PURPOSES : This study deals with a pressure relief joint, which is one of primary preventive methods of blow-up in concrete pavement. The purpose of the study is to estimate the joint sealant protrusion of pressure relief joint filler types according to horizontal displacement of concrete pavement by applying a variety of joint sealants and joint fillers. And test method for resistance of concrete to chloride ion penetration and test method for resistance of concrete to rapid freezing and thawing were conducted to analyze the improvement of concrete durability according to the primer types on concrete surface of stress relief joint.
METHODS : Joint fillers of pressure relief joint were categorized into four different types, which are was styrofoam+backer+sealant(type 1), styrofoam+sealant(type 2), foaming styrofoam+sealant(type 3), and preformed joint+sealant(type 4). By varying the depth (10, 20, 30, 50 mm) from the top of the test specimens to the sealant’s surface, the test factors were evaluated for a total of 16 variables. When the specimen’s joint spacing decreased from 70mm to 10mm, the load was stopped. And the displacement of the center of the joint protrusion was measured. The test was terminated when the specimen joint spacing was reduced to 60 mm. The horizontal displacement at the time when the joint protrudes over the specimen surface is recorded and analyzed as the critical threshold displacement.
RESULTS : According to the test results according to the type of joint filling material, it was found that there was a difference in the protrusion of the horizontal compression displacement according to the joint filling type. Under the current installation standard of 20mm, the preformed seal joint member showed the best crimping characteristics by securing the safety against protrusion until the horizontal displacement of 50mm occurred.
CONCLUSIONS : The most common failures in pressure relief joints are those related to joint sealants, which can be minimized by changing the current joint type, installation depth, etc. to suppress them.

ABSTRACT
1. 서론
2. 국내 콘크리트 포장면 솟음 현황
    2.1. 국내 콘크리트 포장면 솟음 실태
    2.2. 국내 콘크리트 포장 응력완화줄눈 설치기준
    2.3. 콘크리트 포장에서의 응력완화줄눈 파손형태
3. 실험계획 및 방법
    3.1. 응력완화줄눈 채움재 평가 시험
    3.2. 프라이머 내구성평가
4. 실험결과
    4.1. 주입줄눈재 종류에 따른 경화시간
    4.2. 응력완화줄눈 채움재 시험결과 분석
    4.3. 프라이머종류에 따른 염소이온 투과저항성분석
    4.4. 프라이머종류에 따른 동결융해 저항성분석
5. 결론
REFERENCES

• 류성우(한국도로공사 도로교통연구원) | Ryu Sungwoo
• 이재훈(한국도로공사 도로교통연구원) | Lee Jaehoon
• 배성호((주)토탈페이브시스템 기술연구소) | Bae Sungho
• 김현식((주)한국건설품질시험연구원 기술연구소) | Kim Hyunseok
• 정원경((주)한국건설품질시험연구원) | Jung Wonkyong 교신저자