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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 13, Issue 6 - Dec 2013
Volume 13, Issue 5 - Oct 2013
Volume 13, Issue 4 - Aug 2013
Volume 13, Issue 3 - Jun 2013
Volume 13, Issue 2 - Apr 2013
Volume 13, Issue 1 - Feb 2013
Selecting the target year
Characteristics of Lightweight Aggregate Concrete according to Freezing and Thawing Resistance Test Methods
Kim, Se-Hwan ; Kim, Sang-Heon ; Lee, Soo-Hyung ; Jeon, Hyun-Kyu ; Seo, Chee-Ho ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 202~208
DOI : 10.5345/JKIBC.2013.13.3.202
The method used to test lightweight aggregate concrete for its resistance to freezing and thawing is different in each country. In Korea, the method of KS F 2456 on normal concrete is adopted for lightweight aggregate concrete, while the testing method of ASTM C 330 lightweight aggregates for structural concrete is used in the majority of overseas countries. In this study, we identified differences between KS F 2456 and ASTM C 330 in terms of the testing method for freezing and thawing resistance, and we studied the influence of this on the freezing and thawing resistance of lightweight aggregate concrete. The results of this study were as follows: Blocked lightweight aggregates had a slight collapse of shape and lost weight by repeated freezing and thawing, but unblocked lightweight aggregates were badly collapsed. And while the freezing and thawing resistance tests of normal concrete showed similar results despite the difference in the KS and ASTM testing method, the results for lightweight aggregate concrete were very different. So the KS test method shows evaluation results that are much lower than the ASTM test method.
Direction of CM Services Defect Liability in the CM Contract
Cho, Young-Jun ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 209~217
DOI : 10.5345/JKIBC.2013.13.3.209
The execution of a construction project involves the engagement of many participants. Generally, the Authority uses CM to certify that the Work is built according to the contract documents. The CM work scope is expressed in the Construction Technology Management Act and its Regulation. The mandated and delegated CM services are limited to the construction period. If Contractor is required to repair a construction defect, the Contractor should bear the burden of the inspection service for the defect repair, because it is associated with him. Nevertheless, CM should submit a bond to provide the inspection and supervision service for the defect repair. These may result in conflict with each liability. Therefore, CM service in the law and regulation was investigated and analyzed in this study to classify the characteristics of CM contracts, and it was suggested that the CM liability for the inspection and supervision service for the defect repair should be reconsidered.
Hydration Properties of Low Carbon type Low Heat Blended Cement
Choi, Sung-Woo ; Ryu, Deuk-Hyun ; Kim, Hun-Sang ; Kim, Gyu-Yong ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 218~226
DOI : 10.5345/JKIBC.2013.13.3.218
Of construction materials, cement and steel are the representative material that carbon dioxide. to reduce carbon emissions in the use of these materials The purpose of this study is low heat type blended cement, which is manufactured using a amount of cement than ordinary low heat blended cement. Low heat blended cement, mixing ratio of 10%, was investigated hydration properties and adiabatic temperature of concrete. The study in order to activate the reaction mineral admixture, a separate source of CaO and
areneeded. gypsum and lime, it expected amount of cement, low-carbon low-heat blended cement could reduce the hydration heat concrete than currentlyused low heat blended cement.
Early Strength Development Properties of Concrete using Early Strength Improvement Type Cement
Park, Kyu-Yeon ; Kim, Yong-Ro ; Kim, Gyu-Yong ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 227~234
DOI : 10.5345/JKIBC.2013.13.3.227
In this research, early strength development performance of early strength improvement type ordinary cement which is economically feasible early strength cement(Type III), improved early strength ordinary cement(Type I), was estimated to derive minimum curing temperature and proper water to cement ratio according to cement for early strength development through examination of fresh concrete properties and compressive strength according to water to cement ratio curing
to suggest fundamental data for practical use of early strength concrete.
