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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 14, Issue 6 - Dec 2014
Volume 14, Issue 5 - Oct 2014
Volume 14, Issue 4 - Aug 2014
Volume 14, Issue 3 - Jun 2014
Volume 14, Issue 2 - Apr 2014
Volume 14, Issue 1 - Feb 2014
Selecting the target year
Prediction of Pumping Friction Resistance Coefficient in Pipe Influenced by Concrete Rheology Properties
Kim, Hyung-Rae ; Cho, Ho-Kyoo ; Kim, Jung-Chul ; Lee, Kewn-Chu ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 118~126
DOI : 10.5345/JKIBC.2014.14.2.118
The establishment of the technology for evaluating friction resistance and pipe pressure and the relation of the fluid characteristics and pumpability of concrete is essential for concrete pumping performance for the rapid construction of super-tall buildings. In this study, a quantitative evaluation of concrete fluid characteristics and surface friction resistance was performed, applying different concrete mix proportions and pumping conditions. To achieve this, we developed a temporary horizontal pumping evaluation system to measure pipe pressure and surface friction characteristics, and performed an experiment to investigate the relations between concrete rheology characteristics and friction resistance in pipe. The experiment found that in terms of the rheology characteristics, plastic viscosity was reduced remarkably after pumping. As well, high regression between the surface friction and pressure gradient was confirmed. This means that it is possible to evaluate the friction resistance between concrete and pipe by means of a pumping system that includes a frictional resistance testing pipe. In addition, high regression between the plastic viscosity of concrete after pumping and friction resistance coefficient was confirmed. Finally, it is considered that pumping pressure can be predicted using the friction resistance coefficient derived in this study, and it has high regression.
A Study on the Construction Performance of Curtain Wall Systems Using Fire-Resistant & Light-Weight Inorganic Composite Foam Board
Koo, Young-Ah ; Kim, Seong-Eun ; Oh, Chang-Won ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 127~134
DOI : 10.5345/JKIBC.2014.14.2.127
This study had the goal of analyzing the economic feasibility and constructability of a fire resistant curtain wall system using Light-weight Inorganic Composite Foam Board(LI-CFB). LI-CFBs, new materials with excellent fire resistance are being developed for use as the back panel of curtain wall and their fire resistance has already been analyzed through actual tests in earlier studies. In this study, a mock-up test involving the installation of the fire resistant curtain wall system on an actual building was conducted, and the system was compared with a common curtain wall system. This system is applied in the same way as a common curtain wall system. But the cutting LI-CFBs, which are brought from a factory, are used in the system and attached on the frame (mullion and transom). Even though the system requires more working time than the existing system, the LI-CFBs back panels are easy to cut and do not produce dust. Also, the panels are able to be assured the quality by checking damaged parts easily. Besides having a high level of fire resistance, the system's economic feasibility and constructability meets or exceeds those of the existing system.
Effects of Sugar and Hydrated Cement Powder on the Reduction in Heat of Hydration
Moon, Hoon ; Kim, Ji-Hyun ; Cho, Yong-Hun ; Lee, Jae-Yong ; Chung, Chul-Woo ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 135~142
DOI : 10.5345/JKIBC.2014.14.2.135
The heat of hydration can be reduced through the use of retarding agents. Typical retarding agents include sugar and glucose. However, these significantly delay the setting of cement paste. For the efficient use of sugar and glucose for mass concrete construction, it is necessary to develop a technique that can provide a setting behavior equivalent to that of plain concrete. In this work, the temperature rise of cement paste was monitored with the addition of various retarders including sugar and glucose. Hydrated cement powder was made with a water to cement ratio of 5 in order to accelerate the retarded cement pastes. It was found that the addition of hydrated cement powder in retarded pastes reduced the maximum temperature of cement paste. The use of hydrated cement powder could also successfully reduce the time to reach the maximum temperature.
A Study on the Fire Resistance and Sound Insulation Performance of Apartment House Interior Finish Wall Lightweight Drywall
An, Jae-Hong ; Yeo, In-Hwan ; Kim, Kyoung-Woo ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 143~149
DOI : 10.5345/JKIBC.2014.14.2.143
Recently, the structure system for apartment buildings in Korea has been changing from wall to post-beam structure. This study examines the fire resistance and sound insulation of light-weight dried wall, a component of post-beam structure. For the fire resistance and sound insulation in Korea, the Compartment wall of apartment house in the case of building regulation has regulations specify the detailed requirement of fire compartment walls in apartment, but do not specify that of interior walls. This study proposes the fire resisting rate of the interior wall into three grades in which the highest grade requires fire resistance of 30 minutes and also proposes the requirement of sound insulation performance into three grades in which the lowest grade requires 35dB.
Factors Influencing the Work Ability of Building Construction Field Managers
Shin, Jung-Hyun ; Lee, Woo-Hwan ; Choi, Young-Wha ; An, Sung-Hoon ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 150~155
DOI : 10.5345/JKIBC.2014.14.2.150
The success of construction projects is heavily dependent on the work ability of the field managers who manage the execution of projects. The work ability of field managers is influenced by various elements such as job stress and individual characteristics. The purpose of this study is to reveal the factors influencing the work ability of construction field managers in Korea. Work ability is evaluated bases on the Work Ability Index(WAI) developed by the Finnish Institute of Occupational Health, while job stress is measured using the Korean Occupational Stress Questionnaire Short Form developed by the Korean Occupational Safety & Health Agency. The results showed that field managers under higher job stress have lower work abilities. In addition, it is revealed that exercise or religious practice have a positive influence on work ability. This study will help to increase the work ability and enable the efficient management of organization at building construction sites.
