• Title/Summary/Keyword: 교면

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A Development of the Trapped Water Drainage System to Prevent the Deterioration of Deck Slab and Pavement. (교면 포장 및 바닥판 손상 방지를 위한 내부 침투수 처리시스템 개발)

  • 조서연;한범성;이상달;이성수;이상순;이일용
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.11a
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    • pp.1175-1180
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    • 2001
  • Reinforced concrete deck slabs are directly affected by traffic loads and they are also susceptible to weather-related problems, such as cracking, reinforcement corrosion, spatting, scaling, delamination, leakage, efflorescence and so on. Some of these defects are caused by water which seeps through pavements and trapped between pavements and deck slabs. For durability of reinforced concrete deck slabs and pavements, it is very important to protect deck slabs and drain the trapped water out. To develop the trapped water drainage system, the following studies have been performed in Korea Highway Cooperation: related researches are reviewed; for six bridges, deck slabs are thoroughly investigated; new system to effectively drain the trapped water out is proposed; the proposed system is installed and evaluated. The proposed system is proved to be effective to drain the trapped water out and is expected to increase the durability of reinforced concrete deck slabs.

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Proposal of Bond Strength Evaluation Method for Bridge Deck Overlay (교면 덧씌우기 콘크리트의 부착강도 평가 방법 제안)

  • 장흥균;홍창우;정원경;이봉학;윤경구
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.05a
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    • pp.349-354
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    • 2002
  • Significant improvements in bond strength between new and existing concrete can be achieved through the modification of the new concrete by latex modification. But, no test method has been adopted as a standard to measure the bond strength between the concrete used to repair and the substrate being repaired. The performance of old and the new concrete construction depends upon bond strength between old and the new concrete. Current adhesion strength measurement method ignores the effect of stress concentration by shape of specimens. Therefore, this research calculates stress concentration coefficient using finite element analysis and direction tensile strength test (pull-off test). The result shows that the required core depth is 2.5cm. Elastic modulus and overlay thickness do not influence in stress concentration.

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Quality Control Recommendation with Waterproofing Membrane Type of Waterproofing System for Concrete Bridge Decks (계열별 교면 방수시스템의 품질관리 지침(안) 고찰)

  • 이병덕;박성기;심재원;정해문;김광우
    • Proceedings of the Korea Concrete Institute Conference
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    • 2002.05a
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    • pp.367-372
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    • 2002
  • The waterproofing systems of concrete bridge deck are installed under the complex circumstances, such as traffic loading, weather, and the condition of the deck concrete. For assuring the effectiveness of waterproofing system, the materials and the construction method and timing ought to be suitably selected with the procedures of waterproofing and the system has to ensure the economical performances. First of all, we discussed whether the quality and performance criteria for highway bridge deck are resonable or not through the investigation of domestic and foreign criteria. The basic properties of waterproofing membranes on market and the performance of waterproofing systems of concrete bridge deck have also been investigated in the view of the damages frequently reported from job site. In this way, the causes and measures of damages, the guidelines of design, construction, quality control, and maintenance, the test methods and criteria of membranes and waterproofing system, are proposed.

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Evaluation of Optimum Thickness of High Performance Concrete Bridge Deck Pavement (고성능 콘크리트 교면포장의 최적 두께 평가)

  • Park, Hae-Geun;Kim, Ji-Won;Jeon, Sang-Eun;Lee, Myeong-Sub;Won, Jong-Phil
    • Proceedings of the Korea Concrete Institute Conference
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    • 2006.05a
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    • pp.318-321
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    • 2006
  • The objective of this study is to evaluate the optimum thickness of High Performance Concrete bridge deck pavement. The application of High Performance Concrete bridge deck pavement with micro-silica was introduced to north America in the early 1980's. In order to decide the optimum thickness of High Performance Concrete bridge deck pavement, we conducted Finite Element Method analysis with Incheon Grand Bridge constructed by SAMSUNG E&C. From the FEM results, a thickness of five centimeters of High Performance Concrete bridge deck pavement with micro-silica is considered as a resonable value compared with the conventional asphalt bridge deck pavement.

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A Study on the Development of the Wheel Tracking Test and Evaluation Method on Blind Type of Waterproofing Layer (비노출 방수층의 윤하중 시험 및 평가방법 개발에 관한 실험적 연구)

  • Song Je-Young;Eom Deok-Jun;Kwak Kyu-Sung;Oh Sang-Keun
    • Journal of the Korea Institute of Building Construction
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    • v.6 no.1 s.19
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    • pp.67-72
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    • 2006
  • There are a lot of problem about waterproofing membrane coating for concrete deck of bridge and waterproofing sheets for concrete of deck of bridge because it couldn't confirm waterproofing's defeat after construction. These problems make a waterproofing material damage and condrete deck of bridge damage. So It needs a lot of money for repair work and reinforcement work. Therefor the structure slab of using waterproofing material protect invasion of water. Also, Concrete deck of bridge need a endurance permeability for the reduction repair payment. In this study, An experimental study on the quality standardization test method waterproofing layer on working of live load.