Properties of Polymer Modified Mortars Using Re-dispersible Polymer Powders
Bae, Sang-Chan ; Hyung, Won-Gil ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 235~241
DOI : 10.5345/JKIBC.2013.13.3.235
In this study, a mortar was produced using re-dispersible polymer powders that addresses the defects of aqueous polymer and improves the durability of cement mortar. Also, an attempt was made to examine the properties of polymer modified mortars using re-dispersible polymer powders by strength and durability tests between ordinary Portland cement mortars and polymer modified mortars mixed with aqueous dispersion. The test showed that strength and durability are improved considerably compared with ordinary Portland cement mortar, and the performance of aqueous polymer cement mortar was considerably improved. Accordingly, it is expected that high-quality prepackaged polymer modified mortars can be produced using re-dispersible polymer powders.
Effects of Intrinsic and Extrinsic Motivation Factors on BIM Acceptance
Lee, Seul Ki ; Yu, Jung-Ho ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 242~252
DOI : 10.5345/JKIBC.2013.13.3.242
Although many researchers and practitioners are in agreement about the potential applicability and benefit of BIM in construction, it is still unclear why BIM is adopted, and what factors enhance the adoption and implementation of BIM. As such, the mechanism of BIM acceptance and use remains in question. Therefore, this paper aims to identify the key factors affecting the acceptance of BIM in construction organizations, and to analyze the effect of intrinsic and extrinsic motivation factors on BIM acceptance. The key factors in BIM acceptance are identified through a literature review in TAM (Davis 1989) and related theories, and consolidated by interviews and pilot studies with professionals in the construction industry. Based on the factors, a questionnaire was designed and sent out to a total of 114 construction organizations in Korea, such as contractors, architects, and engineers. Using SPSS 12.0, the data was analyzed to determine the relationship between intrinsic and extrinsic motivation factors and BIM acceptance through multiple regression analysis. These findings will clarify what the highly prioritized factors are, and can also be used in an assessment tool for the performance of BIM utilization.
Evaluation of the Performance of the PVA Fiber Reinforced Inorganic Binder and Industrial By-products Building Board
Park, Jong-Pil ; Lee, Sang-Soo ; Song, Ha-Young ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 253~262
DOI : 10.5345/JKIBC.2013.13.3.253
The test on the mix of PVA fiber of low carbon inorganic composite as a cement substitute found it to be satisfactory in terms of flexibility and stiffness. The result of the evaluation of the properties of low carbon inorganic panel revealed that the absorptivity was low at 8 to 9%, which is lower than the KS value of 25%. Also, the test on non-combustibility and gas toxicity found that these factors satisfied the decision criteria. In the test on heavy metals discharges, Pb, Cd, Cr6+, Hg, and As were not detected. Regarding far-Infrared emissivity and formaldehyde emission, the substitute was found to be harmless to the human body. Therefore, if the issue of shrinkage, which is a disadvantage of inorganic composites, is addressed, it is judged that it is possible to develop a low carbon inorganic composite panel with better performance.
Causes of Change Orders in the Military Facility Construction Projects and Suggestions for Improvement
Lee, Kyoung-Han ; Choi, Jong-Soo ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 263~271
DOI : 10.5345/JKIBC.2013.13.3.263
Change orders have been widespread in both the private and public construction sectors. In particular, in the case of G2B (Government to Business) contracts, adjustment of contract price and/or schedule extension is a frequent occurrence due to change orders. To uncover the causes of change orders and suggest an appropriate strategy, this study analyzed 296 cases of change orders in military facility construction projects from 2008 to 2010. The analysis revealed that the major causes of change orders are users` additional requirements (28.38%), a change of finishing materials (23.99%), and change of footing type (17.57%), in that order. Building on the results of this analysis, the authors suggest plans for practical improvements. Specific recommendations include 1) reflect user requirements at the early stage, 2) minimize the use of additional budget due to change orders, and 3) reduce the process and time for contract amendment, among others. The results of this study may provide significant implications to those involved in military construction projects, particularly project owners (i.e., the Ministry of Defense) and contractors.
