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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 11, Issue 6 - Dec 2011
Volume 11, Issue 5 - Oct 2011
Volume 11, Issue 4 - Aug 2011
Volume 11, Issue 3 - Jun 2011
Volume 11, Issue 2 - Apr 2011
Volume 11, Issue 1 - Feb 2011
Selecting the target year
Evaluation of the Basic Properties of Concrete with Types of Cellulose Fibers
Park, Yong-Kyu ; Lee, Joo-Hun ; Jeon, In-Ki ; Kim, Hyun-Woo ; Yoon, Ki-Woon ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 419~425
DOI : 10.5345/JKIBC.2011.11.5.419
Topping concrete that is not reinforced with rebar to prevent poor tensile performance is vulnerable to cracking. In this study, jute, which is known to be an excellent natural fiber material for strengthening concrete performance, was compared with other cellulose fibers in terms of its capacity to reduce the cracking of concrete. As a result, it was found that compared with concrete using other fibers, concrete using jute fiber showed more than a 50 % reduction of plastic shrinkage crack resistance with the contents of 0.9 kg/
and 1.2 kg/
for. For impact strength tests, the final destruction of WF and PULP fibers took up to 5 times the number of falls, while jute has 10-18 circuitry, showing excellent ductility properties.
Estimation of Long-term Aging Compressive Strength Through Non-Destructive Testing of Concrete Structure Using Mineral Admixtures
Kim, Jeong-Sup ; Shin, Yong-Seok ; Lee, Chang-Hyun ; Lee, Seung-Jung ; Kim, Kwang-Seok ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 426~434
DOI : 10.5345/JKIBC.2011.11.5.426
Recently, the use of mineral admixtures in concrete has been studied in many laboratories, and been applied in the field. But the non-destructive testing equation proposed in Japan for normal strength concrete has been used to determine compressive strength, because there has been a lack of systematic research on the compressive strength of concrete using mineral admixtures. For this reason, it is essential to suggest a non-destructive testing equation to estimate the compressive strength of concrete using mineral admixtures. Therefore, this study made a cylindrical specimen and core tube specimen of concrete using a mineral admixture, and suggested a strength estimation of long-term age (4 years) through non-destructive and destructive tests. The results of the research are as follows. Comparing error rates between conventional suggested equations and this estimated equation shows some differences by age, but the error rate of this study was reduced to 0.3 %~115.0 % compared to conventional equations by re-bound hammering, 0.2 %~22.8 % by the ultrasound velocity method and 0.5 %~102.3 % by complex method. Accordingly, it is judged to be suitable for assessing the compressive strength of concretes using mineral admixtures.
An Experimental Study on the Heat Storage Properties of Phase Change Material Using Paraffin Sheets in Building
Ko, Jin-Soo ; Kim, Byung-Yun ; Park, Sung-Woo ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 435~441
DOI : 10.5345/JKIBC.2011.11.5.435
The life cycle assessment on greenhouse gas emission of reinforced concrete buildings shows that more than 70 percent of greenhouse gas that is discharged by a building is discharged in the building maintenance stage, including cooling and heating. To reduce the greenhouse gas emission, maintenance planning to minimize the energy consumption is necessary in the design stage. In this paper, two heat storage rooms are tested to save the air cooling energy of the buildings. The specimens are essentially identical, except that chamber A contained paraffin sheets as the finishing material, while the other, chamber B, served as a control. The test results show that chamber A with the paraffin sheets exhibited less temperature change than chamber B without the sheets when temperature was increased outside of the specimens. The heating energy was probably consumed in the phase change of the paraffin sheets, which can be useful for reducing energy consumption related to air cooling during the summer.
