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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 8, Issue 6 - Dec 2008
Volume 8, Issue 5 - Oct 2008
Volume 8, Issue 4 - Aug 2008
Volume 8, Issue 3 - Jun 2008
Volume 8, Issue 2 - Apr 2008
Volume 8, Issue 1 - Feb 2008
Selecting the target year
초고층 오피스 빌딩의 첨단 시공/엔지니어링 기술 적용 사례
Sin, Beom-Yeol ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 6~16
DOI : 10.5345/JKIC.2008.8.1.006
A Study on Estimating Construction Equipment Annual Standard Operating Hours
Lee, Joong-Seok ; Huh, Young-Ki ; Ahn, Bang-Ryul ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 37~42
DOI : 10.5345/JKIC.2008.8.1.037
As use of construction equipment has been increasing continuingly, the proportion of equipment expense to the total construction cost has become higher. However, there is a difference between the equipment expenses section in `Poom-Sam` and practical data, because `Poom-sam` does not consider non-working days due to weather conditions, legal holidays and management conditions. Therefore, `Poom-Sam` does not present a reasonable standard for estimating construction equipment expenses. In this study, to estimate realistic construction equipment operating hours, firstly, construction equipment was classified according to work, and weather conditions, in which each work could not be executed, were established. Then, weather data on Seoul and Busan(
) and legal holidays were analyzed to suggest annual standard operating hours. The annual standard operating hours of earthmoving & excavating, compaction, and drilling equipment was estimated to be 1,430 hours, and lifting equipment, concrete paving equipment, asphalt paving equipment, concrete equipment, and crushing & conveying equipment were estimated to be 2,124 hours, 1,156hours, 1,188hours, 1,688hours, and 2,152hours respectively.
Effect of Volume Fraction and Length of Fiber on the Mechanical Properties of Fiber Reinforced Concrete
Yang, Keun-Hyeok ; O, Seung-Jin ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 43~48
DOI : 10.5345/JKIC.2008.8.1.043
Fifteen concrete specimens were mixed and tested to explore the significance and limitation of appling the polyvinyl alcohol (PVA) fiber and steel fiber with end hook to concrete. Main parameters investigated were volume fraction and length of the fibers. The measured mechanical properties of fiber reinforced concrete are analyzed according to the equivalent fiber amount index explaining the adding amount and length of fibers. Test results showed that compressive strength of fiber reinforced concrete was higher than that of concrete with no fiber by
. The normalized splitting tensile strength and flexural strength of PVA fiber reinforced concrete were similar to those of concrete with no fiber, whereas those of steel fiber reinforced concrete increased with the increase of the equivalent fiber amount index. In particular, much higher ductile behavior was observed in steel fiber reinforced concrete than in PVA reinforced concrete, indicating that the slope of descending branch of load-displacement relationship of steel fiber reinforced concrete decreased with the increase of the volume fraction and length of the fiber.
A Case Study on the Quality Management of Construction Site through PDCA Cycle
Baik, In-Whee ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 49~56
DOI : 10.5345/JKIC.2008.8.1.049
According to the recent trends which are the diversity of customer requests and the multi-function of buildings, A construction company`s business has converted from the producer-oriented approach to the consumer-oriented approach. Therefore, each construction company is continuously trying to improve the quality level as a way of corresponding to customer needs in these changing situations. The quality is one of the main management targets which judge the success of a project along with the schedule, the cost and the safety. As construction companies execute the quality management which they aimed at, it should be completed within the optimum schedule and the limit of the budget. Accordingly, the importance of the construction site management to complete a project is continuously increasing. The construction site management is the systematic method to perform the project goals such as the quality improvement, the cost saving and the safety management, which organically operate one another, by procuring the manpower, the material and the machine in the right time. Specially, as the construction industry has based on the construction site, the establish of systematic construction site management, which can effectively correspond sudden changes of the construction business environment, is essential to maximize the construction productivity. On top of that, the necessity of the quality management method is increasing to accommodate customer needs more spontaneously in the construction site. These endeavors could guarantee their competitive power.
