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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 10, Issue 6 - Dec 2010
Volume 10, Issue 5 - Oct 2010
Volume 10, Issue 4 - Aug 2010
Volume 10, Issue 3 - Jun 2010
Volume 10, Issue 2 - Apr 2010
Volume 10, Issue 1 - Feb 2010
Selecting the target year
Spalling Properties of 60, 80MPa High Strength Concrete with Fiber
Kim, Seong-Deok ; Kim, Sang-Yun ; Bae, Ki-Sun ; Park, Su-Hee ; Lee, Bum-Sik ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 3~9
DOI : 10.5345/JKIC.2010.10.4.003
Fire resistance and material properties of high-strength concrete (W/B 21.5%, 28.5%) with OPC, BS and FA were tested in this study. Main factors of the test consisted of fiber mixing ratio and W/B. Two types of fiber (NY, PP) mixed with the same weight were used for the test. The fiber mixing ratios were 0%, 0.05%, 0.1%, and 0.2% of the concrete weight. After performing the test, Under the W/B level of 21.5% and 28.5%, the spalling was effectively resisted by using the high strength concrete with fiber mixing ratios of 0.05%~0.1%. Compressive strength, flowability and air content are similar those of the fiberless high-strength concrete with the same W/B.
Field Application on Mass Concrete of Combined Coarse Particle Cement and Fly-Ash in Mat Foundation
Han, Cheon-Goo ; Jang, Duk-Bae ; Lee, Chung-Sub ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 11~20
DOI : 10.5345/JKIC.2010.10.4.011
This study carried out a Mock-up test to apply Low-heat Cement (CF) that is adjusted to a fineness of
by substituting Coarse particle Cement (CC) and fly ash with ordinary Portland Cement (OPC), then applied it on-site. The result of the test is as follows. The Mock-up test showed that the amount of admixture in CF increased SP agent and AE agent slightly more compared to OPC, while temperature history showed that the highest temperature of CF was around
lower than that of OPC. Compressive strength in CF was low compared to that of OPC, but the strength width became narrow at the age of 28 days, which is not considered to be significant. In on-site application, slump, air content and chloride content all satisfied the target values, while the temperature history showed that the highest temperature in the center by each cast was about
in the first cast,
in the second cast, and
in the third cast. Compressive strength of specimen for strut management showed low value compared to standard curing, but its strength was reduced at the age of 28 days.
Dispute Settlement in Construction Contracts Under FIDIC
Kim, Seong-Chirl ; Jung, Byeong-Hwa ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 21~29
DOI : 10.5345/JKIC.2010.10.4.021
International construction contractors are often faced with the situation of working in an unfamiliar construction environment. Under FIDIC rules, the contractor has the right to make a claim requesting the consulting engineer for an adjustment to the contract price or the time for completion when a part or parts of the works have changed, or in the event of unforeseeable conditions. Contractors generally have more access to the costs and time implications of such a change or unforeseeable conditions than the consulting engineer or outside neutrals. Due to such an asymmetry of information, the contractor may be motivated to dispute frivolous claims of less merit, expecting erroneous judgments by the consulting engineer or the neutrals. In this paper, a claiming behavior model is presented by using game theory and experience data to study the manner in which frivolous claims develop into disputes. The model also analyzes the impacts of DAB/DRB upon the frivolous claims.
A Method of Applying Work Relationships for a Linear Scheduling Model
Ryu, Han-Guk ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 31~39
DOI : 10.5345/JKIC.2010.10.4.031
As the linear scheduling method has been used since the Empire State Building linear schedule in 1929, it is being applied in various fields, such as construction and manufacturing. When addressing concurrent critical paths occurring in a linear construction schedule, empirical researches have stressed resource management, which should be applied for optimizing workflow, ensuring flexible work productivity and continuous resource allocation. However, work relationships have been usually overlooked in making the linear schedule from an existing network schedule. Therefore, this research analyzes the previous researches related to the linear scheduling model, and then proposes a method that can be applied for adopting the relationships of a network schedule to the linear schedule. To this end, this research considers the work relationships occurring in changing a network schedule into a linear schedule, and then confirms the activities movement phenomenon of linear schedule due to workspace change, such as physical floors change. As a result, this research can be used as a basic research in order to develop a system generating a linear schedule from a network schedule.
