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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Institute of Building Construction
Journal Basic Information
Journal DOI :
The Korean Institute of Building Construction
Editor in Chief :
Volume & Issues
Volume 9, Issue 6 - Dec 2009
Volume 9, Issue 5 - Oct 2009
Volume 9, Issue 4 - Aug 2009
Volume 9, Issue 3 - Jun 2009
Volume 9, Issue 2 - Apr 2009
Volume 9, Issue 1 - Feb 2009
Selecting the target year
송도신도시국제학교 프로젝트 운영 및 시공품질관리
Kim, Byeong-Ho ; Park, Hui-Gwon ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 6~13
DOI : 10.5345/JKIC.2009.9.5.006
대전지방경찰청 청사 신축공사
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 14~21
DOI : 10.5345/JKIC.2009.9.5.014
Engineering Properties of Sound Absorbing Foamed Concrete Using Bottom Ash Depending on Mix Factors
Kim, Jin-Man ; Kang, Cheol ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 63~70
DOI : 10.5345/JKIC.2009.9.5.063
This study is part of an ongoing research project on the development of a sound-absorbing lightweight foamed concrete manufactured by a hydro-thermal reaction between silica and calcium. As the silica source, pulverized bottom ash was used, and as several cementitious powders of ordinary portland cement, alumina cement and calcium hydroxide were used. Manufacture of foamed concrete was accomplished using the pre-foaming method to make a continuous pore system, which is the method of making the foam by using a foaming agent, then making the slurry by mixing the foam, water, and powders. The experiment factors are W/B, foam agent dilution ratio, and foam ratio, and test items are compressive strength, dry density, void ratio, and absorption rate, as evaluated by NRC. The experiment results showed that the sound absorption of lightweight foamed concrete satisfied NRC requirements for the absorbing materials in most of the experiments. It is thus concluded that foam ratio was the most dominant factor, and significantly affected all properties of lightweight foamed concrete in this study. W/B rarely affected total void ratio and continuous void ratio as well as compressive strength, and dry density and foam agent dilution ratio also had little effect onalmost all properties. The analysis of the correlation between NRC, absorption time, continuous void ratio, and absorption time showed that the interrelationship of the continuous void ratio was high.
A Study on the Water Permeability and Drying Shrinkage of Polymer Cement Composites
Jo, Young-Kug ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 71~77
DOI : 10.5345/JKIC.2009.9.5.071
In a range of forms, such as latex, water-soluble polymer, liquid resin, and monomer, polymer dispersions have been widely used in the construction industry as cement modifiers because of their excellent properties, such as acid-resistance, water-proofness, and good ductility in mortar and concrete. Polymer cement slurry (polymer-modified slurry) is made of cement and polymer dispersions, with a high polymer-cement ratio of 50% or more. The purpose of this study is to evaluate the water permeability and drying shrinkage of polymer cement mortar (polymer-modified mortar) and cement concrete coated by polymer cement slurry. The polymer cement mortar and cement concrete are prepared with various polymer types, polymer-cement ratios and curing methods, and are tested for water permeability, drying shrinkage and strength. The test results showed thatthe weight of permeable water of polymer cement mortar decreases with an increase in the polymer-cement ratio, reaching a minimum at the polymer-cement ratio of 20%. In particular, the weight of permeable water of St/BA-modified mortar with a polymer-cement ratio of 20% coated with St/BA-modified slurry is about 1/55 that of unmodified mortar. The EVA- and St/BA-modified slurries coated on cement concrete have about 4 or 5 times higher drying shrinkage compared to cement concrete. The strength of polymer cement mortars tends to increase with a higher polymer-cement ratio, and is considerably higher than that of unmodified mortar. It is thus concluded that polymer cement mortars coated by polymer cement slurry are effective for industrial application, and have superior properties such as waterproofness and strengths, compared with conventional cement mortar.