The Effects of Temperature Conditions on the Tensile Adhesive Characteristic of the Bridge Decks Waterproofing Systems (온도조건이 교면방수시스템의 인장접착특성에 미치는 영향)

  • 이병덕;박성기;김도형;옥창권
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.05a
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    • pp.293-298
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    • 2003
  • In this study, tensile adhesive strength(TAS) test was carreid out for evaluated the effects of temperature conditions(-20, -10, 5, 20, 30, $40^{\circ}C$) on the tensile adhesive characteristics about six waterproofing membranes which were commercially used in bridge decks. And, failure appeariences of waterproofing systems in each temperature were investigated and observed the sawing surfaces of waterproofing systems for whether or not damaged of waterproofing membranes. TAS test results were increased when test temperature was decrease in all waterproofing membrane. The type of failure was ductile in $30^{\circ}C$ and $40^{\circ}C$, but brittle failure below $20^{\circ}C$. This results were shown that if temperature above $30^{\circ}C$ is continued for a long time, waterproofing material will be damaged by softening and a part of membranes were damaged by hot aggregate in SMA. So we will consider the type of asphalt for choice of the waterproofing membranes.

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Effect of Asphalt Pavement Conditions on Tensile Adhesive Strength of Waterproofing System on Concrete Bridge Deck (아스팔트 포장 조건이 교면방수 시스템의 인장접착강도에 미치는 영향)

  • 이병덕;박성기;김광우;정해문
    • Proceedings of the Korea Concrete Institute Conference
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    • 2003.05a
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    • pp.299-304
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    • 2003
  • In this research, eight waterproofing membranes were selected from commercial market and the tensile adhesive characteristics of the waterproofing system (WPS) on concrete bridge deck were investigated in view of various factor in asphalt pavement. Tensile adhesive strength (TAS) test of different asphalt pavement types showed that TAS of WPS under SMA (Stone Mastic Asphalt) pavement was greater than that under dense asphalt pavement. Tensile adhesive strength (TAS) of sheet membranes was improved as the compaction temperature of asphalt concrete increase, but TAS of liquid membranes were not. TAS of sheet membranes after wheel tracking test were in the order of the sites under wheel path (UWP), before wheel tracking (BWT) and nearby wheel path (NWP), Since TAS of the same WPS of UWP was higher than TAS of BWT, wheel loading had function of pressing WPS resulting in higher adhesive strength, But liquid membranes were variable on types, The feature of detached interface after T AS test showed that sheet types were all detached in between deck concrete and WPS, and liquid types were detached in between asphalt pavement and WPS,

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A Study on the Blind Type of Waterproofing Layer of Wheel Tracking of Test Method and Valuation on Working of Live Load (이동하중이 작용하는 비노출 방수층의 윤하중 시험방법 및 평가에 관한 연구)

  • Eom Deok-Jun;Seon Yun-Suk;Kwon Si-Won;Oh Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2005.11a
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    • pp.1-5
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    • 2005
  • There are a lot of problem about waterproofing membrane coating for concrete deck of bridge and waterproofing sheets for concrete of deck of bridge because it couldn't confirm waterproofing's defeat after construction. These problems make a waterproofing material damage and concrete deck of bridge damage. So It needs a lot of money for repair work and reinforcement work. Therefor the structure slab of using waterproofing material protect invasion of water. Also, Concrete deck of bridge need a endurance permeability for the reduction repair payment. In this study, An experimental study on the quality standardization test method waterproofing layer on working of live load

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Strategy of LMC Application at Bridge Overlay in Korea (LMC 교면포장공법의 국내 도입 방안)

  • 김기헌;윤경구;박상일;홍창우;이주형
    • Proceedings of the Korea Concrete Institute Conference
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    • 2000.10b
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    • pp.1063-1068
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    • 2000
  • Latex modified concrete (LMC) has grown to be accepted as a standard material of construction overlaying bridge decks in America due to its superior physical and chemical properties. The properties of latex, combined with the low water-cement ratio, produce a concrete that has improved flexural, tensile, and bond strength, lower modulus of elasticity, increased freeze-thaw resistance, and reduced permeability compared to conventional concrete of similar mix design. LMC overlays have been service in excellence for 30 years on thousands of bridge in U.S.A. This may, also, prolong the life cycle of bridge deck once it is adopted in Korea. The self-contained, mobile, continuous mixer is most appropriate particularly for concrete quality assurance. Assuring quality on a bridge deck overlay project should begin in the design phase and continue after the construction is completed. Quality should be the concern of everyone involved-owner, designer, and contractor.

Application and Development of Protect Technique for waterproofing Reinforced Concrete Bridge Decks by Latex-Modified Mortar (라텍스 모르타르를 이용한 콘크리트 교면 방수층 보호 공법 개발 및 적용에 관한 연구)

  • Han, Sang-Il;Lee, Won-Young;Kim, Jae-won;Kang, Seung-Hee;Cha, Dong-Hwa;Kim, Jin-Man
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.11a
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    • pp.175-178
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    • 2009
  • This study is thing for construction properties that protect about damage of waterproofing course that is problem in asphalt pavement and latex modification concrete pavement. It is thing about new method of construction and develop protecting material of waterproofing. Did performance test item first at, as a result, drew by suitable thing in all KS items, This is considered to have more effective spot construction work because if means that have stability by material as well as method construction.

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