Compressive Strength and Shrinkage Strain of Slag-Based Alkali-Activated Mortar with Gypsum
Yang, Keun-Hyeok ; Sin, Jae-Il ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 57~62
DOI : 10.5345/JKIC.2008.8.1.057
Twelve mortars were mixed and tested to explore the effect of gypsum on the compressive strength development and shrinkage strain of alkali-activated mortars. Powder typed sodium silicate and ground granulated blast-furnace slag were employed as alkaline activator and source material, respectively, to produce cementless mortar. The main variables investigated were alkali quality coefficient combining the concentration of activator and main compositions in source material, and the adding amount of gypsum ranged between 1 and 5% with respect to the weight of binder. Initial flow, compressive strength development, modulus of rupture, and shrinkage strain behavior of mortar specimens were measured. In addition, the hydration production of alkali-activated pastes with gypsum was traced using X-ray diffraction and energy-dispersive X-ray analysis combined with scanning electron microscope image. Test results showed that the initial flow of slag-based alkali-activated mortar was little influenced by the adding amount of gypsum. On the other hand, the effect of gypsum on the compressive strength of mortar specimens was dependent on the alkali quality coefficient, indicating that the compressive strength increased with the increase of the adding amount of gypsum until a certain limit, beyond which the strength decreased slowly. Shrinkage strain of mortar tested was little influenced by the adding amount of gypsum because no ettringite as hydration product was generated. However, the adding of gypsum had a beneficial effect on reducing the microcrack in the alkali-activated mortar.
Defect Classification and Management System Using CBR technique Based Internet in Apartment Housing Project
Kim, Gwang-Hee ; Shin, Han-Woo ; Seo, Deok-Seok ; Yoon, Jie-Eon ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 63~70
DOI : 10.5345/JKIC.2008.8.1.063
Management process of apartment buildings construction has increased because the after service of construction company meet the needs of customers. Many defect data, which was inspected by construction company or customers before moving into a new apartment house, were classified by field engineers and then communicated to corresponding subcontractors. The classification process needs to be performed by an expert engineer because there is so much data, it is unfeasible to complete in a short period of time. For this classification process, an automatic classification system using case base reasoning (CBR) should be considered. This research proposed a defect management system with automatic classification system using CBR. This constructed defect management system consists of cyber after service system for tenants and the whole defect management process of construction, preservation and management of apartment buildings. This system could improve the efficiency of expert work in terms of time and accuracy, as well as helping laymen users to conduct defect classification work as experts do.
A Study on the Economic Evaluation Model of Splice of Reinforcement Bar(SD500)
Kim, Jae-Yeob ; Kim, Dae-Won ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 71~76
DOI : 10.5345/JKIC.2008.8.1.071
Recently, the high-rise apartment housings have become a prototype of the urban residential dwelling in Korea and the numbers of one have steadily been increasing. According to this trend, the strength of the construction materials is also fortified to assure the stability and durability of the buildings. Specially, Re-bar of SD500 type is largely used at the construction sites of high-rise building. This study analyzes the current usage of SD500 high-strength re-bar at domestic construction sites. Through the result of this analysis, we develop Economic Evaluation Model that measure economic efficiency of lap splice and coupler splice, which are most commonly used in connection SD500. The evaluation method was applied to construction sites in Seoul in December 2006, and the result revealed that coupler splice is relatively superior in terms of cost efficiency when the re-bar diameter is longer and the concrete strength is lower.
The Research on the Preference Factors of Apartment Brand
Shin, Han-Woo ; Kim, Dae-Won ; Kang, Kyung-In ; Kim, Gwang-Hee ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 77~82
DOI : 10.5345/JKIC.2008.8.1.077
In the housing market, the construction company started to recognize the importance of the brand power since 1998. Many brand names of apartment construction company have newly formed and many apartments are representative of the brands of construction company by quality of apartment construction and service after hand apartment over to owner with many other elements of their brands. According to these trends in the housing market, it should be also interested in improving the value of brand name in apartment construction. The former researches have been achieved several topics in only a specific target market about the distinction of apartment`s plan, the examination of preference, and the satisfaction survey of inhabitants etc. But construction company don`t have developed any available marketing strategy according to construction location and regional characteristics. Nowadays, they should be interested in improving the value of apartment brand. Therefore, this research was conducted by interviewing and surveying preference factor, which factors are considered by consumer when consumers purchase apartment house, to compare the two regions such as Metropolis and Cities. The purpose of this research is to provide the preference trend of apartment house in the future to construction company by comparing consumer`s preference examination.
