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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 15, Issue 6 - Dec 2015
Volume 15, Issue 5 - Oct 2015
Volume 15, Issue 4 - Aug 2015
Volume 15, Issue 3 - Jun 2015
Volume 15, Issue 2 - Apr 2015
Volume 15, Issue 1 - Feb 2015
Selecting the target year
Effect of the Replacement Ratio and Sources of Blast Furnace Slag Powder on the Fundamental Properties of Recycled Fine Aggregates Based Mortar
Han, Cheon-Goo ; Zhao, Yang ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 257~263
DOI : 10.5345/JKIBC.2015.15.3.257
In this study, the quality of blast furnace slag and the engineering properties of recycled aggregate based mortar with variable replacement of blast furnace slag have been focused. Blast furnace slag(BS) manufactured in various areas in Korea were prepared for this study. For the investigation results, 4 types(among the all of 9 types) of the experimental results were identified as below the standard level when using blast furnace slag chosen from different factories. Especially the particle size of the blast furnace slag was considered as the largest problem. When using BS in the recycled aggregates based mortar, the increase amount of blast furnace slag, increased the fluidity but delayed the setting time and decreased strength at early age. Based on the relationship of the amount of BS and the engineering properties of mortar, this study found that the amount of
and L.O.I affect the setting time, 3 days strength and 91 days strength to the certain standard level.
Effect of Powder Hardening Accelerator on the Physical Properties of Precast Concrete
Jun, Woo-Chul ; Seo, Hwi-Wan ; Bae, Yeoun-Ki ; Park, Hee-Gon ; Min, Tae-Beom ; Kwon, Yeong-Ho ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 265~271
DOI : 10.5345/JKIBC.2015.15.3.265
This study is intended to produce a PC (Precast Concrete) member without a steam curing process in developing the high early strength concrete satisfying the condition of 10MPa in compressive strength at the age of 6 hours, and is intended to ensure economic feasibility by increasing the turnover rate of concrete form. Hence, high early strength cement with high
content and the hardening accelerator of powder type accelerating the hydration of
was used. And the properties of concrete were evaluated according to the hardening accelerator mixing ratio (0, 1.2, 1.6, 2.0). No big difference was found from the tests of both slump and air content. When 1.6 % or higher amounts of the hardening accelerator were mixed, the compressive strength of 10MPa was achieved at the age of 6 hours. From the test results of autogenous (drying) shrinkage and plastic shrinkage, it can be seen that there was a difference according to hydration reaction rate due to the addition of the hardening accelerator. However, it was shown that no problem arose with crack and durability. And it was shown that resistance to freezing-thawing, carbonation, and penetration were excellent.
An Experimental Study on the Ensuring the Fire Resistance Performance of Non-Refractory Coating CFT
Lee, Ji-Hwan ; Han, Min-Cheol ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 273~280
DOI : 10.5345/JKIBC.2015.15.3.273
In this study, tests were carried out to find out a method to ensure the fire resistance performance of high-performance non-refractory coating CFT columns. For the high performance concrete fabrication with 100MPa, blast furnace slag(BS) and steel and nylon fibers were used. It was found that the partial replacement with BS improved the fire resistance performance of the concrete. Based on the results of lab tests, the large fire test was conducted. For this test, the CFTs with the size of
and the reinforcement of SS 400 steel were prepared and they were subjected to a loading condition. It was found that as the level of load increased, the level of fire resistance decreased. For example, In with the loading condition of 2000kN the CFT could resist the fire for over 240 minutes, whereas, with the loading condition of 3,000kN and 4000kN applying to equivalent CFTs, the resisting time against fire were 184 minutes, and 120 minutes, respectively.
Properties of Cement Paste Containing High Volume γ-C
S and MgO Subjected to CO
Sung, Myung-Jin ; Cho, Hyeong-Kyu ; Lee, Han-Seung ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 281~289
DOI : 10.5345/JKIBC.2015.15.3.281
Carbonation of concrete causes reduction of pH and subsequently causes steel corrosion for reinforced concrete structure. However, for plain concrete structure or PC product, it can lead to a decrease in porosity, high density, improvement of concrete, shrinkage-compensation. Recently, based on this theory, research of
curing effect has been performed, but it was mainly focused on its effects on compressive strength using only ordinary portland cement. Researches on
curing effect for concrete containing
reactive materials such as
, MgO haven't been investigated. Therefore, this study has performed experiments under water-binder ratio 40%, and the replacement ratios of
and MgO were 90%. Micro-chemical analysis, measurement of compressive strength according to admixtures and
curing were investigated. Results from this study revealed that higher strength was measured in case of
curing compared with none
curing for plain specimen indicating difference between 1.08 and 1.26 times, in case of
90, MgO 90 specimen, incorporating high volume replaced as much as 90%, it was proven that when applying
curing, higher strength which has difference between 14.56 and 45.7 times, and between 6.5 and 10.37 times was measured for each specimen compared to none
curing. Through micro-chemical analysis, massive amount of
and decrease of porosity were appeared.
The Correlation between Rheological Properties and Pumpability of High Performance Concrete from High-Rise Pumping Monitoring
Kim, Gyu-Dong ; Han, Cheon-Goo ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 291~297
DOI : 10.5345/JKIBC.2015.15.3.291
In this study, the evaluation and the analysis of the correlation between rheological properties and pumpability of high performance concrete, C80A which was applied to the height of from 200 m to 350 m in a super tall building, was carried out by measuring pumping pressure and flow rate, testing concrete properties at before and after pumping. As the results, C80A had satisfactory properties of fresh and hardened concrete to the requirements even after pumping and the maximum pumping pressure showed increase of 10~15% at every 50m higher pumping and the average flow rate showed the above
per hour which means proper productivity. Additionally it was verified that pumping pressure and friction factor in pipeline are inversely proportional to slump flow and showed a tendency to increase according to the higher T-500 value.
