characteristics of RC. The present paper deals with the behaviour of over reinforced SFRC members subjected to pure torsional loading. Torsion tests on the 15 reinforced steel fiber reinforced concrete beams revealed that, fiber has noticeable effect on the cracking torque and very little effect on the ultimate torsional strength of the member. However fiber inclusion could improve the torsional toughness of the member.

Owner and Contractor Perceptions Toward Factors Causing Delays in Structural and Finishing Works Andi A.; Lalitan D.; Loanata V.R.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

A construction project comprises of a number of work packages, which are subjected to delays. These delays may be caused by many on-site factors. The aim of this research is to represent owner and contractors perceptions towards delay factors that frequently occur in structural and finishing works. Data for analysis were gathered by distributing questionnaire. A total of 198 sets of questionnaire were gathered and used for subsequent analyses. In general, design changes during construction are perceived by respondents as the most frequent factor to cause delay in all structural and finishing works. The results also show that there are a number of differences between owner’s and contractor’s perceptions towards the occurrences of the factors. Whilst most contractors concern that information factors related to project design and scope frequently causing delays in construction works, owners consider many contractor originated factors, as most frequent delay causes.

Development of Spectral Hazard Map for Indonesia with a Return Period of 2500 Years using Probabilistic Method Asrurifak M.; Irsyam M.; Budiono B.; Triyoso W.; Hendriyawan Hendriyawan
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study is performed to develop spectral hazard map for Indonesia with a Return Period of 2500 years earthquake. It will be proposed for revision of the Indonesian hazard map in SNI-03-1726-2002 as response to the meeting organized by the Department of Public Works on 27- October-2008 in Jakarta. The meeting has decided to revise the Indonesia hazard map by referring to IBC-2006 where spectral acceleration values at Peak Ground Acceleration/PGA, 0.2 and 1.0 second with a return period of 2500 year will be applied for general buildings. The spectral hazard map was analyzed using total probability method and three dimensional (3-D) source models with recent seismotectonic parameters. Four source models were used in this analysis, namely: shallow background, deep background, fault, and subduction source models. Generally, the results of analysis show the values of PGA with a return period of 2500 years relatively higher 1.2-3.0 times than in SNI-03-1726-2002.

Behavior of Expansive Clay of Ngawi Region (East Java) Under Water Content Variation Muntohar A.S.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

Compressive Strength of Volcanic Ash/Ordinary Portland Cement Laterized Concrete Olawuyi B.J.; Olusola K. O.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

This study investigates the effect of partial replacement of cement with volcanic ash (VA) on the compressive strength of laterized concrete. A total of 192 cubes of 150mm dimensions were cast and cured in water for 7, 14, 21, and 28 days of hydration with cement replacement by VA and sand replacement by laterite both ranging from 0 to 30% respectively, while a control mix of 28-day target strength of 25 N/mm2 was adopted. The results show that the density and compressive strength of concrete decreased with increase in volcanic ash content. The 28-day, density dropped from 2390 kg/m3 to 2285 kg/m3 (i.e. 4.4% loss) and the compressive strength from 25.08 N/mm2 to 17.98 N/mm2 (i.e. 28% loss) for 0-30% variation of VA content with no laterite introduced. The compressive strength also decreased with increase in laterite content; the strength of the laterized concrete however increases as the curing age progresses.

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.

Building Blocks Incorporating Waste Materials Bound with Bitumen Thanaya I.N.A.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper described an investigation and evaluation which was carried out in the United Kingdom-UK, on the properties of masonry building block materials that incorporate waste materials, namely: steel slag, crushed glass, coal fly ash, rice husk ash (RHA), incinerator sewage sludge ash (ISSA), municipal solid waste incinerator bottom ash (MSWIBA) or shortened as IBA, bound with bitumen or asphalt, named as Bitublock. The binder used was 50 pen bitumen. The properties of the blocks evaluated were: compressive strength, density, porosity, initial rate of suction (IRS), creep, and volume stability. It was found that the Bitublock performance can be improved by optimizing porosity and curing regime. Compaction level of 2 MPa and curing regime of 200°C for 24 hours gave satisfactory bitublock performances that at least comparable to concrete block found in the United Kingdom (UK). The Volume stability (expansion) of the unit is affected by environment relative humidity.

An Appraisal of Project Procurement Methods in the Nigerian Construction Industry Babatunde S.O.; Opawole A.; Ujaddughe I.C.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

The aim of every client at the beginning of any project is to have at the end of the day a quality structure delivered on time and within budget. However, researches have shown that in most cases this aim is not met. The aim of the study that formed the basis for this paper was to identify and assess procurement methods in use in the Nigerian construction industry and identify the factors that affect the choice of the variants under the traditional and the non-conventional procurement methods. Data were collected using well-structured questionnaires administered to professionals in Lagos metropolis. Data collected were analyzed using descriptive and inferential statistics. The study reveals that the variants of traditional method of contract procurement are the most adopted in project execution in Nigeria. In making choice of procurement method, the study reveals that project completion at estimated time ranks as the highest factor considered for traditional method, while quality assurance ranks highest with non-conventional method.

Sidoarjo Mud: A Potential Cement Replacement Material Nuruddin M.F.; Bayuaji R.; Masilamani M.B.; Biyanto T.R.
Civil Engineering Dimension Vol. 12 No. 1 (2010): MARCH 2010
Publisher : Institute of Research and Community Outreach - Petra Christian University

This paper presents an experimental and analytical research conducted to study the properties of mortar when treated Sidoarjo mud was added into the mix replacing partially the cement content. The replacements were done at 0, 5, 10, 15, and 20%. Compression, tensile, porosity and Ultrasonic Pulse Velocity (UPV) tests were conducted to evaluate the effect of Sidoarjo mud in mortar. Analyses on the mud were also conducted through X-ray diffraction (XRD), X-ray Fluorescence (XRF), and scanning electron microscope with an energy dispersive X-ray analysis system (SEM-EDX). The results showed that the mud could be used as a cementitious material with optimum ordinary Portland cement (OPC) replacement at 10%.

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