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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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
Improvement Plans on Defect Consulting Report in an Apartment Building through Analyzing on Formal Index and Quantitative Index
Park, Jun-Mo ; Seo, Deok-Seok ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 195~206
DOI : 10.5345/JKIBC.2014.14.3.195
The main issue of defect dispute is consulting, reviewing, and finally judging as an arbiter. A defect consulting is represented a defect consulting report, but a business custom and a standard of judgment are different each consultants, and have many problems. This study reviews literature studies and institutional researches, set up a research structure. it has 7 indexes that 5 indexes are formal indexes, and the other are qualitative indexed. As a result of case study, formal indexes are respect on the whole. However, each appraiser has different ideas, and, is expected to delay on fixing a construction lawsuit practice. This study suggests to improve a defect consulting report, it is followed. In formal part, suggested to change configuration is adjusted and integrated similar items. In qualitative part, an evaluation system for appraiser and an education program for engineers is suggested.
Economic Analysis of a 5-Story RC OMRF Retrofitted with Modified Epoxy Mortar for Improving Seismic Performance
Kang, Suk-Bong ; Kwak, Jongman ; Shin, Dongwoo ; Son, Kiyoung ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 207~215
DOI : 10.5345/JKIBC.2014.14.3.207
As a reinforcement material for RC members, the modified epoxy mortar has been reported one of the superior materials since the material can improve the load capacity and the seismic performance of the RC members. However, there were few experimental studies and analytical research for improving seismic performance with the material. This study is to propose an effective reinforcement plan for RC Ordinary Moment Resisting Frame (OMRF) with the evaluation of seismic performance and economic analysis. For the objective, first, the load-deflection curve of a simple beam specimen was compared with the analytical results. Second, a 5-story RC OMRF structure was designed only for gravity load and the alternatives for seismic reinforcement were suggested. Third, pushover analysis was executed for evaluation of design coefficients and seismic performance of the structures. Finally, an effective reinforcement plan was suggested based on the results of quantity take-off and economic analysis. The findings of this study can be utilized as the basic data when the modified epoxy mortar is applied to practice for improving the seismic performance of RC members.
Bonding Properties of Steel-reinforced Polymer Cement Mortar Evaluated by Pull-off Test and FEM Modeling
Park, Dong-Cheon ; Yoneda, Nobutosi ; Cho, Bong-Suk ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 216~222
DOI : 10.5345/JKIBC.2014.14.3.216
Chloride attack to reinforced concrete structures located in seaside can cause a serious problem of durability and maintenance during the service life. Corrosion of reinforced steel bars in concrete decreases the bond strength and finally causes the detachment of concrete cover. Polymer cement mortar is usually adopted to repair the deteriorated RC structures because of its strong bonding property. The recovered load-carrying capacity after the repair was simulated by non-linear FEM analysis. The properties of concrete, repairing materials, bonding materials and reinforced bar were used as input data. Four types of redispersible polymer powders were used as components of polymer cement mortar. Pull-off tests were carried out to examine the bond properties such as rigidity and strength. Effects of a corrosion inhibitor and the loss of reinforced bars due to the corrosion were also considered in this study. FEM modeling and analysis were conducted to propose the universal model. Physical bonding in the relationship between repair materials and steel reinforced bar is more dominant than chemical bonding.
Fire Resistance Performance of High Strength Concrete with Fiber Types
Kim, Jeong-Jin ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 223~229
DOI : 10.5345/JKIBC.2014.14.3.223
In this study, the fire resistance of high strength concrete with organic fibers and polymer powder (PW) was investigated. Two types of the specimens of
sizes were prepared. As a result of the test, it was found that the fiber-to-PW mixing ratio of 1:1 achieved the highest fluidity. Further, it was found that the mixing ratios of PP 0.05% + PW 0.05%, PNY 0.05% + PW 0.05% was sufficient to protect the high strength concrete from spalling. For the mock-up specimens of
size, if the required amounts of fibers were added in the concrete. the concrete spalling was resisted. Likewise, in the case of the polymix (PM) together with PW, all the tested specimens were satisfactory for fire resistance performance.
Application of Powdered Waste Glasses and Calcium Carbonate for Improving the Properties of Artificial Lightweight Aggregate Made of Recycled Basalt Powder Sludge
Park, Soo-Je ; Lee, Sung-Eun ; Choi, Heebok ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 230~236
DOI : 10.5345/JKIBC.2014.14.3.230
This study was carried out to investigate the manufacturability of artificial lightweight aggregate as a way to recycle basalt powder sludge, which is a waste produced during the manufacturing process of basalt in Jeju. Powdered waste glasses and calcium carbonate are used to improve the characteristics of manufactured artificial lightweight aggregate. Especially, considering the complex factors of basalt powder sludge, powdered waste glasses, and sintering method, the amount of calcium carbonate is appropriate at the 9 wt.% in order to improve the intumescent of lightweight aggregate. Also, the amount of powdered waste glasses is effective with using less than 50 wt.% and applying the direct sintering method at the same time on decreasing the absorption of lightweight aggregate. Furthermore, in order to manufacture artificial lightweight aggregate of high quality with a low specific gravity and low water absorption, it is considered to be more effective to apply the direct sintering method after the surface of artificial lightweight aggregate is covered with powdered waste glasses.