Development and Application of CFT without Fire Protection using High Performance Steel and Concrete
Hong, Seok-Beom ; Kim, Woo-Jae ; Park, Hee-Gon ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 272~281
DOI : 10.5345/JKIBC.2013.13.3.272
Concrete filled tube (CFT) columns, which consist of a steel tube filled with concrete, combine the benefits of the two materials. The steel tube provides a confining pressure to the concrete, while the local buckling of steel plate can be prevented by the concrete core. CFT columns also have a high fire resistance due to the heat storage effect of concrete under fire. For this reason, it is possible to develop CFT columns without fire protection measures. CFT columns without fire protection have many advantages, including quality control, cost reduction, better space efficiency and a shorter construction period. Due to these advantages, studies on the development of CFT columns without fire protection measures have been performed. However, CFT columns lose their bearing capacity under fire because the steel tube is exposed to the outside. As a result, the structure is collapsed, causing significant damage. In this research, we made a CFT column using high strength concrete (100 MPa) and high strength steel (800 MPa). We use steel fiber and nylon fiber with concrete to provide fire resistance. We perform the fresh concrete experiment and investigate the fire resistance of the CFT column (
) under loading. To investigate the effect of steel fiber on increasing fire resistance, we compare the fire resistance time according to the steel fiber. Through the test, it was found that the CFT specimen with steel fiber had better fire resistance performance than other cases.
The Mixing Control Range Selection of Concrete according to High Volume Mineral Admixture Replacement
Yang, Seong-Hwan ; Yoon, Gi-Won ; Hur, Kab-Soo ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 282~290
DOI : 10.5345/JKIBC.2013.13.3.282
In this study, the adjustment range of mixture factor with replacement mineral admixture was reviewed to secure the mixture change data of high volume concrete compared to general concrete. When changing the concrete mix to high volume concrete within the universal concrete mixing, the adjustment range of mixture to ensure optimum quality is as follows. Unit-water content is
downward. Fine aggregate ratio dropped by approximately 1% when W/B was reduced by 5%, and it is reduced by approximately 0.12% when there is a 5% increase in the total replacement rate. When the FA replacement rate was increased by 5%, the AE agent was approximately 20% to 30% higher compared with the conventional one. When the FA and BS replacement rate rose by 5%, W/B was reduced by about 1 to 4%.
Constructability and Economic Evaluation of Continuous Hoop Reinforcement Method
Kang, Su-Min ; Park, Sung-Woo ; Jang, Se-Woong ; Jin, Jong-Min ; Eom, Tae-Sung ; Park, Hong-Gun ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 291~305
DOI : 10.5345/JKIBC.2013.13.3.291
This paper presents the continuous hoop reinforcement method as a means to overcome the difficulty of rebar construction due to the seismic detail of lateral reinforcement. Because the continuous hoop has no seismic hook, and there is less interference during the rebar work, rebar quantities and construction time can be reduced. Since the details of column and beam continuous hoops are different from those of conventional lateral reinforcements, the construction method should be developed through mock-up tests. The length of the beam mock-up is 8m and the section size is
, the height of the column mock-up is 2.8m and 4m, and the section size is
. The length and the size are determined based on the elements that are generally used in reinforced concrete basement parking lots and office buildings. The results of the mock-up test showed that the quantities of rebar could be reduced by 20% and the time could be reduced by up to 40% compared with conventional lateral reinforcements.
Strategies for establishing sustainable safety inspection systems for existing multiple-unit dwellings in Korea
Park, Sang-Hoon ; Baek, Cheong-Hoon ;
Journal of the Korea Institute of Building Construction, volume 13, issue 3, 2013, Pages 306~320
DOI : 10.5345/JKIBC.2013.13.3.306
This study compares and analyses the existing safety inspection systems in Korea and Japan to establish and propose future safety inspection systems for multiple-unit dwellings in Korea. The results of the study are summarized below. First, the state of Korea`s current safety inspection systems and policies for multiple-unit dwellings are compared with the systems and policies in Japan. Second, the differences between the safety inspection systems of the two nations are presented, and the issues in Korea are addressed. Third, methods to establish future safety inspection systems for multiple-unit dwellings based on the systems in Japan are proposed for application in Korea.