Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Recycled Construction Resources Institute
Journal Basic Information
Journal DOI :
Korean Recycled Construction Resource Institute
Editor in Chief :
Volume & Issues
Volume 3, Issue 4 - Dec 2015
Volume 3, Issue 3 - Sep 2015
Volume 3, Issue 2 - Jun 2015
Volume 3, Issue 1 - Mar 2015
Selecting the target year
An Evaluation of Applicable Feature of Structural Member Using High Volume Fly-Ash Concrete
Kim, Gyung-Tae ; Yoo, Sung-Won ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 109~114
DOI : 10.14190/JRCR.2015.3.2.109
Recently, numerous studies were dedicated on the HVFA concrete using high volume CCPs. In initial studies, main topics are dependent on material properties of HVFA concrete, but several studies were dedicated on the structural behavior of HVFA concrete such as elasticity modulus, stress-strain relationship and structural behavior nowadays. Therefore, in this paper, on the basis of recent studies on the structural behavior, 2 large-scale test members were manufactured with 7.5m span length and fly ash replacement ratio 50%, concrete compressive strength 50MPa in order to apply to the practical structure and evaluate possibility of application. From the test results, although there were small differences between test results and existing research results on the stress-strain relationship, the application to practical structure is not hard. In flexural test, as the produced pattern of displacement and strain were similar to those of general concrete without fly ash, the difference between 50% fly ash concrete and general concrete is very small. And the concrete shear strength obtained by test was similar to that of design code, so existing design code will be also able to apply.
Design Approach of Concrete Structures Considering the Targeted CO
Jung, Yeon-Back ; Yang, Keun-Hyeok ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 115~121
DOI : 10.14190/JRCR.2015.3.2.115
The objective of this study is to present the design approach of low
concrete structures for reduction of
emissions. The design approach was implemented considering the system boundary for each processing presented in the ISO 13315-2. As for life-cycle inventory(LCI) for
assessment of concrete structures, data provided from domestic LCI DB was used. Based on the process presented in this study, case studies on the life-cycle
assessment of shear wall concrete structure was conducted. As substitution level of GGBS is 25%, the amount of
uptake by concrete carbonation was decreased in the material, demolition and crushing, and transport phase. The amount of
emissions of column and total member was decreased by 26% and 22% respectively, compared to that of OPC.
Property Analysis of Waterproofing and Corrosion-Resistant Performance in Concrete Water Supply Facilities
Kwak, Kyu-Sung ; Ma, Seung-Jae ; Choi, Sung-Min ; Oh, Sang-Keun ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 122~131
DOI : 10.14190/JRCR.2015.3.2.122
The purpose of this study is to understand the necessity for waterproofing and corrosion-resistant technique application on concrete water tank used in water supply. Relevant research materials and regulation were collected, reviewing for the case studies of sample structures aged over 20 years, and experimental studies on chloride conduction for the high performance concrete and penetration properties of water repellency of liquid type materials. The result is that the concrete water tank in the water supply is needed for waterproofing and corrosion-resistant material coating to maintain long term durability due to the constant environmentally induced degradation deterioration often caused by chloride attack.
Effect of the Amount of Attached Mortar of Recycled Aggregates on the Properties of Concrete
Lee, Won-Ki ; Choi, Jong-Oh ; Jung, Yong-Wook ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 132~139
DOI : 10.14190/JRCR.2015.3.2.132
In this study, the different unit cement content by the ratio of water absorption and water-cement ratio are applied to examine the properties of the concrete used the aggregate recycled by the crushing treatment. According to the experimental results, in the mix of low strength and high water-cement ratio, both of the compressive strength is almost equal in the concrete using the recycled aggregate by the crushing treatment and the concrete using broken stones. It means that the recycled aggregate has the low effect of the amount of bonded mortar. But, in the mix of high strength and low water-cement ratio, the concrete using the recycled aggregate by the crushing treatment has 40% less of the compressive strength than that using broken stones by the effect of the amount of bonded mortar. On the other hand, after 8 weeks, the dry shrinkage of the recycled aggregate with 7% of the ratio of water absorption doubles that of the broken stones with 1% (
), in other words
. Thus, the dry shrinkage should be prior to any other conditions in recycling waste concrete for the aggregate for concrete. When the recycled aggregate with 3% of the ratio of water absorption is used, the compressive strength of the rich mix concrete (
of the unit cement content) is equivalent to that of the concrete using broken stones, while in using the recycled aggregate with 7% of the ratio of water absorption, the rich mix concrete has 7% lower compressive strength than the concrete using broken stones. But, the compressive strength of the ordinary mix concrete (
of the unit cement content) is far lower than that using broken stones.
Adsorption Technology for Bacteria-Based Concrete Coating
Jeong, Jae-Eun ; Yang, Keun-Hyeok ; Yoon, Hyun-Sub ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 140~145
DOI : 10.14190/JRCR.2015.3.2.140
This study focused on the development of a fundamental technology for coating of concrete surface using slime produced from bacteria. To assign self-purification ability and improve durability performance of concrete, Rhodobater capsulatus that generates slime were selected and absorption technology for the selected bacteria was then examined. From the production of slime and growth activity of the bacteria, the optimum medium for Rhodobater capsulatus can be recommended as maltose. Furthermore, image analysis showed that high porous resin powder is more effective for absorption of the Rhodobater capsulatus than the other materials tested.
