• 한국재난정보학회 논문집
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• 제6권1호
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• pp.10-24
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• 2010

In this paper, warm asphalt binder was proposed as a substitute for the polymer-modified asphalt binder to get higher viscosity than that of the polymer-modified at the same temperature. Performance grade test and rotational viscosity of warm asphalt binder were conducted to evaluate the property variations due to the addition of admixture. Research results showed that the viscosity of warm asphalt binder at $100^{\circ}C$ was similar to that of the conventional asphalt binder. The performance and durability of warm asphalt binder were also comparable to those of the polymer-modified. It is considered that the active applications of warm asphalt binder can reduce environmental damages due to less diffusions of carbon dioxide compared to the conventional.

• 한국도로학회논문집
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• 제15권2호
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• pp.113-119
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• 2013

PURPOSES : The objectives of this study are to develop the eco-friendly pavement material using polyurethane binder and evaluate mechanical properties of the developed binder and concrete. METHODS : The bending beam test was conducted to select the sample candidates of polyurethane binder based on the bending strength. The characteristics of viscosity, curing time, and temperature change of sample binder was examined on different temperature conditions. The mechanical properties of polyurethane binder was estimated using the dynamic modulus testing. The indirect tensile strength test was conducted on polyurethane binder concrete with different gradation and binder content for evaluating the mechanical properties of concretes. RESULTS : Based on the beading beam test, four different binder samples were prepared for estimate the mechanical properties. The viscosity of polyurethane binder tends to increase with increase of liquid temperature and the hardening phenomenon begins 10 to 15 minutes at room temperature after mixing the resin and hardener. It is observed that the dynamic modulus of binder increases as loading frequency increases and change of modulus is found to be the highest in the PU-2I binder type. The PU-2I binder concretes shows the largest value of indirect tensile strength and indirect tensile energy. CONCLUSIONS : The use of polyurethane binder as pavement materials is capable of increasing the pavement performance and reducing the detrimental environmental effect during the highway construction.

• 한국주조공학회지
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• 제44권3호
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• pp.70-76
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• 2024

규산나트륨 바인더는 주조산업의 유기바인더를 대체할 수 있는 친환경 무기바인더이지만, 대기 중의 수분에 대한 낮은 안정성을 가지고 있다. 본 연구는 경화된 규산나트륨 바인더가 가진 수분함량이 바인더의 강도와 안정성에 미치는 영향을 확인하기 위해, 경화 조건을 달리하여 중자를 제작하고 굽힘강도를 측정하였다. 규산나트륨 바인더는 130℃ 이상에서 Q³와 Q²의 실리케이트 구조를 가지는 바인더 가교를 안정적으로 형성하는 것을 확인하였다. 중자의 최대 굽힘강도는 경화 조건에 크게 영향을 받지 않는 것으로 확인되었다. 이는 해당 경화 조건에서 바인더 가교를 형성한 실리케이트 구조가 유사하기 때문이다. 반면에 경화된 바인더의 수분 함량이 적을수록 강도안정성은 높아지는 것을 확인할 수 있었다. 따라서 경화된 규산나트륨 바인더의 수분함량은 바인더의 안정성에 영향을 미치는 중요한 인자인 것을 확인하였다.

• 펄프종이기술
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• 제46권6호
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• pp.63-70
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• 2014

Part of SB latex in pre-coating color was substituted with newly developed starch-based bio-binder in order to investigate the effect of starch-based bio-binder in pre-coating color on the properties of coating color and coated paper. Smoothness and gloss of coated paper were decreased with the increase of bio-binder substitution ratio. Brightness and whiteness did not show the significant changes, but stiffness was improved with bio-binder. Ink set-off, dry-pick and wet pick were decreased with the increase of bio-binder substitution ratio. In general, when all SB latex is substituted with bio-binder, ink set-off, dry- and wet-pick were deteriorated. However, it was found that if the bio-binder substitution ratio is controlled below 50%, similar qualities with coated paper manufactured by the use of SB latex binder can be obtained.

