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 Institute of Resources Recycling
Journal Basic Information
Journal DOI :
The Korean Institute of Resources Recycling
Editor in Chief :
Volume & Issues
Volume 18, Issue 6 - Dec 2009
Volume 18, Issue 5 - Oct 2009
Volume 18, Issue 4 - Aug 2009
Volume 18, Issue 3 - Jun 2009
Volume 18, Issue 2 - Apr 2009
Volume 18, Issue 1 - Feb 2009
Selecting the target year
The Solidification of
by Using Waste Cement and Inorganic Waste By-Products
Ahn, Ji-Whan ; Yoo, Kwang-Suk ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 3~10
This paper will introduce the study which is the solidification and reduction of
green house gas, by using inorganic industrial wastes such like waste cement, steel making slag, incineration ash and so on. These inorganic wastes contain a large quantity of CaO content in common, which is easily reacted with CaO resulting in formation of
. It will be suggested in this study that the necessary of the reduction and solidification of
gas with using industrial inorganic wastes is for building the Korea carbon storage model in this study.
Long- Term Durability of Construction Structure and Effective Use of Technology for Construction Waste
Kim, Gyu-Yong ; Choi, Hyeong-Gil ; Nam, Jung-Su ; Song, Ha-Young ; Lee, Do-Heun ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 11~19
Recently the problem of global environment is became by social issue. Accordingly the interests to recycling and saving of resources are growing from daily life to varieties field of industry. To preserve the global environment, prevent global warming, environmental destruction, environmental pollution by wastes, the drain of aggregate, plasticity energy of cement and decrease in carbon dioxide are an urgent problem that must be resolved. So there is to a field of building industry and stands but on the inside of the building the many double meaning resources usefully, applies. Also the seller masterpiece building where the service life is long planned is safe and comfortably, maintenance, suppresses the construction which is not necessary is unnecessary. Also the seller masterpiece building where the service life is long planned is safe and comfortably, maintenance, suppresses the construction which is not necessary is unnecessary. By revitalizing effective use of limited earth resources, recycling and controling production of construction waste, this study introduced to a method for Long-Term Durability of Construction Structure and Effective Use of Technology for Construction Waste considering architectural demand and earth environment. It is for reduction of an earth environment load from the side of construction production and performance design of a structure.
Properties of Fresh Concrete with Recycled Coarse and Fine Aggregates
Choi, Ki-Sun ; You, Young-Chan ; Kim, Keung-Hwan ; Lee, Do-Heun ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 20~26
The objective of this study is to investigate the properties of fresh concrete with recycled coarse and fine aggregates. Four different kinds of aggregate with natural, recycled aggregates were prepared. The concrete mixtures were produced with test parameters of replacement ratio of recycled aggregate. The properties of the fresh concrete were measured by means of slump and air content according to elapsed time. Quality control method to maintain the constant total mixing water for recycled aggregate concrete was suggested. The all concrete mixtures were produced with approximately the same slump on the job site after an hour. Test results indicated that compressive strength of concrete with constant slump is not affected by the replacement ratio of recycled aggregate. Also the practical way for the quality control of recycled aggregate concrete is to maintain the constant total mixing water.
Development of High quality Recycled Aggregate Production Process from Waste Concrete for Resource Circulation System
Kim, Kwan-Ho ; Cho, Hee-Chan ; Ahn, Ji-Whan ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 27~35
To solve resource exhaustion and waste management problems caused by mass consumption, there are many efforts to change from resource consumption system to recycling system. Specially, interests about management of construction waste have increased, but efficient recycling system of waste concrete is not established yet. In this study, high quality recycled aggregate processing circuit was developed to recycle waste concrete. From the waste concrete which is a hydrated compound with coarse aggregate, fine aggregate, and cement material, high quality recycled coarse aggregate for concrete making was produced by autogenous milling and heat pretreatment method. After then, refinement process was performed to separate fine aggregate and cement material from waste concrete fines by sink float separation and hindered-settling separation. As a result, high quality recycled aggregate was produced from waste concrete by developed processing circuit.