Physical Properties of Artificial Interior stone Using Waste Resources
Yoo, Yong-Jin ; Lee, Sang-Soo ; Song, Ha-Young ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 237~243
DOI : 10.5345/JKIBC.2014.14.3.237
The environmental problem is serious due to global warming In a concrete industry, the effort to reduce the problem of the destruction of environment arising from the indiscriminate use of limestone that is the raw material of cement and aggregate and the exhaustion of resources are continually emphasized In this research, the waste porcelain and waste glass that are the natural aggregate substitute materials were mixed and were applied. In addition, the magnesia phosphate composite and fly ash are mixed with a cement substitute material and the properties of the artificial stone was examined. Density, water absorption, rate of aggregate on the surface, compressive strength, and flexural strength were performed. As a result of the test, it is that waste glass with 60% and waste porcelain with 70% are the most excellent mix to produce the artificial stone.
Developing User Interfaces of Mobile PMIS Modules Based on Technology Demand Analysis
Park, Kyung-Mo ; Lee, Hyun Woo ; Kim, Chang-Duk ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 244~251
DOI : 10.5345/JKIBC.2014.14.3.244
Project Management Information System (PMIS) has not yet fully met needs of the construction industry. Based on the deficiency of the current system, the present study performed a survey to identify a need for mobile PMIS in the industry. The survey revealed that most respondents expect the development of mobile PMIS would contribute to improving the productivity and efficiency of field operations. Based on the survey findings, this study proposes a suite of modules for mobile PMIS, which are focused on construction management, document management, schedule management, and field information management. Mobile PMIS would allow to access from the field through mobile devices by using tablet computers and smart-phones. The study also suggests that the effectiveness of the system can be enhanced by user interfaces that are customized for each module.
Effect of Calcium Sulfate Dihydrate (Gypsum) on the Fundamental Properties of Slag-based Mortar
Baek, Byung Hoon ; Han, Cheon Goo ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 252~258
DOI : 10.5345/JKIBC.2014.14.3.252
With the vision of `a low carbon green develop` various industrial by-products were used as replacement of cement, in order to reduce
emissions from the manufacturing process of cement. Blast furnace slag is one of the industrial by-products. Due to the similar chemical compositions to ordinary Portland cement, blast furnace slag have been widely used in concrete with minimum side effects. Hence, in recent years, alkali activated slag-based composites are extensively studied by many researchers. However, the alkali activator can cause a number of problems in practice. Therefore, in this study, an alternative way of activating the slag was investigated. To activate the slag without using an alkali activator, calcium sulfate dihydrate was chosen and mixed with natural recycled fine aggregate. Fundamental properties of the slag-based mortar were tested to evaluate the effect of calcium sulfate dihydrate.
Effects of Water-Repellent on the Physical Properties of Water Paint
Lee, Soo-Yong ; Nam, Gee-Yung ; Kim, Ji-Hyun ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 259~265
DOI : 10.5345/JKIBC.2014.14.3.259
This study is to analyze durability of water-repellent paints mixed with water-repellents as outer surface finishing materials, and evaluate its feasibility. General functions and water-repelling effects were tested, and the feasibility was evaluated based on the test results. The experimental results of heat conduction durability, air permeability, absorption, and bond strength suggested that water-repellent paints mixed with water-repellents were suitable for finishing materials. Considering overall general durability performances, stable mixing ratios were 2, 5, and 8%.
Correlation Analysis between Median Household Income and LEED-Certified Public Transportation Access
Han, Hee Su ; Kim, Boo-Young ; Park, Young Jun ; Son, Kiyoung ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 266~272
DOI : 10.5345/JKIBC.2014.14.3.266
The Leadership in Energy and Environmental Design (LEED) Green Building Rating System provides third-party verification for environmentally sustainable construction. But while LEED-certified buildings provide healthier work and living environments, Previous studies have shown that LEED certification does not provide any direct economic incentives to owners and developers. To address this issue, this study aims to investigate the economic benefits of LEED criteria. The objective of this study is to examine whether or not there is a significant correlation between median household income and the number of bus stops and light rail stations for a given parcel that meet LEED sustainable site criteria for public transportation access. The findings showed that the number of bus stops had a positive correlation with median household income, which means that more bus stops a given parcel had that met LEED criteria, the greater the median household income of a block group where the given parcel was located would be, though this positive correlation was very weak.
Modeling of temperature history in the hardening of ultra-high-performance concrete
Wang, Xiao-Yong ;
Journal of the Korea Institute of Building Construction, volume 14, issue 3, 2014, Pages 273~284
DOI : 10.5345/JKIBC.2014.14.3.273
Ultra-high-performance concrete (UHPC) consists of cement, silica fume (SF), sand, fibers, water and superplasticizer. Typical water/binder ratios are 0.15 to 0.20 with 20 to 30% silica fume. In the production of ultra-high performance concrete, a significant temperature rise at an early age can be observed because of the higher cement content per unit mass of concrete. In this paper, by considering the production of calcium hydroxide in cement hydration and its consumption in the pozzolanic reaction, a numerical model is proposed to simulate the hydration of ultra-high performance concrete. The heat evolution rate of UHPC is determined from the contributions of cement hydration and the pozzolanic reaction. Furthermore, by combining a blended-cement hydration model with the finite-element method, the temperature history in the hardening of UHPC is evaluated using the degree of hydration of the cement and the silica fume. The predicted temperature-history curves were compared with experimental data, and a good correlation was found.