Earticle

In this study, the composition of concrete mixed with waterproofing agent was analyzed. Four specimens were prepared for the experiment and they were investigated through SEM-EDS analysis and X-ray fluorescence analysis. The research results are as follows. First, the most detected ions are four elements such as Ca, Si, Al, and Mg. There was no difference in component properties according to the amount of waterproofing solution. Second, there was a large difference in pores between concrete without waterproofing agent and with waterproofing agent, and the pore size of the specimen with waterproofing agent was relatively small. Third, as a result of SEM-EDS analysis and X-ray fluorescence analysis, the most common component in concrete was CaO, followed by SiO2, Al2O3, and MgO. The reaction between Ca ions and other Si, Al, and Mg ions was considered to be the main factor in the waterproofing effect by reducing the voids of concrete.

In this study, a test specimen was prepared to analyze the waterproof performance of concrete with waterproofing agents. The necessary construction procedure was determined in first, and the change of the relative humidity by the time variable according to strength, hydraulic pressure and cover thickness was investigated. Experiments were conducted to obtain basic data on materials and construction methods of waterproofing agents. For the analysis of waterproof properties, the change of relative humidity of each test specimen was relatively compared. The conclusions of this study are as follows; In the case of concrete mixed with a waterproofing agent, good waterproof performance can be secured by increasing the compressive strength and cover thickness. Additionally, in case of concrete designed with relatively high strength, if the water pressure is not high, it is concluded that moisture penetration does not exceed a certain range for concrete with a certain cover thickness. At any case, it is necessary to make and use accurate construction guidelines for using waterproofing agent.

본 논문은 GMA(SIS, Stylene Isoprene Stylene) 고분자계 수지를 기반으로 제조된 아스팔 트 바인더를 사용하여 플랜트에서 제조하는 혼합물로 방수기능을 갖도록 성능을 개선한 신개념의 불투수성 아스팔트 포장의 연구를 위해 수행하였다. GMA 고분자 수지 기반의 아스팔트는 유연성과 탄성을 바탕으로 중차량의 충격에 의한 영향을 받지 않으며, 우수 시 에 포트 홀의 발생과 소성변형 등 여름철 온도 변화에도 안정적이다. 새롭게 제안된 열가소 성 폴리머를 사용한 아스팔트 포장재료는 방수기능은 물론 역학적 특성을 검증하기 위해 KS기준과 ASTM기준에 맞게 안정도, 흐름값, 공극률, 동적 안정도, 인장강도비, 미끄럼 저 항성 실험을 하여 역학적 특성을 분석 하였다.

This paper presents features of impermeable asphalt pavement material that uses thermoplastic GMA-based polymer(SIS, Stylene Isoprene Stylene) to improve the waterproof performance. Furthermore, as part of this study, the aerodynamic characteristics of the asphalt paving materials, using the newly suggested thermoplastic polymer, are identified through experiments. In the experiment, the aerodynamic characteristics were analyzed by testing on stability, flow values, porosity, dynamic stability, tensile strength ratio and skid resistance in accordance with KS standard and ASTM standard.

불투수성 방수아스팔트는 아스팔트 혼합물이 골재와 골재 사이를 강력하게 부착하며, 골재간의 공간을 메우고, 골재표면을 두껍게 코팅하여 골재 상호간의 강한 접착을 유지시켜주는 열가소성 폴리머를 사용한 포장공법이다. 이러한 불투수성 아스팔트는 기존의 가열식 일반아스팔트 공법에서 문제시 되고 있는 내구 성 저하와 잦은 유지보수로 인한 문제점을 해결할 수 있는 공법으로 차세대 고내구성 포장공법으로 주목 을 받고 있다. 본 연구는 불투수성 방수아스팔트 혼합물 개발을 위한 연구의 일환으로 상온과 영하 10℃의 조건하에서 기존 아스팔트수지와 새로운 개념의 불투수성 고분자계 수지의 부착성능 비교 검토하였으며, 아스팔트혼합물의 부착성능도 실험을 통해 비교 하였다. 실험결과 불투수성 아스팔트의 부착성능이 기존 아스팔트에 비해 상온은 물론 저온에서도 뛰어난 성능을 발휘하는 것을 확인 하였다.

In this study on the appliable Asphalt sheet of monolithic and inorganic matter waterproofing ,Fing material using of field because of problem of complex waterproofing sheet. Before this cement polymer modified waterproof coating and appliable asphalt sheet of monolithic whether have stability by method of construction about all style waterproofing that evaluate to new method of construction development naturally big emphasis put and try to approach. 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 of construction.