A Study on the Application of RTLS Technology for the Automation of Spray-Applied Fire Resistive Covering Work
Kim, Kyoon-Tai ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 79~86
DOI : 10.5345/JKIC.2009.9.5.079
In a steel structure, spray-applied fire resistive materials are crucial in preventing structural strength from being weakened in the event of a fire. The quality control of such materials, however, is difficult for manual workers, who can frequently be in short supply. These skilled workers are also very likely to be exposed to environmental hazards. Problems with construction work such as this, which are specifically the difficulty of achieving quality control and the dangerous nature of the work itself, can be solved to some degree by the introduction of automated equipment. It is, however, very difficult to automate the work process, from operation to the selection of a location for the equipment, as the environment of a construction site has not yet been structured to accommodate automation. This is a fundamental study on the possibility of the automation of spray-applied fire resistive coating work. In this study, the linkability of the cutting-edge RTLS to an automation system is reviewed, and a scenario for the automation of spray-applied fire resistive coating work and system composition is presented. The system suggested in this study is still in a conceptual stage, and as such, there are many restrictions still to be resolved. Despite this fact, automation is expected to have good effectiveness in terms of preventing fire from spreading by maintaining a certain level of strength at a high temperature when a fire occurs, as it maintains the thickness of the fire-resistive coating at a specified level, and secures the integrity of the coating with the steel structure, thereby enhancing the fire-resistive performance. It also expected that if future research is conducted in this area in relation to a cutting-edge monitoring TRS, such as the ubiquitous sensor network (USN) and/or building information model (BIM), it will contribute to raising the level of construction automation in Korea, reducing costs through the systematic and efficient management of construction resources, shortening construction periods, and implementing more precise construction
Development of a Materials Management System Considering Construction Supply Chain Management
Jang, Myung-Hoon ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 87~93
DOI : 10.5345/JKIC.2009.9.5.087
A construction supply chain needs an integrated information system, as the general contractor and subcontractors must communicate regularly with one another and share a substantial amount of information in their cooperative work. In the construction industry, supply chain management is necessary in the management of a system, including business process improvement, participant-oriented management, and the supply chain. This research proposed a supporting system and developed the prototype focusing on materials that play an important role in the supply chain. Construction projects are managed mainly through schedule management. As such, supply chain management should be linked with schedule management. The research implemented a prototype of the supporting system for construction supply chain management. The prototype was implemented in Microsoft Project using VBA, including a simulation tool based on @Risk for Project.
An Optimal Design Algorithm of Pile Supported Foundations of Tower Cranes
Ryu, Sang-Yeon ; Seo, Deok-Seok ; Kim, Sun-Kuk ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 95~101
DOI : 10.5345/JKIC.2009.9.5.095
As buildings increase in height, lifting plans are becoming increasingly important on construction sites. As a critical piece of load-lifting equipment, the tower crane deserves a well thought-out stability review, since it has a significant impact and is very vulnerable to structural safety disaster. To ensure the structural stability of a tower crane, its lateral support or pile supported foundation designs must include consideration for stability, and pile foundation must be used if site conditions prevent soil from providing the required bearing capacity, or prevent the foundation from being increased to the required extent. Pile supported foundation design requires thorough and systematic review, as more stability parameters need to be considered than with an independent foundation. This paper intends to develop an optimal design algorithm that can minimize associated costs while ensuring the fundamental stability of pile supported foundation design, limiting the scope of research to fixed-type trolley tower cranes using pile supported foundations. The findings herein on pile foundation stability review parameters, process and optimal design are expected to improve the operational efficiency of staff concerned, and reduce the time and efforts required for pile foundation design.
A Study on the Interpretation for Change Order Clause of USA Government Contract
Cho, Young-Jun ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 103~110
DOI : 10.5345/JKIC.2009.9.5.103
A construction project consists of a variety of contracts for the completion of work. The large number of contracts involved in a single project increases the likelihood that disputes will arise between the parties involved regarding the terms of service. Actually, there are many disputes that are caused by a change 0 order. While such disputes should be settled by interpreting the terms stipulated in the agreement entered between the two parties, the process of dispute settlement is often restricted to arbitration and lawsuit, and as a result the parties tend to avoid it due to its inefficiency. For this reason, in Korea it is hard to find cases of interpreting terms of service, while in the U.S. it is easy to find diverse cases of interpreting terms of service, since there is a process of dispute settlement by each stage by the party who has placed an order. Therefore, this study presents analysis of case studies of contract changes, looking specifically at changes in the scope of the work, changes in quantity, changes in the period of implementation, changes in the method of implementation or attitude, changes in items provided by the government or the delivery place, and the acceptance of such change procedure by a contractor, and the adjustment of a reduction.