• 한국지반공학회논문집
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• 제22권11호
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• pp.143-149
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• 2006

무단 매립이나 일시 야적으로 환경오염을 유발하는 굴패각을 활용한 친환경 굴패각고화재의 고화성능을 평가하는 일련의 실험연구를 수행하였다. 연구목적은 연약지반개량에 적용하기 위하여 고화재의 고화능력을 평가하고 지반개량 효과를 규명하는 것이다. 이를 위하여 굴패각 고화재 및 시멘트 고화재를 가지고 준설토사에 적용하여 양생기간 및 물/고화재 비를 다르게 변화하면서 일축압축실험을 수행하여 상호 비교하였다. 실내모형 실험을 수행한 결과,굴패 각 고화재는 표층이나 천층 및 심층혼합처리공법으로 연약지반을 개량하는 경우에 시멘트 고화재 보다 고화성능이 우수한 것으로 나타났다.

• 한국도로학회:학술대회논문집
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• 한국도로학회 2006년도 학술발표회 논문집
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• pp.105-114
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• 2006

There are several methods determining an appropriate performance grade of virgin binder, which is re(erred as design binder, in RAP contained bituminous mixture design process. However, difficulties have been experienced in utilizing the methods in the field application in Korea, because SHRP binder test, the key tests to determine a design binder, requires well-trained personnel, high price equipment, and time consuming process. Thus, the study investigated the relationship among the binder aging level, RAP contents, and rheologica1 properties of binder. The study results provide mix designer with a simple method in selecting an appropriate grade of virgin binder.

• 한국전기전자재료학회논문지
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• 제19권12호
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• pp.1112-1117
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• 2006

The properties of LTCC green tape with addition of binder were investigated in order to understand an effects of binder on multilayer processing. A green sheet form was fabricated through tape casting method with the MLS-22 powder. The lamination density increased with increasing amount of binder and lamination pressure. With increasing amount of binder, the elongation of ceramic sheets increased but the tensile stress and air-permeability decreased. The addition of excessive binder is caused defects in the green sheet during via hole punching. The optimum condition of the via hole without defects was observed from amount of the binder 10 wt%.

• KCI Concrete Journal
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• 제13권1호
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• pp.35-41
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• 2001

This paper investigated rheological properties of binder pastes for self-compacting high performance concrete. Six mixtures of self-compacting concrete were initially prepared and tested to estimate self-compacting property. Then, the binder pastes used in self-compacting concrete were tested for rheological properties using a rotary type rheometer. Binder pastes with different water-binder ratios arid flow values were also examined to evaluate their rheological characteristics. The binders were composed of ordinary Portland cement, fly ash, two types of pulverized blast-furnace slag, and limestone powder. The flow curves of binder pastes were obtained by a rotary type rheometer with shear rate control. Slump flow, O-funnel time, box, and L-flow teats were carried out to estimate self-compacting property of concrete. The flow curves of binder pastes for self-compacting concrete had negligible yield stresses and showed an approximately linear behavior at higher shear rates beyond a certain limit. Test results also indicated that the binders incorporating fly ash are more appropriate than the other types of binders in quality control of self-compacting concrete.

• 한국세라믹학회지
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• 제43권4호
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• pp.253-258
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• 2006

In the lamination process of multi-layer ceramic modules, the occurrence of delamination comes into repeatedly. To completely improve the lamination process of LTCC sheets, a binder film was introduced between the layers. The binder film did not originate the delamination until the thickness under $40{\mu}m$. After lamination, the thickness of the binder film was determined by the infilteraion of binder by the pressure, and after the bake-out, was dependent on the decomposition of binder resin. Any detectable defect was not observed in the multilayer structure with Ag inner electrodes.

• 펄프종이기술
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• 제44권5호
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• pp.32-38
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• 2012

This study was carried out to elucidate the potential in substitution of SB latex with eco-friendly starch based bio-binder as a coating binder. The part of SB latex in coating color of pre- and top layer was substituted with starch based bio-binder in order to evaluate the characteristics of coating color and coated paper, and printability. The viscosity and water retention of coating color were increased by substitution of SB latex with starch based bio-binder. Roughness of coated paper was increased by substitution with starch based bio-binder, although there was not significant changes in roughness when SB latex is used as a binder in pre-coating color. Brightness and whiteness of coated paper were not affected, but opacity and print mottle were improved by substitution with starch based bio-binder. The interesting result observed was that dry-pick did not affected significantly, and ink set-off was improved by starch based bio-binder. It is expected that starch based bio-binder can be commercialized if the systematic further research works are carried out.