A Study on the Base Properties of Nickel Type-Antifungal Agent for Reinforced Concrete Hume Pipe Lining
Jo, Young-Kug ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 41~47
DOI : 10.5345/JKIC.2010.10.4.041
It has been continuously noted that many sewage treatment concrete structures have deteriorated due to sulfur-oxidizing bacteria. There have been many reports on approaches to protecting concrete from this bacteria corrosion. The purpose of this study is to evaluate the inhibition of growth of a sulfur-oxidizing bacterium by a antifungal agent such as
, and the characteristics of polymer cement mortar using nickel type antifungal agent. First, we developed antifungal agents using metal nickel and
to inhibit the growth of thiobacillus novellus, which is the sulfur-oxidizing bacteria in concrete. Then, ordinary cement mortar and polymer cement mortar using nickel type antifungal agent with various polymer-cement ratios, and antifungal agent content were prepared, and were tested for the antifungal adding effect, compressive and flexural strengths, expansion and leaching of nickel ion. From the test results, it was confirmed that the adding of an antifungal agent has an inhibition effect on the growth of sulfur-oxidizing bacteria at antifungal agent contents of 20 mM or more. In addition, the strengths and expansion of polymer cement mortars are not significantly changed by the addition of an antifungal agent. Therefore, the nickel-type antifungal agent developed in this study can be used to improve the durability of reinforced concrete hume pipe in the construction industry.
A Study on Benefit/Cost Analysis of Form Work Methods for High-rise Residential Buildings
Kim, Jae-Yeob ; Kim, Jae-Hyun ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 49~57
DOI : 10.5345/JKIC.2010.10.4.049
Selecting an appropriate formwork to fit the construction of a high-rise building is an important factor that can influence the success or failure of a construction. Currently, however, the reality is that in domestic high-rise building construction, the selection of an appropriate formwork with consideration of the characteristics of the formwork has not been done in a reasonable manner. To select formwork in a systematic and reasonable fashion, comprehensive consideration is required that must not only include the aspect of construction costs, but also air, quality, safety, and environmental issues. Therefore, this study aims to rationalize the selection process of formwork by applying the scientific method of Analytic Hierarchy Process (AHP) to the selection process of formwork, in terms of construction costs, quality and safety. To do this, the researcher investigated the current status of formwork being used in high-rise residential building construction. Then, based on the results of this investigation, the researcher selected an alternative for the formwork, and taking construction experts as the subjects of this study, conducted a survey on the applicability of the formwork as well as the priority of management thereof when selecting formwork. It is judged that the results of this research will contribute a more scientific and reasonable decision-making process than the existing non-scientific method in selecting formwork for high-rise residential building construction.
The Effectiveness of Emotional Safety Using PIR Sensors in Building Construction Site
Shin, Han-Woo ; Kim, Gwang-Hee ; Kim, Tae-Hyung ; Kim, Tae-Hui ; Choi, Eung-Kyoo ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 59~65
DOI : 10.5345/JKIC.2010.10.4.059
Many Construction companies are making great efforts to prevent accidents on their work sites. Safety is one of the greatest success factors on a construction project. Nowadays, many safety tools are being applied to construction sites. In addition, an emotional safety culture is an important factor for promoting a "safety first" mindset on construction sites. Therefore, this research aims to examine the effectiveness of the emotional safety system using PIR (Pyroelectric Infrared Ray) sensors to improve the safety mindset in the building construction site. The results of this research revealed that many construction site workers are satisfied with the emotional safety system using sensors. In addition, it was found that voice safety systems give a positive impulse to the workers. By applying this system to construction sites, construction companies can improve safety and work productivity.