In this study, the performance evaluation of waterproof sealant materials applied to the outer wall of PC apartment houses was conducted. The sealant for PC members must have resistance to movement, and since it is exposed to outside air, weather resistance and water resistance are required.

Loess soil called hwang-toh is used for a long time in traditional building construction field. But, now it is not widely used because loess is not good for waterproof resistance than the other modern constructional materials. The purpose of this study is to develop a waterproof agent matched with the characteristics of the soil and suggest the type of natural waterproof agents using animal fat oil and vegetable oil, and compared with the conventional chemical resin sealants. In the test, it uses 4 types test subjects which are natural loess blocks and compared with 4 waterproof agents. Four agents are Gasari 63, the vegetable oil like soybean oil, animal fat oil like beef tallow, and the mixed oil made by the vegetable oil and animal fat oil. The result of this experimental research is as follows. 1) Three natural waterproof agents which made by the soybean oil, beef tallow and the mixed oil are effective for waterproof. 2) The waterproof performance of the surface of the loess block is appeared the mixed oil is the best. And, the animal fat oil, and the vegetable oil and Gasari 63 oil in the order of performance. 3) The ability of inner resistance of waterproof about the natural loess block until the internal collapse is the natural mixed oil, the animal fat oil, the vegetable oil repellant as a sequence, and each natural waterproof agent is superior to Gasari 63 oil. 4) If it will be fine weather for a while, the performance of waterproof about loess blocks which are painted three natural waterproof agents turns out to recover a little. I expect that this research will be a starting point of a natural waterproof agent using loess and natural materials like hwang-toh block, and also it is a large implication.

The ceramic metal resin paints for waterproof and anti corrosion is not long history in development of materials even many actual result. So far, no standard have been given to construction and maintenance method, Quality and property, it is real state that cannot afford to proper quality control in job site or production. This study has been test for the ceramic metal resin paints for water and anti corrosion, as the result, it have proper performance of job site and mechanical performance of compare to other existing. In particular, tensile strength indicates more high about $14.1N/mm^2$ than epoxy resin paints, and in elongation per unit length is more high It is shows having better adhesive strength than epoxy resin paint for crack on the concrete structure. Moreover, The ceramic metal paint for water and corrosion proofing have to have main performance is watertightness and resistance for external impact, chloride ion permeation, drinkable water elution.

Integrated water-soluble film is dissolved in the rubber asphalt waterproof sheet to secure adhesive strength on freshly cast concrete on the adhesion side of waterproofing layer on the floor slab. In addition, in order to determine whether the water in the concrete slurry can dissolve the water-soluble film sufficiently, the adhesive strength of the waterproofing sheet was compared between difference wetness condition at the upper part of the concrete specimen before the concrete casting.

As the Ready-mixed Shotcrete using Powdered Polymer Dispersion, Shotcrete Matrix as totally shotcrete gel that a part of second binder in Shotcrete materials is dense. Also, Ready-mixed Shotcrete is showed the decreasing Rebound and rising Durability. Therefore, it is possible that Ready-mixed Shotcrete for High-Strength and High-Waterproof can apply to the Powdered Polymer Dispersion.

기존의 다층으로 구성되어 시공성이 낮은 옥상녹화 공법의 개선을 위해 개발한 방수 방근 시트 일체화 옥상녹화박스 유닛공법의 일체화를 위해 사용하는 전자기 유도가열방식의 금속 고정구와 콘 형상 고정구의 부착성능을 평가하기 위해 엔지니어링 PE, TPO, PVC 시트 등 3종류의 시트에 가열온도에 따른 부착성능 및 동일한 시험체로 냉열반복 후 부착성능을 측정하였다, 그 결과는 엔지니어링 PE시트에 부착한 고정구의 부착성능이 가장 우수하게 나타났으며, 금속고정구는 가열온도가 올라갈수록, 콘 형상 고정구는 가열온도가 낮을수록 우수한 부착성능을 보여주었고, 냉열 반복 후 부착시험 결과는 상온 부착시험 결과와 동일하게 나타났다. 기존의 양면 부틸테이프 고정방식의 콘 형상 고정구는 낮은 부착하중과 냉열반복에 의한 뚜렷한 성능저하가 발생하는데 비하여 전자기 유도가열방식의 고정구는 우수한 성능을 유지하였다.

