• 대한토목학회논문집
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• 제35권1호
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• pp.229-236
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• 2015

본 연구는 에폭시 아스팔트 포장 내부 상태 평가를 위해 이동 차량하중 모사가 가능한 회복탄성계수 실험과 LWD 실험을 수행하였다. 회복탄성계수 실험에서 측정된 변위는 일반 아스팔트와 달리 잔류변형이 매우 미소한 수준으로 탄성변형과 유사한 거동을 보여 정상 상태로 해석해도 무리가 없는 것으로 나타났다. 회복탄성계수에서 측정된 변위 결과를 처짐 탄성계수로 변환 후 1 SIGMA 단계를 적용하여 정상 처짐 탄성계수 범위를 산정하였다. $60^{\circ}C$에서의 파손 의심 처짐 범위와 하중-변위 선도 개형으로 포장 내부 상태를 예측하였다. 정상 표면처짐 구간인 $140{\mu}m$의 일부 구간에서 수분 침투 및 접착성능 저하가 관찰되었으나, 하중-변위 선도 개형에서 변곡점 발생 구간으로 확인되었다. 현장 확인 결과 제시된 기준은 높은 수준의 정확도를 보이는 것으로 나타났다.

• 폴리머
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• 제31권1호
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• pp.68-73
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• 2007

도로 포장용 아스팔트의 성능을 개선하기 위하여 유화중합법으로 반응성 고분자 개질제들을 합성하였다. Styrene, methyl methacrylate (MMA) 및 isoprene과 아스팔트의 아스팔텐 성분의 carboxyl group과 반응시키기 위하여 epoxy ring을 가진 glycidyl methacrylate(GMA)를 단량체로 사용하였다. 단량체의 조성을 다양하게 변화시켜 개질제들을 중합하고, 중합된 개질제와 아스팔트의 상용성을 검토하였다. 혼합이 잘 되는 개질제들에 대하여 시차주사열량계 (DSC)로 $T_g$를 측정하였다. 합성 후 epoxy ring의 존재 여부와 아스팔텐과의 반응성을 알아보기 위해 푸리에 변환 적외선 분광기(FTIR)를 이용하였고, 핵자기공명법(NMR)으로 개질제 분자 구조의 해석을 행하였다. 아스팔트와 혼합이 잘 이루어지는 개질제들은 $T_g$가 $37.5{\sim}56.5^{\circ}C$ 사이이며, isoprene의 비율이 30 wt%이었다.

• Elastomers and Composites
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• 제50권4호
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• pp.304-313
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• 2015

In this study, the anionic emulsified asphalt was prepared by dispersing asphalt particles evenly into water with combination of anionic and nonionic surfactants. Effects of NaOH and $CaCl_2$ on the phase stability of the emulsified asphalt were also investigated through zeta potential value and rheology behavior; the emulsified asphalt added with NaOH and $CaCl_2$ showed higher zeta potential value than that the asphalt with addition of only anionic and nonionic surfactants. In addition, with regard to shear thinning behaviors, it was found that pH of the emulsified anionic asphalt and $Ca^{2+}$, counter ion, affected the phase stability. SBR (styrene-butadiene-rubber) latex, EPD (water dispersed Epoxy), PU (polyurethane) and RI-10S, SBS (styrene-butadiene-styrene)-based property improvement additive, were used and studied to enhance the adhesion properties with the aggregates. RI-10S, however, was found to be only compatible with the anionic emulsified asphalt; the coating rate, adhesion and compression strength were increased with the RI-10S content.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 추계 학술논문 발표대회 논문집
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• pp.61-65
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• 2006

Urethane, epoxy, acrylic have common property to adhere on the concrete dried surface in the waterproofing materials at present. In the wet condition, however, the materials such as urethane, epoxy, acrylic need a long hardening time and it become a reason of water leakage as the materials breaking down. it is one of the problem to adhere to the substrate. Therefore, in this thesis, I focused to assure the structural safety and durability and quality for waterproofing and safe of construction cost by cut down the cost of labor and reduce the term of works as searching the application of field condition for hish adhesive spray type of degenerated and rubberized asphalt membrane material.