Development of the P-C-M (Procurement-Construction-Maintenance) Support Prototype System in Agricultural Facilities
Kim, Mi-Gyeong ; Shin, Han-Woo ; Kim, Tae-Hui ; Kim, Gwang-Hee ; Son, Bong-Ki ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 67~74
DOI : 10.5345/JKIC.2010.10.4.067
Currently domestic rural communities are coping with the modernization of farming and agricultural competitiveness. Nevertheless, year after year many agricultural facilities have accidents due to the collapse or damage of facilities due to natural disasters or technical problems. This research is the development of a P-C-M prototype support system to solve the problems related to collapse or damage accidents at agricultural facilities. The P-C-M support system is a process encompassing procurement, construction and maintenance. In this research, a P-C-M support system process module design is performed, a P-C-M support system algorithm is developed, and a P-C-M support prototype system is developed. In conclusion, the developed P-C-M support system is expected to contribute to information-sharing on agricultural facilities, and communication between the user and suppliers.
A Study on Constructability Estimation of Multi-component High Fluidity Concrete based on Mock-up Test
Kwon, Ki-Joo ; Noh, Jea-Myoung ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 75~82
DOI : 10.5345/JKIC.2010.10.4.075
As structures become larger, taller, and more diverse, a high degree of technology and expertise are required in the construction industry. However, it has been becoming difficult to construct under severe conditions and to fulfill the high performance needs of structures due to a lack of skilled construction engineers. To compensate for these weak points, high-performance concrete and performance specifications have been developed. The application of reliable high-fluidity concrete, which is one of these efforts, is expected to be effective in terms of overcoming severe conditions, reducing the number of workers required, and shortening the construction period. In order to apply high fluidity concrete in the field, practical mock-up tests were carried out to estimate whether self-compaction concrete could satisfy constructability needs. From the results, it was verified that the multi-component high fluidity concrete has excellent flowability in practical structures. In addition, it was shown that the temperature distribution in the concrete due to hydration heat is satisfactory. As a result, it is judged that multi-component high fluidity concrete can be utilized as an effective building material for various structures, including structures related to the electric power industry.
Plans for Reducing Risk through a Case Study of Risk Factors at a Construction Site -Focused on Earth work, Foundation Work, Reinforced Concrete Construction-
Kim, Jin-Ho ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 83~93
DOI : 10.5345/JKIC.2010.10.4.083
With construction projects continuously becoming more massive and complex, risk factors have been consistently increasing. To achieve a successful project, it is very important to identify and cope with such risk factors. Therefore, the purpose of this study is to suggest plans of reducing risk, not only for describing the drafting process for construction planning but also for systematically organizing constraints and risk factors in earth work, foundation work and reinforced concrete construction. To achieve these objectives, this study 1) analyzes previous theories about risk classification structure, 2) performs a case study of an actual project to embody the problems of safety management by analyzing the results of an interview with a construction engineer. In conclusion, the following factors were systematically organized: 1) characteristics of construction site (purpose, structure, floor, etc.); 2) the actual application conditions of the main construction methods; 3) the relationship between constraints and risk factors.
The Selection of Roof Waterproofing Methods using the Analytic Hierarchy Process (AHP) Technique
Choi, Oh-Young ; Cho, Hong-Gyu ; Kim, Gwang-Hee ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 95~103
DOI : 10.5345/JKIC.2010.10.4.095
The purpose of this study is to propose a decision-making technique for selecting waterproofing methods using the Analytic Hierarchy Process (AHP) technique. In this study, a questionnaire survey was given to a group of specialists, which included design specialists, construction specialists, and maintenance specialists, regarding their experience with roof waterproofing methods. The 1st level hierarchy of the questionnaire survey addressed the function, economics, and maintenance of each of the roof waterproofing methods. The rank of 13 items of questionnaire, which is the 2nd level hierarchy of the questionnaire survey, is calculated using Expert Choice Solution. The analysis of questionnaire survey shows that each specialist selects different roof waterproofing methods, and all specialists make much of waterproof performance.