A currently used roof green system with multi layers has a low constructability. Therefore a new integrated waterproof & root barrier sheet and roof green box unit system was developed using steel plate fixture and cone type fixture by electromagnetic induction heating method. This study was proceeded to evaluate adhesion performance of two types of fixtures on Engineering PE, TPO, PVC sheet in a normal condition, repeated heating and cooling condition. As a result, adhesion load on Engineering PE sheet showed the highest value. The adhesion loads of steel plate fixture showed higher value as heating temperature was getting higher. However adhesion loads of cone type fixture showed opposite tendency. Regarding to the test conditions, test results of normal condition, repeated heating and cooling condition showed same value. The cone type fixture using butyl tape showed 7 times lower adhesion load than that of cone type fixture using electromagnetic heating and 28% lower adhesion load in a repeated heating and cooling condition than a usual condition.

도심지 건물의 증가는 친환경 공간에 대한 요구를 발생시키고, 이에 따라 옥상 및 인공지반 녹화의 보급이 급속히 증가되고 있다. 본 연구는 녹화시스템의 보급 확대를 위해 공법의 단순화, 일체화, 프리훼브화 개념을 적용, 연속 토양층 형성 박스 유닛형 녹화시스템을 개발하고, 이 시스템의 주요 성능으로 부착성, 내풍성, 단열성을 평가하여 적용 가능성을 검토하였다. 부착성 및 내풍성 시험결과, 설계 풍압 및 풍속과 비교하면 100m 높이의 건물에 설치해도 안전한 것을 확인하였고, 단열성 평가를 위해 120일간 측정한 내부 온도의 변화를 분석한 결과, 개발 시스템이 연속된 토양층을 형성하여 기존 유닛박스 시스템보다 주간은 17%, 야간은 45% 우수한 단열성능을 보여 주었다.

According to the increment of urban buildings, the demand of eco-environment space will be also increased. Therefore, the artificial ground green system on a roof will be supplied gradually. In this study, the concept of simplification, unification and prefabrication was widely applied to supply green system. Consequently, the box unit system with a continuous soil layer was developed, and adhesive property, wind resistance and insulation property of this system were evaluated for site application. As a results of adhesive property and wind resistance test, comparing with design wind pressure and wind velocity, this system was safe at the height of 100m building located in urban. In addition, results of temperature measurement for 120 days showed 17% higher insulation property at daytime and 45% higher insulation property at night than normal box unit system owing to continuous soil layer.

There are many factors that generate the early deterioration of the concrete structure. As the one of the representative factors, we can think an invasion of the water, air and so on. The water and air invade in inside void along the capillarity and they become the cause that the durability like corrosion of layer department due to freezing and thawing, inside steel frame corrosion, and so on blacks. Therefore with covering permeability covering waterproofing material of fluid condition in outer wall, intercepting the deterioration factor due to the infiltration of water from outside and for salt damage of concrete layer department, freezing damage and neutralization, it needs to improve durability of structure. This study separately examined physical and chemical specific of quality liguid siliceous of waterproofing material. Therefore as this applys the construction site, it improves the durability of concrete structure. Further this presents the application plan from the construction market against the new material.

There are many factors that generate the early deterioration of the concrete structure. As the one of the representative factors, we can think an invasion of the water, air and so on. The water and air invade in inside void along the capillarity and they become the cause that the durability like corrosion of layer department due to freezing and thawing, inside steel frame corrosion, and so on blacks. Therefore with covering permeability covering waterproofing material of fluid condition in outer wall, intercepting the deterioration factor due to the infiltration of water from outside and for salt damage of concrete layer department, freezing damage and neutralization, it needs to improve durability of structure. This study separately examined physical and chemical specific of quality liquid siliceous of waterproofing material. Therefore as this applys the construction site, it improves the durability of concrete structure. Further this presents the application plan from the construction market against the new material.

In 2017, 100 aftershocks with a magnitude of 2.0~3.0 and 615 minor earthquakes in Pohang in Korea caused the collapse and destruction of aggregate, tile, glass, and other structural components of multi-family houses constructed as finishing materials for buildings, causing damage to vehicles and casualties. Based on this factor, seismic design standards were established for non-structural elements of buildings that were applied only to past structures. Therefore, this study reinterpreted various vibration response spectra transmitted to waterproof layers as well as the definition and concept of the waterproof layer demand response spectrum derived by developing various vibration response test evaluation devices through a new testing apparatus.