Effect of VAE Type Powder Polymer on Strength Properties of High Strength Polymer Cement Mortars
Choi, Jung-Gu ; Lee, Gun-Cheol ; Ko, Kyung-Taek ; Ryu, Gum-Sung ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 299~306
DOI : 10.5345/JKIBC.2015.15.3.299
In construction materials area, many research on polymer for cement-based materials have been conducted. In spite of these research, general research scope is limited to the normal strength range, and thus in this research, for both normal and high strength range mixtures, the strength and mechanical properties of high strength cement mortar incorporating Vinyle Acetate-Ethylene(VAE) type powder polymer are evaluated. As a result of experiment, in the case of high strength mixture, as the amount of VAE polymer addition was increased the compressive and flexural strengths were decreased while the tensile and bonding strengths were increased because of the formation of the polymer membrane inside of the mortar matrix.
Cost Estimating Method of Public Building Construction through Construction Scale
Yim, Jin-Ho ; Park, Jun-Mo ; Kim, Ok-Kyue ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 307~316
DOI : 10.5345/JKIBC.2015.15.3.307
As there are a lot of differences in the public building construction cost depending on the construction scale of actual construction cost system, a lot of problems occur in the estimation of the cost. So, the development of a predictive model depending on the construction scale shall be used in a way that it is applied to the case selectively and differently. This study drew a cost estimating model through a regression analysis. For this, 42 construction sites which were ordered during 2011 to 2012 by Public Procurement Service data were selected as a historical data. Based on the application of the model to new construction and the verification of its effect, the reasonable model for estimating the construction cost has been suggested.
Automated Algorithm to Convert Coordinates of Space Representation using IFC-based BIM Data
Kim, Karam ; Yu, Jungho ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 317~327
DOI : 10.5345/JKIBC.2015.15.3.317
Many construction projects have extensively adopted building information modeling (BIM), and various institutions and standards have been developed domestically in Korea. However, the current process that is used to calculate building space area has a significant shortcoming in that there are two different laws to apply the method of measurement considering space boundaries for building element guidelines. For example, space area can be calculated by a polygon, which is modeling using a BIM-based computer aided design program, such that the space polygon is always exported as an inner-edge type. In this paper, we developed an automated algorithm to convert coordinates of space representation using industry foundation classes based BIM data. The proposed algorithm will enable engineers responsible for space management to use a BIM-based model directly in the space programming process without having to do additional work. The proposed process can help ensure that space area is more accurately and reliably.
Drawing Segmentation Module for Management of Building Finish Details
Koo, Kyo-Jin ; Park, Hyung-Jin ; Joung, Jin-Hyun ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 329~337
DOI : 10.5345/JKIBC.2015.15.3.329
Drawings in construction industry are an aggregation of knowledge containing various information generated in a number of projects. Finish details are generated by architects when they select details and methods of construction by spaces or elements. However it is so difficult to re-use details in existing drawing management systems because there are so many details in a sheet and there are several many kinds of sheets in a file. In this paper, a drawing segmentation algorithm is suggested for managing building finish details individually. Based on this algorithm, a system module for making detail blocks from files of finish details is developed. Using the drawing segmentation module, interfaces of drawing management system are suggested in the paper. Management of individual detail blocks helps to reduce of the time for searching and increases productivity of designed drawings. Also it would contribute to increase quality of designed drawings by reusing of knowledge in detail blocks.
Comparative Performance Analysis of Robot-based Automated Construction System Using a Real Scale Test Project
Lee, Ung-Kyun ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 339~349
DOI : 10.5345/JKIBC.2015.15.3.339
A large-scale research project to develop a robot-based automated building construction system for steel structures was successfully conducted in South Korea. This paper discusses the results of the real-scale test and the key lessons gained from the testing process. The system was assessed in terms of system productivity, construction cost, quality control, and safety improvements. While the productivity of the automated system showed an improvement of about 9.5%, the construction cost was about six times higher than that of the conventional method. The field test also indicated that the automated system requires more on-site quality control measures. However, because the system can eliminate the causes of various safety accidents, safety levels might be expected to be improved significantly. It is expected that this paper will provide knowledge and insight for developing new systems, and the results of the real-scale test might be useful for other researchers and similar research projects in the future.
Effect of Mixing Method on Mechanical Properties of Fiber Reinforced Concrete
Kim, Hyun Wook ; Lee, Chang Joon ;
Journal of the Korea Institute of Building Construction, volume 15, issue 3, 2015, Pages 351~357
DOI : 10.5345/JKIBC.2015.15.3.351
Fiber reinforced concrete (FRC) has been successfully used to enhance the flexural toughness of concrete. As fibers are randomly oriented in FRC, they sometimes produce clumps that reduce the mechanical performance, and a properly chosen mixing protocol can be a way to minimize this problem. In this research, the effects of mixing method on the mechanical properties of FRC were investigated. The compressive strength, flexural strength, and flexural toughness were measured using three different mixing methods. It was shown from the results that the compressive strength and peak flexural load were not affected by changes in mixing method. However, in terms of flexural toughness, the changes in mixing method clearly affected the flexural toughness of FRC. The truck-mixed FRC outperformed two pan-mixed FRCs.