AA Study on the Selection Criteria for Delivery Systems of Public Construction Projects in Local Governments
Choi, Eun-A ; Kim, Byung-Ok ; Lee, Sang-Beom ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 111~117
DOI : 10.5345/JKIC.2009.9.5.111
With the current trend in the industry toward increasingly complex, diversified and large construction projects, advanced countries in the construction field have already introduced and applied a variety of methods for placing orders in order to cope with such changes in construction circumstances. In Korea, there have been efforts to continuously improve approaches to placing an order. With the aim of diversifying the methods of Delivery Systems, the "Technical Proposal Type Bid," and the "Design Competition and Technical Proposal Type Bid" were introduced through a revision of Korea`s contract law enforcement ordinance. In line with the government`s efforts, criteria for a method of placing an order that is suitable for a public construction project should be presented. This study enumerates the current issues using a survey for construction projects already placed and an analysis of the current status, and presents the selection criteria for Delivery Systems by business type as an improvement for the problem.
Effect of Mineral Admixture Types on the Engineering Properties and the Drying Shrinkage of the Concrete
Han, Min-Cheol ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 119~125
DOI : 10.5345/JKIC.2009.9.5.119
In this paper, the engineering properties and estimation of drying shrinkage of concrete incorporating fly ash (FA), blast furnace slag (BS) and cement kiln dust (CKD) were discussed. FA, BS and CKD contents ranged from 0% to 20%. Water to binder ratio (W/B) also ranged from 40 to 50 %, with a 5% interval. For estimating drying shrinkage, an exponential model proposed by the author was applied, According to results, the use of FA, BS and CKD resulted in a decrease of flowability and air contents. As expected, the use of admixtures also decreases the early age strength of concrete, while at later age, due to a pozzolanic reaction of FA and BS, the compressive strength was recovered to a value comparable with that of plain concrete. For drying shrinkage, the use of admixtures led to an increase in the drying shrinkage of concrete. The exponential model suggested by the author showed good agreement between the calculated and experimental values both at early age and at later age.
Physical Analysis of High Strength Concrete According to Mixing Methods of Binders for Application Analysis of Pre-Mix Cement
Han, Cheon-Goo ; Lee, Hae-Ill ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 127~133
DOI : 10.5345/JKIC.2009.9.5.127
It is important to increase the strength of binders in order to enhance the strength of concrete. However, when the mineral admixture used for high strength concrete is incorporated individually, its dispersibility decreases due to the phenomenon of compaction, which reduces its fluidity and results in insufficient strength being created. To solve this problem, we can pre-mix each binder in advance to disperse a mineral admixture among binders, which will strengthen the fluidity and strength of concrete. Therefore, this study analyzed the properties of high strength concrete depending on the mix method used, to determine the effect of pre-mix cements ranging from W/B 15 to 35%. It was found that the fluidity of pre-mix increased to a level higher than that of individual mix due to its dispersion and ball bearing effect. The air content was slightly decreased from the result of individual mix due to the micro filler effect, which causes fine particles of silica-fume to fill the voids among cement particles, while the setting time of pre-mix was shorter than that of individual mix, because enhanced dispersion of pre-mix affects hydration heat time. The compressive strength of pre-mix increased due to the phenomenon of compaction of gap structure, and the variation of coefficient decreased by 1.69% on average in strength variation.