Quick Judgments of Properties of Fine Aggregate to Use the Electric Arc Furnace Oxidizing Slag
Lee, Hyung-Min ; Lee, Han-Seung ; Choi, Jae-Seok ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 442~451
DOI : 10.5345/JKIBC.2011.11.5.442
Blast furnace slag is recycled as a high value-added material, while steel slag is difficult to recycle or is recycled as a low-grade filler material due to its expansive characteristics. Its property is caused by the high content of free lime and instable steel oxides. Recently, an innovative and rapid cooling method for melting steel slag has been developed in Korea, which reduces free lime content to a minimum level and increases the stability of steel oxides. However, researches on the long-term stability are not sufficient so far. Therefore, this study, focusing on the electric arc furnace oxidizing slag in the steel slag, aims to investigate the properties of the steel slag aggregate, its long-term volume stability and the engineering strength of mortar, and using it as a fine aggregate. This study result indicated that it was possible for it to be used as concrete aggregate because the volume change of the steel slag appeared to be stable.
Development of Eco Cementitious Building Finishing Materials Modified with Bamboo Charcoal
Park, Dong-Cheon ; Kwon, Sung-Hyun ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 452~458
DOI : 10.5345/JKIBC.2011.11.5.452
Bamboo is representing environmentally friendly building finishing materials as proven in the former researches. The purpose of this study is to evaluate the application properties of cementitious materials modified with bamboo charcoal as building finish materials. Flow test in fresh condition was conducted to assess the workability. Compressive and bending strength were measured after harding. As the thermal properties, thermal conductivity and density were measured. The properties were surpassing over them in case of using the pine charcoal in every tests. The thermal conductivity of them increased with the modified ratio. After the modified ratio 50%, the thermal conductivity decreased. Insolation and absorption performance is due to the lower density by modification of bamboo charcoal.
Prediction Model Development of Defect Repair Cost for Apartment House according to Performance Data
Kim, Byung-Ok ; Je, Yeong-Deuk ; Song, Ho-San ; Lee, Sang-Beom ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 459~467
DOI : 10.5345/JKIBC.2011.11.5.459
The work of constructing apartment housing involves various fields of industry that are linked to each other, and is based on a design document prepared by multiple technicians and architects. Consequently, design errors, material flaws or faulty construction works can cause defects, which sometimes overlap with each other. Construction companies should repair any defects found in a completed building within a specified period of time, and to do this, should establish a business plan by efficiently predicting the cost of defect repair. As it is very difficult for companies to accurately predict the occurrence of defects, historical performance data is used as a base. For domestic apartment housing units, data on the cost of defect repair is insufficient, so there are hardly any methods that can be used to make precise predictions. Therefore, the intent of this study is to develop a model that can predict the cost of defect repair by supply type and area, based on historical performance data with ten years worth of post-completion.
RFID Technology Applications with PMIS for Managing RMC Truck Operations
Kim, Seung-Ho ; Kim, Sang-Yong ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 468~481
DOI : 10.5345/JKIBC.2011.11.5.468
This research presents a strategy and information system to manage the logistics of delivery ready mixed concrete (RMC) under the integrated environment of PMIS+RFID. PMIS is system tool and technique used in construction sectors to delivery information. Information that can be extracted electronically in real time is more valuable than data gathered and maintained manually. RFID technology can help to improve data accuracy through supply chains and by identifying products and objects at specific points through automatic identification. The objectives of these two implementations can be able to improve the efficiency of logistics management for RMC truck process, and to verify the technical and practical feasibility of PMIS+RFID application in construction industry. This may be realistic given the dynamics of daily activities on construction sites. This research is focused on examples on real world case study, applications and research theme related and connected to PMIS+RFID technology. It demonstrated that PMIS+RFID technology has been automatically implemented and has shown process information about the RMC truck and the overall status information about it, both quickly and accurately. As a result, the construction site where needs 300
pouring (50 RMC trucks) per day can be reduced total 250 minutes. Moreover, this time saving is related to the labour cost saving. From the case studies, RFID+PMIS system was proven in terms of effectiveness rather than current method.