Carbonation Treatment of EAF Slag for Using Aggregate of Concrete
Yoo, Kwang-Suk ; Ahn, Ji-Whan ; Lee, Kyung-Hoon ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 36~41
The objectives of this study are focusing on the issue with efficiently recycling for EAF slag as construction material such as an aggregate of concrete. This study can be classified mainly into two categories: the first section is the carbonation treatment of Electric Arc Furnace(EAF)-slag for obtaining soundness as using aggregate of concrete. And the second section is the application of carbonated EAF-slag on the mortar test to evaluate the stability and mechanical property, which is compressive strength, according to the replacement of EAF-slag on the mortar. It was known that pH of EAF-Slagle according to carbonation time decreases drastically to 7 within several sec of carbonation, and a calcite is formed on the surface of EAF slag. The formation of calcite during the carbonation process of EAF slag lead to fill at pore in the texture of EAF-Slag surface, and than the porosity of EAF-slag decreases with carbonation process. In the mortar test, compressive strength, according to the replacement of EAF-Slag to sand on the mortar, the compressive strength of mortar increased as the 50% replacement ratio of EAF slag for sand was above 10% higher than that of reference mortar according to 50% replacement of EAF slag.
Properties of Reaction Rim on Blast Furnace Slag Grain with Alkali Activator according to Hydration Reaction
Lee, Seung-Heun ; Mun, Young-Bum ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 42~48
Since there are
ion of high concentration at early hydration in the system added with activator (NaOH+
) in the blast furnace slag, different from cement hydration, hydration progresses fast without induction period and forms reaction rim around the blast furnace slag grain.
reaction rim was formed around the blast furnace slag grain from the 1 day of reaction period, and the thickness of reaction rim increases over the reaction time, growing to
on the 28 days. Unreacted blast furnace slag grain deformed from angular shape to the spherical shape. Mole ratio of Ca/Si tends to decrease from inside of blast furnace slag grain to reaction rim. Difference of Ca/Si mole ratio between reaction rim and inside the blast furnace slag grain decreased and generated hydrate was a poor crystalline CSH(I) with Ca/Si mole ratio less than 1.5.
Effect of MgO in Synthesis of Alinite Clinker
Yoo, Kwang-Suk ; Ahn, Ji-Whan ; Han, Dong-Yoon ; Cho, Kye-Hong ; Oh, Myung-Hwan ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 49~54
The effect of MgO in synthesis of alinite clinker was investigated. Clinker of alinite composition ratio and alintite clinker substituted for MgO of 3.77% were sintered at
at the interval of
. Synthesized phases and hydration heat of alinite clinker with MgO and without MgO were then investigated. As a result, alinite, CCA,
and f-CaO phases are synthesized in alinite clinker without MgO sintered at
, while only alinite phase is synthesized in alinite clinker with MgO sintered at
with the highest synthesis rate. Heat evolution of alinite clinker with MgO has no induction period.
A study on the Thermal Filter Press for the Reduction of Pigment Sludge
Lee, Jung-Eun ; Lee, Jae-Keun ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 55~61
Dewatering process to remove water from pigment sludge was important in the diverse aspects of the improvement of product quality, curtailment of the drying cost and the transportation. It was difficult to dewater pigment particles with the mechanical forces because the size was fine under
. Thermal filter press dewatering equipment composed of squeezing plate and a fixed heating plate was developed to improve the dewaterability of pigment the sludge as supplying the heat from the fixed heating plate to the cake. Several tests that estimate the dewaterability for pigment sludge as with or without squeezing process and the difference of dewatering time was conducted with this equipment. Dewaterability of thermal dewatering under squeezing process was increased about 20% compared with non squeezing process. Under squeezing process, thermal dewatering tests changing dewatering time with 70 and 80 minute were conducted respectively. The water content of cake was more reduced at dewatering time of 80 minute compared with 70 minute, and dewatering velocity was also decreased, which caused the productivity of thermal filter press to drop. It was observed that clogging of filter cloth didn't almost occur because the liquid was discharged from cake layer easily. In this research, it was resulted that the squeezing process and long dewatering time were effective to improve the dewaterability of pigment sludge. So, this thermal filter press equipment was useful for dewatering the fine particle sludge like pigment.
Preparation of Magnesium by Fused Salt Electrolysis Using Mono-Polar Cell
Park, Hyung-Kyu ; Kim, Chul-Joo ; Yoon, Ho-Sung ; Kim, Sung-Don ; Eom, Hyoung-Choon ;
Journal of the Korean Institute of Resources Recycling, volume 18, issue 3, 2009, Pages 62~68
Continuous operation for 24h was carried out to establish the optimum condition at the magnesium fused salt electrolysis using a self made 150 ampere mono-polar type cell. An electrolyte composition of
25%, NaCl 55%,
1% was electrolyzed with applied voltage 7V, cathode current density
, electrode distance 6cm at
for 24 hours. Changes of applied current, composition of the electrolyte, current efficiency were investigated. Through the experiments, there were not any operating troubles with the self-made electrolytic cell. Purity of the electrolyzed magnesium metal was above 99%, and 89% of current efficiency was achieved. Some basic data for scale-up of the magnesium electrolysis equipment which would be necessary for commercialization were obtained.