Assessment of Project Cost Reduction Potential Adopting Cases-Synthetic Approach - Focused on the Apartment Building Construction Project -
Choi, Jong-Soo ; Choi, Young-Jun ; Chae, Seong-Tae ; Yoo, Sung-Won ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 135~144
DOI : 10.5345/JKIC.2009.9.5.135
The primary focus of this study has been directed towards assessing the potential impact of construction method improvement on a reduction in project cost. A total of 90 actual application cases were collected from a public organization and private construction firms, and 32 cases were used in analysis by adopting a synthetic approach. The level of cost reduction was measured in terms of material and labor cost by comparing the existing method and the improved method. An analysis of the results indicates that project cost can be reduced by up to 5.26 percent compared to a normal project by adopting a synthetic approach. Additional benefits include the assurance of uniform quality, savings in terms of labor and/or materials, and improved productivity. The potential of the applicability of this approach to other types of buildings and the implications of research findings were discussed in detail.
Evaluation Method of Slipperiness of Inclined Floors from a Viewpoint of Safety in Case of the Physically Handicapped Persons in Walking
Choi, Soo-Kyung ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 145~153
DOI : 10.5345/JKIC.2009.9.5.145
The purpose of this research is to compare and analyze the change that must be applied to the evaluation of the slipperiness of an inclined floor, when considering its use by the physically handicapped and by the able-bodied. For this study, a simulator that can reproduce the characteristics of the body sway of a physically handicapped person was developed through a comparative experiment between able-bodied people and people with hemiplegia. In addition, as cale for the evaluation of the slipperiness of flat floors and inclined floors was composed by the sensory test result targeting physically handicapped persons (able-bodied persons wore the body sway for the handicapped and ageing in the experiment) and the able-bodied. In terms of the evaluation of the slipperiness of an inclined floor, it was evaluated that it is safe when the C.S.R` (Coefficient of Slip Resistance) of a healthy person is over 0.30, while it was evaluated that it is dangerous when the C.S.R` of a physically handicapped person is over
. Concerning this difference, it is judged that the reason for this difference is that the walking mechanism differs between an able-bodied person and a physically handicapped person.
Development of Calibration Equation of Portable Slip Meter(ONO·PPSM) through Comparative test of O-Y·PSM and ONO·PPSM
Shin, Yoon-Ho ; Choi, Soo-Kyung ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 155~161
DOI : 10.5345/JKIC.2009.9.5.155
This paper is the result of an investigation of a PORTABLE SLIP METER(ONO PPSM) by means of an experiment to determine its validity as a slip meter. ONO PPSM is a portable slip meter that was designed to address the weak points of PULL SLIP METER(O-Y PSM), which can be used to obtain an accurate measurement of slip resistance, but is very heavy and difficult to operate. To determine the stability of the measurement result of ONO PPSM, we measured the slip resistance against 4 different kind of floor materials. Our findings showed that the coefficient of variability of CSR` is less than 0.05. Furthermore, we verified the relationship between CSR` and CSR. More specifically, by performing the slip test against 7 different kinds of inorganic matter floor materials, we increased the usability of ONO PPSM as a slip meter by suggesting a method of sharing the evaluation index of slip of CSR` and C.S.R.
A Strategy to Improve Customer Service for Apartment Building Units
Lee, Hyun-Min ; Lee, Dong-Hoon ; Kim, Sun-Kuk ;
Journal of the Korea Institute of Building Construction, volume 9, issue 5, 2009, Pages 163~172
DOI : 10.5345/JKIC.2009.9.5.163
As customers are becoming increasingly important in corporate management, there is a growing demand for migration to customer-focused organizational structures. Unlike the manufacturing industry, the construction industry is non-iterative and non-standardized. As a result, a wide variety of materials, human resources, technologies and equipment must be mobilized in complex work activities to complete a structure. Consequently, surprises are bound to occur as such work activities progress. This paper intends to study a strategy that is designed to improve customer services for apartment building units. It aims primarily to focus on cost control and brand management. Housing tenants and industry experts are surveyed to collect input for issue analysis. In addition, the external circumstances and internal capabilities of major builders in Korea are analyzed, and a SWOT analysis is performed regarding market conditions related to customer service. These analysis results are utilized to develop a strategy implementation plan over different time frames, and the operational resources available for such strategy implementation are analyzed in order to forecast its performance. This research will facilitate communication between construction companies in Korea and their customers by proposing a customer service improvement strategy for apartment building units, and is expected to provide resource material for a strategic analysis of efforts to fully incorporate customer requirements