Improvement of the PVC Window Frame Installation Method Integrated with Gangform and Field Applicability Analysis
Choi, Hyo-Sung ; Lee, Jeong-Ho ; Yoo, Huyn-Seok ; Kim, Young-Suk ; Han, Seung-Woo ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 482~500
DOI : 10.5345/JKIBC.2011.11.5.482
In apartment housing construction, window frame installation work, which is conducted after the structural framework, is very important, because its completion time directly affects the starting time of successive interior finishing works, as well as the overall construction period. Construction delays in interior finishing works might occur due to problems inherent to the conventional window frame installation method, such as the poor verticality of window frames, and the water leakage around them. The primary objective of this study is to analyze the problems of a `Gangform integrated PVC window frame pre-installation method` based on its pilot test results. Next, this study proposes an improved conceptual model that enables the end users to enhance the field applicability of this method in terms of productivity, time, and cost. The field applicability of the proposed `Gangform integrated PVC window frame pre-installation method` was also verified through a survey.
In-situ Production Analysis of Composite Precast Concrete Members of Green Frame
Lim, Chae-Yeon ; Joo, Jin-Kyu ; Lee, Goon-Jae ; Kim, Sun-Kuk ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 501~514
DOI : 10.5345/JKIBC.2011.11.5.501
Recently, there have been many cases in which the difficulty of repair and replacement of principal elements in the bearing wall structure for apartment buildings, which is a major part of apartment buildings in Korea, has led to the reconstruction of buildings rather than their remodeling. To address this problem, the Korea government now allows a floor area ratio of up to 20 %, and has relaxed the building height limits to encourage the use of a rahmen structure instead of a bearing wall structure. However, since reinforced concrete rahmen structures have many problems, including higher floor height and greater construction cost, a great deal of research into rahmen composite precast concrete structures have been conducted. Green Frame, one of the developed prototypes, is expected to provide economic benefits through in-situ production for precast concrete column and beam. For in-situ production of composite precast concrete members, a detailed plan for production, curing, and installation is needed. However, it needs to be confirmed that the space is sufficient to produce the precast concrete members on-site before planning those activities. Therefore, this study proposes in-situ production analysis of composite precast concrete members of Green Frame with the evaluation of structural safety and available area on the parking structure. The result of this study shows that the in-situ production of precast concrete members is possible through a case study.
Application of Accelerated Carbonation Reaction for Low Alkalinity of Recycled Aggregate
Lee, Jong-Chan ; Lee, Sae-Hyun ; Yoon, Sang-Hyuck ; Song, Tae-Hyeob ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 515~522
DOI : 10.5345/JKIBC.2011.11.5.515
As Construction and Demolition (C&D) debris increases every year, systems have been adopted to compel the use of recycled aggregate made from C&D debris, and the use of recycled aggregate in the construction field has increased. But environmental problems linked to the alkalinity of recycled aggregate have occurred, and a study on approaches to lower the alkalinity of recycled aggregate is needed. It was certified by this study that a large amount of recycled aggregate could be carbonated in the C&D debris midterm-treatment field. As a result, the density and the water absorption of recycled aggregate after carbonation reaction was improved, and pH of recycled aggregate was lowered from over 11 to 9.4. X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), and Thermogravimetry/Differential Thermal Analysis (TG/DTA) methods also indicated the carbonation of recycled aggregate.
Formwork System Selection Model for Tall Building Construction Using the Adaboost Algorithm
Shin, Yoon-Seok ;
Journal of the Korea Institute of Building Construction, volume 11, issue 5, 2011, Pages 523~529
DOI : 10.5345/JKIBC.2011.11.5.523
In a tall building construction with reinforced concrete structures, the selection of an appropriate formwork system is a crucial factor for the success of the project. Thus, selecting an appropriate formwork system affects the entire construction duration and cost, as well as subsequent construction activities. However, in practice, the selection of an appropriate formwork system has depended mainly on the intuitive and subjective opinion of working level employees with restricted experience. Therefore, in this study, a formwork system selection model using the Adaboost algorithm is proposed to support the selection of a formwork system that is suitable for the construction site conditions. To validate the applicability of the proposed model, the selection models Adaboost and ANN were both applied to actual case data of tall building construction in Korea. The Adaboost model showed slightly better accuracy than that of the ANN model. The Adaboost model can assist engineers to determine the appropriate formwork system at the inception of future projects.