Quality Improvement of Recycled Fine Aggregate by Neutralization Reaction in Water
Kim, Ha-Suk ; Kim, Jin-Man ; Sun, Joung-Soo ; Bae, Kee-Sun ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 146~151
DOI : 10.14190/JRCR.2015.3.2.146
Recycled aggregate by the recycling construction waste has a lot of advantage such as the developing the alternative resource and protecting of environment. However, recycled aggregate is used as the low quality grade, because it is difficult to remove old mortar from aggregate. To use the recycled aggregate as high quality grade, it is important to develop the technology to produce the high quality recycled aggregate. To manufacture the high quality recycled aggregate, old mortar attached on the aggregates should be removed efficiently. Therefore, in this study, we suggested the optimum condition to remove old mortar effectively using sulfuric acid and low speed wet rotary mill for high quality recycled fine aggregate. The results shows that the recycled aggregate satisfy on the standards of KS F 2573 in density, absorption and solid volume, when adequate condition of sulfuric mole ratio and aggregate ratio are make.
Physical Effect of Adding Stone Dust Sludge on the Properties of Cement Mortar
Seo, Jun-Yeong ; Choi, Seon-Jong ; Kang, Su-Tae ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 152~158
DOI : 10.14190/JRCR.2015.3.2.152
In order to investigate the feasibility of stone dust sludge as fine aggregate, an experimental study was performed on cement mortar with stone dust sludge. fresh mortar properties and strength with various stone dust sludge replacement ratios were estimated. the replacement ratio adopted in this study was 0, 10, 20, 30%. Flow, air content, and rheological properties were considered as properties of fresh mortar. Compressive strength and flexural tensile strength were measured for strength. The results are as follows. Higher amount of stone dust sludge caused reduction in slump and air content. In the rheological properties, both yield stress and plastic viscosity increased as stone dust sludge content increased up to 20% replacement ratio, but there were no remarkable difference between 20 and 30%. Yield stress increased drastically between 10 and 20%. Compressive and flexural tensile strength results indicated that the strength variation was not significant according to stone dust sludge content, but the strength gain in the early age by adding stone dust sludge was evident. the strength at the age of 28 days however did not show noticeable effect of adding stone dust sludge.
Effect of Reinforcing Bar on Rayleigh Wave Propagation on Concrete Structures
Kim, Jae-Hong ; Lee, Kang-Wook ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 159~164
DOI : 10.14190/JRCR.2015.3.2.159
This paper presents results on a study of the Rayleigh wave scattering in concrete with a steel bar using transient elastic waves. To study the characteristics of the scattered waves induced by a steel bar in concrete, a three-dimensional finite element method was adopted. A case for elastic wave propagation parallel to the steel bar is discussed. The effect of the cover thickness and steel bar diameter on the Rayleigh wave was studied. To confirm the numerical investigations, a concrete specimen containing a steel bar was made, and corresponding transient elastic wave experiments were conducted. It is believed that the result of this study can serve as an important reference in a nondestructive evaluation of concrete with a steel bar.
Thermal Behavior of a Pipe-Rack Structure Subjected to Environmental Factors
Lee, Jong-Han ; Lee, Jong-Jae ; Kim, Sung-Yeon ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 165~170
DOI : 10.14190/JRCR.2015.3.2.165
Pipe-rack structures supporting high temperature and pressure are of great importance to ensure the safety of the operation of the plants. If some damage occurred in the pipe-rack structure, the facilities not only bring damage to the commercial property, but also result in economic losses. Specially, since pipe-rack structures are exposed to various environmental conditions, it is essential to evaluate the thermal behavior of the structure caused by environmental conditions for the appropriate design and maintenance of the pipe-rack structure. Thus, based on a selected, typical pipe-rack structure, a thermal-stress coupled analysis was conducted to evaluate the temperature distributions and thermal stresses of the structure. For this, this study accounted for the operating condition of the pipe and the effect of environmental conditions, Yeosu in South Korea and Saudi Arabia in the Middle East. The results of the study showed the need for accounting for a variance in the environmental factors to evaluate the thermal behavior of the pipe-rack structure along with the working condition of pipe.
A Study on Fundamental Properties of Rapid Cooling Slag to Utilize as Fine Aggregate for Concrete
Choi, Yun-Wang ; Choi, Byung-Keol ; Oh, Se-Wang ; Cho, Bong-Suk ;
Journal of the Korean Recycled Construction Resources Institute, volume 3, issue 2, 2015, Pages 171~179
DOI : 10.14190/JRCR.2015.3.2.171
Recently, development of substitution aggregate is urgently needed because aggregate shortage is continuing due to the exhaustion of natural aggregate and strict restrictions of environment in construction industry. Therefore, In this study, new processing method to solve the problems of processing method of existing converter slag, namely, rapid cooling slag produced by the rapid cooling and crushing process of the high temperature melten slag into the rotary drum and then using the cooling water, compressed air and steel ball was examined fundamental properties for utilize as fine aggregate for concrete. In addition, through this study, we propose the utilization method of rapid cooling slag as fine aggregate for concrete.