A Study on the Development of Non-PC High-Early-Strength Concrete Without Steam Curing
Jun, Woo-Chul ; Lee, Ji-Hwan ; Park, Hee-Gon ; Lee, Jae-Sam ; Kim, Kyung-Min ; Cho, In-Sung ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 156~162
DOI : 10.5345/JKIBC.2014.14.2.156
This study aims to develop a rapidly hardening type of concrete to achieve the removal of form intensity (more than 10MPa) using the method of curing at room temperature in order to solve some economic environmental problems by omitting the steam curing process involved in producing PC (Precast Concrete). Therefore, this study evaluated a rapidly hardening cement containing a high amunt of C3S, which is very responsive in expressing early intensity, and a rapidly hardening type of concrete which uses some hardening accelerator to increase thehydration reaction of
. The results of the experiment on concrete using some hardening accelerator are asfollows. In the slump flow experiment for identifying the liquidity and the air test, the desired values were met. The compression strength showed rapid expression response by 12 hours, and met the desired value within 6~9 hours. Its drying shrinkage value and Autogenous shrinkage value were measured as below (
),and satisfied the requirements. In addition, in the Semi-Adiabatic Temperature Test, it was found that the concrete rose to its peak temperature within 24 hours and then its temperature dropped.
Constructability of a Waterproofing Sheet Joint Combining an Aluminum Thin-film and Viscosity Layer Using a High-frequency Inductive Heating Apparatus
Chang, Sang Mook ; Kim, Yun Ho ; Choi, Sung Min ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 163~169
DOI : 10.5345/JKIBC.2014.14.2.163
Engineers in the construction field have been using bonded waterproofing sheets in an attempt to resolve the imbalance in the quality, the risk of fire, safety of workers, and environmental pollution, as well as to eliminate separate use of organic adhesives on the surface of concrete. Recently, self-laminated waterproofing sheets have been developed. The purpose of this research is to find an appropriate processing speed according to the changes in physical properties, and visual observation of the waterproofing sheets laminated by the aluminum thin-film and viscosity layer that can be attached through self-adhesiveness on the surface of concrete and waterproofing sheets. Therefore, this research is conducted using a physical performance test. Based on the result of the test, when the high-frequency inductive heating apparatus was used, an improved adhesion and bonding stability effect were confirmed after the anti-hydrostatic pressure and bond strength in the temperature condition, and the surface observation in the processing speed condition.
Stress-Strain Relationship of Alkali-Activated Hwangtoh Concrete under Chemical Attack
Mun, Ju-Hyun ; Yang, Keun-Hyeok ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 170~176
DOI : 10.5345/JKIBC.2014.14.2.170
This study examined the effect of chemical attack on the stress-strain relationship of alkali-activated Hwangtoh concrete. Water-to-binder ratio and air content were selected as mixture parameters. The stress-strain relationship of concrete was measured at chemical immersion times of 0, 7, 28, 56, and 91 days from an age of 28 days. Based on the test results, the reduction in compressive strength of alkali-activated hwangtoh concrete owing to chemical attack was formulated. In sddition the present study demonstrated that the stress-strain behavior of concrete under chemical attack is significantly dependent on the air content and chemical immersion time, indicating the rate of decrease of modulus of elasticity was greater than that of compressive strength at the same immersion time. As a result, the stress-strain behavior of concrete under chemical attack was significantly inconsistent with the conventional models specified in the CEB-FIP provision.
Development of Hierarchical Checking Tables for Safety Management of Apartment Gang-form Works
Kang, Jung-Woo ; Cho, Dong-Hyun ; Koo, Kyo-Jin ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 177~186
DOI : 10.5345/JKIBC.2014.14.2.177
The gang-form widely used in apartment construction sites has advantages compared to scaffolding in preventing falling accidents. One problem, however, is that safety accidents associated with gang-form works repeatedly occur due to worker carelessness. In this study, hierarchical checking tables are provided to support safety management activities for the gang-form works at the sites. Through a survey of experts and analyses of case studies of construction accidents, 137 safety check items are classified by participant type based on a hierarchical safety check scheme. The applicability and effectiveness of the hierarchical checking tables was evaluated through interviews with experts. It was found that the hierarchical checking tables enabled each gang-form related participant to check his own safety management items, and provided a level-wise structure to site safety management systems.
Study on CO
Emission Reduction Effects of Using Waste Cementitious Powder as an Alternative Raw Material
Park, Dong-Cheon ; Kwon, Eun-Hee ; Hwang, Jong-Uk ; Ahn, Jae-Cheol ;
Journal of the Korea Institute of Building Construction, volume 14, issue 2, 2014, Pages 187~194
DOI : 10.5345/JKIBC.2014.14.2.187
With environmental regulations continuously being strengthened internationally the need to control environmental pollution and environmental load is emerging in Korea. The purpose of this study is to seek methods or using waste cementitious powder as an alternative raw material for limestone through the optimization of raw material and to quantitatively analyze the resulting reduction of
emission in order to contribute to solving the issue of waste, which is the biggest issue in relation to construction and global warming. The results of the study, show that waste cementitious powder can be used as an alternative raw material for limestone at OPC level, but it was also found that mixing fine aggregate cementitious powder into waste cementitious powder significantly affected the substitution rate for limestone with waste cementitious powder and the reduction of greenhouse gas. In particular, when fine aggregate cementitious powder was used at a rate of 0~20%, the substitution rate for limestone and the reduction in the rate of greenhouse gas emission was significantly reduced. It is thought that a technique to efficiently separate and discharge the fine aggregate cementitious powder mixed in waste cementitious powder needs to be developed in the future.