Development of Omnidirectional Object Detecting Technology for a Safer Excavator
Soh, Ji-Yune ; Lee, Jun-Bok ; Han, Choong-Hee ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 105~112
DOI : 10.5345/JKIC.2010.10.4.105
The demand for the development of automated construction equipments is gradually increasing to deal with the current problems of construction technology, such as a lack of experienced workers, the aging of engineers, safety issues, etc. In particular, earth work such as excavation is very machine-dependent, and there has been a great deal of research on the development of an intelligent excavator, which involves great safety concerns. Thus, the objective of this study is to develop the technology to enhance the safety of intelligent excavation systems by developing an omnidirectional object detection technology for the intelligent excavator and applying it to a user-friendly system. The existing literature was reviewed, and the function of various sensor technologies was investigated and analyzed. Then, the best laser sensor was selected for an experiment to determine its effectiveness. An omnidirectional object detection algorithm was developed for a user interface program, and this can be used as the fundamental technology for the development of a safety management system for an intelligent excavator.
Study on the Engineering Properties of 150MPa Ultra-high Strength Concrete
Jung, Sang-Jin ; Yoshihiro, Masuda ; Kim, Woo-Jae ; Lee, Young-Ran ; Kim, Seong-Deok ; Ha, Jung-Soo ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 113~122
DOI : 10.5345/JKIC.2010.10.4.113
In this study, 150MPa ultra-high-strength concrete was manufactured, and its performance was reviewed. As technically meaningful autogenous shrinkage reportedly occurs at a W/B ratio of 40% or less, although it occurs in all concrete regardless of the W/B ratio, the effects of the use of expansive admixture and shrinkage reducer, or of the friction and restraint of forms that may result in the effective reduction of autogenous shrinkage, were reviewed. As a result, considering the flow and strength characteristics, it was found that the slump flow time was shorter with expansive admixture, and shortest with shrinkage reducer. All specimens with
expansive admixture showed high strength at early material age. Their strength decreased due to the expansion cracks when there was excessive use of expansive admixture, and the use of shrinkage reducer did not influence the change in the strength according to the material age. The expansive admixture had a shrinkage reduction effect of 80%, while the shrinkage reducer had a shrinkage reduction effect of 30%, indicating that the expansive admixture had a stronger effect. It seems that mixing the two will have a synergistic effect. The shrinkage reduction rate was highest when the W/B ratio was 20%. The form suppressed the expansion and shrinkage at the early period, and the demolding time did not significantly influence the shrinkage. The results of the study showed that the excessive addition of expansive admixture leads to expansion cracks, and the expansive admixture and shrinkage reducer have the highest shrinkage reduction effect when they are mixed.
A Study on the Loss Reduction Method of Reinforcing Bar through Case Study
Park, U-Yeol ; Jung, Hyeon-Ok ; Kang, Tai-Kyung ; Cho, Hun-Hee ;
Journal of the Korea Institute of Building Construction, volume 10, issue 4, 2010, Pages 123~132
DOI : 10.5345/JKIC.2010.10.4.123
Rebar work accounts for approximately 30% of the total construction costs for rebars and concrete. Recently, the high rising prices of rebars have become one of the principle factors of rising construction costs. Therefore, construction companies are putting much effort into loss reduction of rebars. Consequently, in this study, we wished to present loss reduction methods of rebars before the preparation of the placing drawings. To devise such methods, we collected previous case studies and analyzed methods that were applied for loss reduction. As a result of the analysis, we were able to find the following methods for loss reduction of rebars: method of reducing the number of splices at the mat foundation, method of reducing splice length at the internal columns or walls of the underground parking lot, method of reducing cap-ties of internal beams of basement floors excluding perimeter beams, and method of reducing anchorage length at the internal column or wall of the underground parking lot. Based on those analysis results, we presented our own loss reduction methods of rebars. Applying our methods resulted in considerable loss reduction.