A Study on the Improvement of Reinforcing Bar Detailing
Park, U-Yeol ; Kim, Baek-Jung ; Jung, Hyun-Ok ; Yun, Seok-Heon ; Cho, Hun-Hee ; Kang, Kyung-In ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 83~90
DOI : 10.5345/JKIC.2008.8.1.083
The reinforcing steel process is composed of the development of placing drawing, cutting and bending, and the placement and fabrication of the reinforcement, and is participated in by reinforcement detailer, the fabricator and placer. Because the reinforcing steel process-from estimating and rebar detailing, to production, material tracking, billing, and general accounting-is conducted by many participant, reinforcement details based on building code and reinforcing bar detailing standards are essential. The process, however, holds some problems. Building code has been revised recently, and the utilization of placing drawings was proved to be low, and the reinforcement estimating in early stage of the process is below what is required for placement. Therefore, in this study, a survey was conducted to the reinforcement detailer, the fabricator and placer of domestic construction industry. According to the analysis of the survey, the reinforcement details on site was not standardized. The improvement in reinforcing steel detailing standards was sought by analyzing the results of the survey including reinforcement constructability.
Influence of Over-Added AE Water Reducing Agent on Physical Properties of the Concrete
Han, Cheon-Goo ; Han, Min-Cheol ; Lee, Dong-Gyu ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 91~96
DOI : 10.5345/JKIC.2008.8.1.091
This study is to investigate the influence of the over-added chemical agents, such as water reducing agent(WRA) and AE water reducing agent(AEWRA), on the physical properties of concrete to estimate the degree of damage due to over-added chemical agents. For the fresh concrete, slump and slump flow increased with the increase of WRA and AEWRA as expected. Material segregation phenomenon was observed with the over dosage of lignin based AEWRA about 4 times larger than recommended dosage. The over dosage of AE water reducing agent about 4 times larger than recommended dosage resulted in an increase of air contents remarkably. The set retardation occurred greatly with the increase of AEWRA and WRA. For the properties of the hardened concrete corresponding to the over dosage of AEWRA, it is found that compressive strength of over added AEWRA and WRA concrete are much smaller than those of base and recommended dosage concrete proportionally due to associated increasing air content.
Improvement Directions for Life Cycle Cost Analysis and Evaluation in the Design-Build and Alternative Bidding Projects
Kang, Tai-Kyung ; Lee, Yoo-Sub ;
Journal of the Korea Institute of Building Construction, volume 8, issue 1, 2008, Pages 97~102
DOI : 10.5345/JKIC.2008.8.1.097
The report of the Korean Board of Audit and Inspection(BAI) on May 2007 indicates the problems of Life Cycle Cost (LCC) analysis and evaluation in the Design-Build(Turn-Key) and alternative bidding system. The point which the report indicates is that the cost estimation system for LCC analysis has nothing in common each other and there`s no consistency among the repair cycle and ratio per facilities parts. For solving these problems, BAI demands the establishment of the guidelines for LCC analysis and evaluation from the competent authority Korean Ministry of Construction And Transportation(MOCT). The objective of this study is to develop the improvement directions for LCC analysis and evaluation which are suitable to the public construction projects especially for the Design-Build and alternative bidding system in Korea. For this study, the LCC related raws and regulations, LCC analysis guidelines of public cooperations, actual condition of LCC analysis and evaluation which include, the elements of LCC, the estimation rules of the initial cost and the maintenance cost, the analysis standards of time value of money, etc. are investigated to provide the improvement directions for LCC analysis and evaluation.