• 한국도로학회:학술대회논문집
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• 한국도로학회 2010년 추계학술대회 논문집
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• pp.93-98
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• 2010

• 한국방재학회 논문집
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• 제8권5호
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• pp.65-70
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• 2008

변형과 파손 등의 공용성능 문제가 발생하고 있는 아스팔트 포장과 콘크리트 포장에 비해 내구성능이 우수한 에폭시와 세라믹스를 결합한 혼합물을 도로포장에 적용하기 위하여 실내물성실험을 수행하고 현장에 적용하였다. 본 연구는 부착력과 내구성이 뛰어나 구조물 보수, 보강에 널리 사용되는 에폭시를 도로포장에 적용하기 위해서 세라믹스와 금속성분 등의 micro powder를 첨가하여 포장 재료로써의 공용성능을 확인하고 이를 현장에 적용하여 작업성과 시공성 등을 확인하였다. 콘크리트포장 현장의 시험시공은 파손된 기존 포장구간에 면처리 후 7 mm 박층으로 시공하였고, 아스팔트포장 현장의 시험시공은 파손된 기존 포장구간에 면처리 후 15 mm 박층으로 시공하여, 12개월 가량 균열 및 변형 발생여부를 관찰하였다. 에폭시와 세라믹스를 결합한 혼합물은 기존 포장과의 부착력이 뛰어났으며, 변형과 파손에 대한 저항성이 기존 포장재료에 비해 우수한 것으로 나타나 이를 도로현장에 적용할 경우, 공용성능 및 공용년한의 향상이 기대된다.

• Elastomers and Composites
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• 제50권4호
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• pp.265-273
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• 2015

In this work, the emulsified asphalt with high phase stability and storage stability was prepared by using phase inversion emulsification and the surfactant mixed with cationic and nonionic surfactants. It was found that the asphalt together with Span 20, nonionic surfactant and DDA (Dimethyl Dodecyl Amine), cationic surfactant showed the most stable phase. The phase stability of the emulsified asphalt, therefore, was investigated through the particle size with mixed surfactant content, rheology behavior and Zeta potential value; the particle size decreased with the increase of the mixed surfactant content but the viscosity increased. The shear thinning behaviors and the Zeta potential value with 50 mV~60 mV were shown, which was found to be considered stable. In addition, SBR latex(Styrene-butadiene-rubber) and water dispersed Epoxy (EPD) were used to enhance the physical properties of the emulsified asphalt. The swelling and adhesion features of the emulsified asphalt were also studied with $CaCO_3$, Silica, and Montmorillonite (MMT). It was shown that the addition of SBR latex and MMT can be another way to improve the physical properties of the emulsified asphalt in that the lowest swelling feature was found.

• 한국건축시공학회지
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• 제6권4호
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• pp.85-92
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• 2006

Urethane, epoxy, acrylic have common property to adhere on the concrete dried surface in the waterproofing materials at present. In the wet condition, however, the materials such as urethane, epoxy, acrylic need a long hardening time and it become a reason of water leakage as the materials breaking down. it is one of the problem to adhere to the substrate. Therefore, in this thesis, I focused to assure the structural safety and durability and quality for waterproofing and safe of construction cost by cut down the cost of labor and reduce the term of works as searching the application of field condition for high adhesive spray type of degenerated and rubberized asphalt membrane material.

• 복합신소재구조학회지
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• 제6권4호
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• pp.29-41
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• 2015

• 한국방재학회:학술대회논문집
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• 한국방재학회 2007년도 정기총회 및 학술발표대회
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• pp.349-352
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• 2007

Asphalt overlay resurfacing techniques have been widely utilized in maintaining asphalt concrete in Korea, causing severe traffic congestions while being in construction and difference in level due to the repeated overlay. Besides on these technical difficulties, there have been financial disadvantages associated with technique, mainly because overlay method has been executed for pavements with intact foundations, which is contrary to the norm. This study is aiming to increase the expected life length of the asphalt pavement up to the endurance period, to raise the efficiency of the pavement by maximizing the social benefit and to enhance public character of the street through combining ceramics with epoxy resins, which has advantages in compatibility with the existing pavement materials, durability to abrasion and endurance. It has been expected that the adoption of new method and pavement materials to the actual work sites will develop the performance of the pavements, and to lengthen the durability of the existing materials. The other advantages of the 'thin surfacing' method could be the improved adhesiveness, waterproof, corrosion-proof and bending strength.